Add value source test modal, auto-gain, brightness always-show, shared value streams

- Add real-time value source test: WebSocket endpoint streams get_value() at
  ~20Hz, frontend renders scrolling time-series chart with min/max/current stats
- Add auto-gain for audio value sources: rolling peak normalization with slow
  decay, sensitivity range increased to 0.1-20.0
- Always show brightness overlay on LED preview when brightness source is set
- Refactor ValueStreamManager to shared ref-counted streams (value streams
  produce scalars, not LED-count-dependent, so sharing is correct)
- Simplify acquire/release API: remove consumer_id parameter since streams
  are no longer consumer-dependent

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/api/routes/value_sources.py

@@ -1,8 +1,10 @@
 """Value source routes: CRUD for value sources."""
 
+import asyncio
+import secrets
 from typing import Optional
 
-from fastapi import APIRouter, Depends, HTTPException, Query
+from fastapi import APIRouter, Depends, HTTPException, Query, WebSocket, WebSocketDisconnect
 
 from wled_controller.api.auth import AuthRequired
 from wled_controller.api.dependencies import (
@@ -10,6 +12,7 @@ from wled_controller.api.dependencies import (
     get_processor_manager,
     get_value_source_store,
 )
+from wled_controller.config import get_config
 from wled_controller.api.schemas.value_sources import (
     ValueSourceCreate,
     ValueSourceListResponse,
@@ -43,6 +46,7 @@ def _to_response(source: ValueSource) -> ValueSourceResponse:
         mode=d.get("mode"),
         sensitivity=d.get("sensitivity"),
         smoothing=d.get("smoothing"),
+        auto_gain=d.get("auto_gain"),
         schedule=d.get("schedule"),
         picture_source_id=d.get("picture_source_id"),
         scene_behavior=d.get("scene_behavior"),
@@ -92,6 +96,7 @@ async def create_value_source(
             schedule=data.schedule,
             picture_source_id=data.picture_source_id,
             scene_behavior=data.scene_behavior,
+            auto_gain=data.auto_gain,
         )
         return _to_response(source)
     except ValueError as e:
@@ -138,6 +143,7 @@ async def update_value_source(
             schedule=data.schedule,
             picture_source_id=data.picture_source_id,
             scene_behavior=data.scene_behavior,
+            auto_gain=data.auto_gain,
         )
         # Hot-reload running value streams
         pm.update_value_source(source_id)
@@ -168,3 +174,68 @@ async def delete_value_source(
         return {"status": "deleted", "id": source_id}
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
+
+
+# ===== REAL-TIME VALUE SOURCE TEST WEBSOCKET =====
+
+
+@router.websocket("/api/v1/value-sources/{source_id}/test/ws")
+async def test_value_source_ws(
+    websocket: WebSocket,
+    source_id: str,
+    token: str = Query(""),
+):
+    """WebSocket for real-time value source output. Auth via ?token=<api_key>.
+
+    Acquires a ValueStream for the given source, polls get_value() at ~20 Hz,
+    and streams {value: float} JSON to the client.
+    """
+    # Authenticate
+    authenticated = False
+    cfg = get_config()
+    if token and cfg.auth.api_keys:
+        for _label, api_key in cfg.auth.api_keys.items():
+            if secrets.compare_digest(token, api_key):
+                authenticated = True
+                break
+
+    if not authenticated:
+        await websocket.close(code=4001, reason="Unauthorized")
+        return
+
+    # Validate source exists
+    store = get_value_source_store()
+    try:
+        store.get_source(source_id)
+    except ValueError as e:
+        await websocket.close(code=4004, reason=str(e))
+        return
+
+    # Acquire a value stream
+    manager = get_processor_manager()
+    vsm = manager.value_stream_manager
+    if vsm is None:
+        await websocket.close(code=4003, reason="Value stream manager not available")
+        return
+
+    try:
+        stream = vsm.acquire(source_id)
+    except Exception as e:
+        await websocket.close(code=4003, reason=str(e))
+        return
+
+    await websocket.accept()
+    logger.info(f"Value source test WebSocket connected for {source_id}")
+
+    try:
+        while True:
+            value = stream.get_value()
+            await websocket.send_json({"value": round(value, 4)})
+            await asyncio.sleep(0.05)
+    except WebSocketDisconnect:
+        pass
+    except Exception as e:
+        logger.error(f"Value source test WebSocket error for {source_id}: {e}")
+    finally:
+        vsm.release(source_id)
+        logger.info(f"Value source test WebSocket disconnected for {source_id}")

server/src/wled_controller/api/schemas/value_sources.py

@@ -21,8 +21,9 @@ class ValueSourceCreate(BaseModel):
     # audio fields
     audio_source_id: Optional[str] = Field(None, description="Mono audio source ID")
     mode: Optional[str] = Field(None, description="Audio mode: rms|peak|beat")
-    sensitivity: Optional[float] = Field(None, description="Gain multiplier (0.1-5.0)", ge=0.1, le=5.0)
+    sensitivity: Optional[float] = Field(None, description="Gain multiplier (0.1-20.0)", ge=0.1, le=20.0)
     smoothing: Optional[float] = Field(None, description="Temporal smoothing (0.0-1.0)", ge=0.0, le=1.0)
+    auto_gain: Optional[bool] = Field(None, description="Auto-normalize audio levels to full range")
     # adaptive fields
     schedule: Optional[list] = Field(None, description="Time-of-day schedule: [{time: 'HH:MM', value: 0.0-1.0}]")
     picture_source_id: Optional[str] = Field(None, description="Picture source ID for scene mode")
@@ -44,8 +45,9 @@ class ValueSourceUpdate(BaseModel):
     # audio fields
     audio_source_id: Optional[str] = Field(None, description="Mono audio source ID")
     mode: Optional[str] = Field(None, description="Audio mode: rms|peak|beat")
-    sensitivity: Optional[float] = Field(None, description="Gain multiplier (0.1-5.0)", ge=0.1, le=5.0)
+    sensitivity: Optional[float] = Field(None, description="Gain multiplier (0.1-20.0)", ge=0.1, le=20.0)
     smoothing: Optional[float] = Field(None, description="Temporal smoothing (0.0-1.0)", ge=0.0, le=1.0)
+    auto_gain: Optional[bool] = Field(None, description="Auto-normalize audio levels to full range")
     # adaptive fields
     schedule: Optional[list] = Field(None, description="Time-of-day schedule")
     picture_source_id: Optional[str] = Field(None, description="Picture source ID for scene mode")
@@ -68,6 +70,7 @@ class ValueSourceResponse(BaseModel):
     mode: Optional[str] = Field(None, description="Audio mode")
     sensitivity: Optional[float] = Field(None, description="Gain multiplier")
     smoothing: Optional[float] = Field(None, description="Temporal smoothing")
+    auto_gain: Optional[bool] = Field(None, description="Auto-normalize audio levels")
     schedule: Optional[list] = Field(None, description="Time-of-day schedule")
     picture_source_id: Optional[str] = Field(None, description="Picture source ID")
     scene_behavior: Optional[str] = Field(None, description="Scene behavior")

server/src/wled_controller/core/processing/kc_target_processor.py

@@ -162,7 +162,7 @@ class KCTargetProcessor(TargetProcessor):
         if self._brightness_vs_id and self._ctx.value_stream_manager:
             try:
                 self._value_stream = self._ctx.value_stream_manager.acquire(
-                    self._brightness_vs_id, self._target_id
+                    self._brightness_vs_id
                 )
             except Exception as e:
                 logger.warning(f"Failed to acquire value stream {self._brightness_vs_id}: {e}")
@@ -207,7 +207,7 @@ class KCTargetProcessor(TargetProcessor):
         # Release value stream
         if self._value_stream is not None and self._ctx.value_stream_manager:
             try:
-                self._ctx.value_stream_manager.release(self._brightness_vs_id, self._target_id)
+                self._ctx.value_stream_manager.release(self._brightness_vs_id)
             except Exception as e:
                 logger.warning(f"Error releasing value stream: {e}")
         self._value_stream = None
@@ -235,7 +235,7 @@ class KCTargetProcessor(TargetProcessor):
         # Release old stream
         if self._value_stream is not None and old_vs_id:
             try:
-                vs_mgr.release(old_vs_id, self._target_id)
+                vs_mgr.release(old_vs_id)
             except Exception as e:
                 logger.warning(f"Error releasing old value stream {old_vs_id}: {e}")
             self._value_stream = None
@@ -243,7 +243,7 @@ class KCTargetProcessor(TargetProcessor):
         # Acquire new stream
         if vs_id:
             try:
-                self._value_stream = vs_mgr.acquire(vs_id, self._target_id)
+                self._value_stream = vs_mgr.acquire(vs_id)
             except Exception as e:
                 logger.warning(f"Failed to acquire value stream {vs_id}: {e}")
                 self._value_stream = None

server/src/wled_controller/core/processing/processor_manager.py

@@ -109,6 +109,10 @@ class ProcessorManager:
     def audio_capture_manager(self) -> AudioCaptureManager:
         return self._audio_capture_manager
 
+    @property
+    def value_stream_manager(self) -> Optional[ValueStreamManager]:
+        return self._value_stream_manager
+
     @property
     def metrics_history(self) -> MetricsHistory:
         return self._metrics_history

server/src/wled_controller/core/processing/value_stream.py

@@ -158,6 +158,7 @@ class AudioValueStream(ValueStream):
         smoothing: float = 0.3,
         min_value: float = 0.0,
         max_value: float = 1.0,
+        auto_gain: bool = False,
         audio_capture_manager: Optional["AudioCaptureManager"] = None,
         audio_source_store: Optional["AudioSourceStore"] = None,
         audio_template_store=None,
@@ -168,6 +169,9 @@ class AudioValueStream(ValueStream):
         self._smoothing = smoothing
         self._min = min_value
         self._max = max_value
+        self._auto_gain = auto_gain
+        self._rolling_peak = 0.0       # tracks observed max raw audio value
+        self._rolling_decay = 0.995    # slow decay (~5-10s adaptation)
         self._audio_capture_manager = audio_capture_manager
         self._audio_source_store = audio_source_store
         self._audio_template_store = audio_template_store
@@ -237,6 +241,13 @@ class AudioValueStream(ValueStream):
             return self._prev_value
 
         raw = self._extract_raw(analysis)
+
+        # Auto-gain: normalize raw against rolling observed peak
+        if self._auto_gain:
+            self._rolling_peak = max(raw, self._rolling_peak * self._rolling_decay)
+            if self._rolling_peak > 0.001:
+                raw = raw / self._rolling_peak
+
         raw = min(1.0, raw * self._sensitivity)
 
         # Temporal smoothing
@@ -284,12 +295,18 @@ class AudioValueStream(ValueStream):
             return
 
         old_source_id = self._audio_source_id
+        old_auto_gain = self._auto_gain
         self._audio_source_id = source.audio_source_id
         self._mode = source.mode
         self._sensitivity = source.sensitivity
         self._smoothing = source.smoothing
         self._min = source.min_value
         self._max = source.max_value
+        self._auto_gain = source.auto_gain
+
+        # Reset rolling peak when auto-gain is toggled on
+        if self._auto_gain and not old_auto_gain:
+            self._rolling_peak = 0.0
 
         # If audio source changed, re-resolve and swap capture stream
         if source.audio_source_id != old_source_id:
@@ -525,15 +542,13 @@ class SceneValueStream(ValueStream):
 # Manager
 # ---------------------------------------------------------------------------
 
-def _make_key(vs_id: str, consumer_id: str) -> str:
-    return f"{vs_id}:{consumer_id}"
-
-
 class ValueStreamManager:
-    """Owns running ValueStream instances, keyed by ``vs_id:consumer_id``.
+    """Owns running ValueStream instances, shared and ref-counted by vs_id.
 
-    Each consumer (target processor) gets its own stream instance —
+    Value streams produce scalars (not LED-count-dependent), so a single
-    no sharing or ref-counting needed since streams are cheap.
+    stream instance is shared across all consumers that use the same
+    ValueSource.  Ref-counting ensures the stream is stopped only when
+    the last consumer releases it.
     """
 
     def __init__(
@@ -549,59 +564,66 @@ class ValueStreamManager:
         self._audio_source_store = audio_source_store
         self._live_stream_manager = live_stream_manager
         self._audio_template_store = audio_template_store
-        self._streams: Dict[str, ValueStream] = {}
+        self._streams: Dict[str, ValueStream] = {}      # vs_id → stream
+        self._ref_counts: Dict[str, int] = {}            # vs_id → ref count
 
-    def acquire(self, vs_id: str, consumer_id: str) -> ValueStream:
+    def acquire(self, vs_id: str) -> ValueStream:
-        """Create and start a ValueStream for the given ValueSource.
+        """Get or create a shared ValueStream for the given ValueSource.
 
-        Args:
+        Increments the ref count.  The stream is stopped only when all
-            vs_id: ID of the ValueSource config
+        consumers have called :meth:`release`.
-            consumer_id: Unique consumer identifier (target_id)
-
-        Returns:
-            Running ValueStream instance
         """
-        key = _make_key(vs_id, consumer_id)
+        if vs_id in self._streams:
-        if key in self._streams:
+            self._ref_counts[vs_id] += 1
-            return self._streams[key]
+            logger.info(f"Shared value stream {vs_id} (refs={self._ref_counts[vs_id]})")
+            return self._streams[vs_id]
 
         source = self._value_source_store.get_source(vs_id)
         stream = self._create_stream(source)
         stream.start()
-        self._streams[key] = stream
+        self._streams[vs_id] = stream
-        logger.info(f"Acquired value stream {key} (type={source.source_type})")
+        self._ref_counts[vs_id] = 1
+        logger.info(f"Acquired value stream {vs_id} (type={source.source_type})")
         return stream
 
-    def release(self, vs_id: str, consumer_id: str) -> None:
+    def release(self, vs_id: str) -> None:
-        """Stop and remove a ValueStream."""
+        """Decrement ref count; stop the stream when it reaches zero."""
-        key = _make_key(vs_id, consumer_id)
+        if vs_id not in self._ref_counts:
-        stream = self._streams.pop(key, None)
+            return
+
+        self._ref_counts[vs_id] -= 1
+        refs = self._ref_counts[vs_id]
+
+        if refs <= 0:
+            stream = self._streams.pop(vs_id, None)
             if stream:
                 stream.stop()
-            logger.info(f"Released value stream {key}")
+            del self._ref_counts[vs_id]
+            logger.info(f"Released value stream {vs_id} (last ref)")
+        else:
+            logger.info(f"Released ref for value stream {vs_id} (refs={refs})")
 
     def update_source(self, vs_id: str) -> None:
-        """Hot-update all running streams that use the given ValueSource."""
+        """Hot-update the shared stream for the given ValueSource."""
         try:
             source = self._value_source_store.get_source(vs_id)
         except ValueError:
             return
 
-        prefix = f"{vs_id}:"
+        stream = self._streams.get(vs_id)
-        for key, stream in self._streams.items():
+        if stream:
-            if key.startswith(prefix):
             stream.update_source(source)
-
+            logger.debug(f"Updated value stream {vs_id}")
-        logger.debug(f"Updated running value streams for source {vs_id}")
 
     def release_all(self) -> None:
         """Stop and remove all managed streams. Called on shutdown."""
-        for key, stream in self._streams.items():
+        for vs_id, stream in self._streams.items():
             try:
                 stream.stop()
             except Exception as e:
-                logger.error(f"Error stopping value stream {key}: {e}")
+                logger.error(f"Error stopping value stream {vs_id}: {e}")
         self._streams.clear()
+        self._ref_counts.clear()
         logger.info("Released all value streams")
 
     def _create_stream(self, source: "ValueSource") -> ValueStream:
@@ -632,6 +654,7 @@ class ValueStreamManager:
                 smoothing=source.smoothing,
                 min_value=source.min_value,
                 max_value=source.max_value,
+                auto_gain=source.auto_gain,
                 audio_capture_manager=self._audio_capture_manager,
                 audio_source_store=self._audio_source_store,
                 audio_template_store=self._audio_template_store,

server/src/wled_controller/core/processing/wled_target_processor.py

@@ -136,7 +136,7 @@ class WledTargetProcessor(TargetProcessor):
         if self._brightness_vs_id and self._ctx.value_stream_manager:
             try:
                 self._value_stream = self._ctx.value_stream_manager.acquire(
-                    self._brightness_vs_id, self._target_id
+                    self._brightness_vs_id
                 )
             except Exception as e:
                 logger.warning(f"Failed to acquire value stream {self._brightness_vs_id}: {e}")
@@ -190,7 +190,7 @@ class WledTargetProcessor(TargetProcessor):
         # Release value stream
         if self._value_stream is not None and self._ctx.value_stream_manager:
             try:
-                self._ctx.value_stream_manager.release(self._brightness_vs_id, self._target_id)
+                self._ctx.value_stream_manager.release(self._brightness_vs_id)
             except Exception as e:
                 logger.warning(f"Error releasing value stream: {e}")
         self._value_stream = None
@@ -270,7 +270,7 @@ class WledTargetProcessor(TargetProcessor):
         # Release old stream
         if self._value_stream is not None and old_vs_id:
             try:
-                vs_mgr.release(old_vs_id, self._target_id)
+                vs_mgr.release(old_vs_id)
             except Exception as e:
                 logger.warning(f"Error releasing old value stream {old_vs_id}: {e}")
             self._value_stream = None
@@ -278,7 +278,7 @@ class WledTargetProcessor(TargetProcessor):
         # Acquire new stream
         if vs_id:
             try:
-                self._value_stream = vs_mgr.acquire(vs_id, self._target_id)
+                self._value_stream = vs_mgr.acquire(vs_id)
             except Exception as e:
                 logger.warning(f"Failed to acquire value stream {vs_id}: {e}")
                 self._value_stream = None

server/src/wled_controller/static/css/modal.css

@@ -72,6 +72,51 @@
     font-size: 0.9em;
 }
 
+/* Value source test chart canvas */
+.vs-test-canvas {
+    display: block;
+    width: 100%;
+    height: 200px;
+    background: #111;
+    border-radius: 6px;
+}
+
+.vs-test-stats {
+    display: flex;
+    gap: 20px;
+    align-items: center;
+    padding: 10px 0 0;
+    font-family: monospace;
+}
+
+.vs-test-stat {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+}
+
+.vs-test-stat-label {
+    color: var(--text-muted, #888);
+    font-size: 0.85em;
+}
+
+.vs-test-stat-value {
+    font-weight: 600;
+    min-width: 50px;
+}
+
+.vs-test-value-large {
+    font-size: 1.3em;
+    color: #4caf50;
+}
+
+.vs-test-status {
+    text-align: center;
+    padding: 8px 0;
+    color: var(--text-muted, #888);
+    font-size: 0.9em;
+}
+
 @keyframes fadeIn {
     from { opacity: 0; }
     to { opacity: 1; }

server/src/wled_controller/static/js/app.js

@@ -120,6 +120,7 @@ import {
     showValueSourceModal, closeValueSourceModal, saveValueSource,
     editValueSource, cloneValueSource, deleteValueSource, onValueSourceTypeChange,
     addSchedulePoint,
+    testValueSource, closeTestValueSourceModal,
 } from './features/value-sources.js';
 
 // Layer 5: calibration
@@ -360,6 +361,8 @@ Object.assign(window, {
     deleteValueSource,
     onValueSourceTypeChange,
     addSchedulePoint,
+    testValueSource,
+    closeTestValueSourceModal,
 
     // calibration
     showCalibration,

server/src/wled_controller/static/js/features/targets.js

@@ -868,7 +868,7 @@ export function createTargetCard(target, deviceMap, colorStripSourceMap, valueSo
             </div>
             <div id="led-preview-panel-${target.id}" class="led-preview-panel" style="display:${ledPreviewWebSockets[target.id] ? '' : 'none'}">
                 <canvas id="led-preview-canvas-${target.id}" class="led-preview-canvas"></canvas>
-                <span id="led-preview-brightness-${target.id}" class="led-preview-brightness" style="display:none"></span>
+                <span id="led-preview-brightness-${target.id}" class="led-preview-brightness" style="display:none"${bvsId ? ' data-has-bvs="1"' : ''}></span>
             </div>
             <div class="card-actions">
                 ${isProcessing ? `
@@ -1071,11 +1071,11 @@ function connectLedPreviewWS(targetId) {
                 _ledPreviewLastFrame[targetId] = frame;
                 const canvas = document.getElementById(`led-preview-canvas-${targetId}`);
                 if (canvas) _renderLedStrip(canvas, frame);
-                // Show brightness label when below 100%
+                // Show brightness label: always when a brightness source is set, otherwise only below 100%
                 const bLabel = document.getElementById(`led-preview-brightness-${targetId}`);
                 if (bLabel) {
                     const pct = Math.round(brightness / 255 * 100);
-                    if (pct < 100) {
+                    if (pct < 100 || bLabel.dataset.hasBvs) {
                         bLabel.textContent = `☀ ${pct}%`;
                         bLabel.style.display = '';
                     } else {

server/src/wled_controller/static/js/features/value-sources.js

@@ -10,12 +10,12 @@
  * This module manages the editor modal and API operations.
  */
 
-import { _cachedValueSources, set_cachedValueSources, _cachedAudioSources, _cachedStreams } from '../core/state.js';
+import { _cachedValueSources, set_cachedValueSources, _cachedAudioSources, _cachedStreams, apiKey } from '../core/state.js';
-import { fetchWithAuth, escapeHtml } from '../core/api.js';
+import { API_BASE, fetchWithAuth, escapeHtml } from '../core/api.js';
 import { t } from '../core/i18n.js';
 import { showToast, showConfirm } from '../core/ui.js';
 import { Modal } from '../core/modal.js';
-import { getValueSourceIcon, ICON_CLONE, ICON_EDIT } from '../core/icons.js';
+import { getValueSourceIcon, ICON_CLONE, ICON_EDIT, ICON_TEST } from '../core/icons.js';
 import { loadPictureSources } from './streams.js';
 
 export { getValueSourceIcon };
@@ -38,6 +38,7 @@ class ValueSourceModal extends Modal {
             mode: document.getElementById('value-source-mode').value,
             sensitivity: document.getElementById('value-source-sensitivity').value,
             smoothing: document.getElementById('value-source-smoothing').value,
+            autoGain: document.getElementById('value-source-auto-gain').checked,
             adaptiveMin: document.getElementById('value-source-adaptive-min-value').value,
             adaptiveMax: document.getElementById('value-source-adaptive-max-value').value,
             pictureSource: document.getElementById('value-source-picture-source').value,
@@ -80,6 +81,7 @@ export async function showValueSourceModal(editData) {
         } else if (editData.source_type === 'audio') {
             _populateAudioSourceDropdown(editData.audio_source_id || '');
             document.getElementById('value-source-mode').value = editData.mode || 'rms';
+            document.getElementById('value-source-auto-gain').checked = !!editData.auto_gain;
             _setSlider('value-source-sensitivity', editData.sensitivity ?? 1.0);
             _setSlider('value-source-smoothing', editData.smoothing ?? 0.3);
             _setSlider('value-source-audio-min-value', editData.min_value ?? 0);
@@ -108,6 +110,7 @@ export async function showValueSourceModal(editData) {
         document.getElementById('value-source-waveform').value = 'sine';
         _populateAudioSourceDropdown('');
         document.getElementById('value-source-mode').value = 'rms';
+        document.getElementById('value-source-auto-gain').checked = false;
         _setSlider('value-source-sensitivity', 1.0);
         _setSlider('value-source-smoothing', 0.3);
         _setSlider('value-source-audio-min-value', 0);
@@ -181,6 +184,7 @@ export async function saveValueSource() {
     } else if (sourceType === 'audio') {
         payload.audio_source_id = document.getElementById('value-source-audio-source').value;
         payload.mode = document.getElementById('value-source-mode').value;
+        payload.auto_gain = document.getElementById('value-source-auto-gain').checked;
         payload.sensitivity = parseFloat(document.getElementById('value-source-sensitivity').value);
         payload.smoothing = parseFloat(document.getElementById('value-source-smoothing').value);
         payload.min_value = parseFloat(document.getElementById('value-source-audio-min-value').value);
@@ -272,6 +276,194 @@ export async function deleteValueSource(sourceId) {
     }
 }
 
+// ── Value Source Test (real-time output chart) ────────────────
+
+const VS_HISTORY_SIZE = 200;
+
+let _testVsWs = null;
+let _testVsAnimFrame = null;
+let _testVsLatest = null;
+let _testVsHistory = [];
+let _testVsMinObserved = Infinity;
+let _testVsMaxObserved = -Infinity;
+
+const testVsModal = new Modal('test-value-source-modal', { backdrop: true, lock: true });
+
+export function testValueSource(sourceId) {
+    const statusEl = document.getElementById('vs-test-status');
+    if (statusEl) {
+        statusEl.textContent = t('value_source.test.connecting');
+        statusEl.style.display = '';
+    }
+
+    // Reset state
+    _testVsLatest = null;
+    _testVsHistory = [];
+    _testVsMinObserved = Infinity;
+    _testVsMaxObserved = -Infinity;
+
+    document.getElementById('vs-test-current').textContent = '---';
+    document.getElementById('vs-test-min').textContent = '---';
+    document.getElementById('vs-test-max').textContent = '---';
+
+    testVsModal.open();
+
+    // Size canvas to container
+    const canvas = document.getElementById('vs-test-canvas');
+    _sizeVsCanvas(canvas);
+
+    // Connect WebSocket
+    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+    const wsUrl = `${protocol}//${window.location.host}${API_BASE}/value-sources/${sourceId}/test/ws?token=${encodeURIComponent(apiKey)}`;
+
+    try {
+        _testVsWs = new WebSocket(wsUrl);
+
+        _testVsWs.onopen = () => {
+            if (statusEl) statusEl.style.display = 'none';
+        };
+
+        _testVsWs.onmessage = (event) => {
+            try {
+                const data = JSON.parse(event.data);
+                _testVsLatest = data.value;
+                _testVsHistory.push(data.value);
+                if (_testVsHistory.length > VS_HISTORY_SIZE) {
+                    _testVsHistory.shift();
+                }
+                if (data.value < _testVsMinObserved) _testVsMinObserved = data.value;
+                if (data.value > _testVsMaxObserved) _testVsMaxObserved = data.value;
+            } catch {}
+        };
+
+        _testVsWs.onclose = () => {
+            _testVsWs = null;
+        };
+
+        _testVsWs.onerror = () => {
+            showToast(t('value_source.test.error'), 'error');
+            _cleanupVsTest();
+        };
+    } catch {
+        showToast(t('value_source.test.error'), 'error');
+        _cleanupVsTest();
+        return;
+    }
+
+    // Start render loop
+    _testVsAnimFrame = requestAnimationFrame(_renderVsTestLoop);
+}
+
+export function closeTestValueSourceModal() {
+    _cleanupVsTest();
+    testVsModal.forceClose();
+}
+
+function _cleanupVsTest() {
+    if (_testVsAnimFrame) {
+        cancelAnimationFrame(_testVsAnimFrame);
+        _testVsAnimFrame = null;
+    }
+    if (_testVsWs) {
+        _testVsWs.onclose = null;
+        _testVsWs.close();
+        _testVsWs = null;
+    }
+    _testVsLatest = null;
+}
+
+function _sizeVsCanvas(canvas) {
+    const rect = canvas.parentElement.getBoundingClientRect();
+    const dpr = window.devicePixelRatio || 1;
+    canvas.width = rect.width * dpr;
+    canvas.height = 200 * dpr;
+    canvas.style.height = '200px';
+    canvas.getContext('2d').scale(dpr, dpr);
+}
+
+function _renderVsTestLoop() {
+    _renderVsChart();
+    if (testVsModal.isOpen) {
+        _testVsAnimFrame = requestAnimationFrame(_renderVsTestLoop);
+    }
+}
+
+function _renderVsChart() {
+    const canvas = document.getElementById('vs-test-canvas');
+    if (!canvas) return;
+
+    const ctx = canvas.getContext('2d');
+    const dpr = window.devicePixelRatio || 1;
+    const w = canvas.width / dpr;
+    const h = canvas.height / dpr;
+
+    ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
+    ctx.clearRect(0, 0, w, h);
+
+    // Draw horizontal guide lines at 0.0, 0.5, 1.0
+    ctx.strokeStyle = 'rgba(255, 255, 255, 0.1)';
+    ctx.setLineDash([4, 4]);
+    ctx.lineWidth = 1;
+    for (const frac of [0, 0.5, 1.0]) {
+        const y = h - frac * h;
+        ctx.beginPath();
+        ctx.moveTo(0, y);
+        ctx.lineTo(w, y);
+        ctx.stroke();
+    }
+    ctx.setLineDash([]);
+
+    // Draw Y-axis labels
+    ctx.fillStyle = 'rgba(255, 255, 255, 0.3)';
+    ctx.font = '10px monospace';
+    ctx.textAlign = 'left';
+    ctx.fillText('1.0', 4, 12);
+    ctx.fillText('0.5', 4, h / 2 - 2);
+    ctx.fillText('0.0', 4, h - 4);
+
+    const history = _testVsHistory;
+    if (history.length < 2) return;
+
+    // Draw filled area under the line
+    ctx.beginPath();
+    const stepX = w / (VS_HISTORY_SIZE - 1);
+    const startOffset = VS_HISTORY_SIZE - history.length;
+
+    ctx.moveTo(startOffset * stepX, h);
+    for (let i = 0; i < history.length; i++) {
+        const x = (startOffset + i) * stepX;
+        const y = h - history[i] * h;
+        ctx.lineTo(x, y);
+    }
+    ctx.lineTo((startOffset + history.length - 1) * stepX, h);
+    ctx.closePath();
+    ctx.fillStyle = 'rgba(76, 175, 80, 0.15)';
+    ctx.fill();
+
+    // Draw the line
+    ctx.beginPath();
+    for (let i = 0; i < history.length; i++) {
+        const x = (startOffset + i) * stepX;
+        const y = h - history[i] * h;
+        if (i === 0) ctx.moveTo(x, y);
+        else ctx.lineTo(x, y);
+    }
+    ctx.strokeStyle = '#4caf50';
+    ctx.lineWidth = 2;
+    ctx.stroke();
+
+    // Update stats
+    if (_testVsLatest !== null) {
+        document.getElementById('vs-test-current').textContent = (_testVsLatest * 100).toFixed(1) + '%';
+    }
+    if (_testVsMinObserved !== Infinity) {
+        document.getElementById('vs-test-min').textContent = (_testVsMinObserved * 100).toFixed(1) + '%';
+    }
+    if (_testVsMaxObserved !== -Infinity) {
+        document.getElementById('vs-test-max').textContent = (_testVsMaxObserved * 100).toFixed(1) + '%';
+    }
+}
+
 // ── Card rendering (used by streams.js) ───────────────────────
 
 export function createValueSourceCard(src) {
@@ -320,6 +512,7 @@ export function createValueSourceCard(src) {
             <div class="stream-card-props">${propsHtml}</div>
             ${src.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(src.description)}</div>` : ''}
             <div class="template-card-actions">
+                <button class="btn btn-icon btn-secondary" onclick="testValueSource('${src.id}')" title="${t('value_source.test')}">${ICON_TEST}</button>
                 <button class="btn btn-icon btn-secondary" onclick="cloneValueSource('${src.id}')" title="${t('common.clone')}">${ICON_CLONE}</button>
                 <button class="btn btn-icon btn-secondary" onclick="editValueSource('${src.id}')" title="${t('common.edit')}">${ICON_EDIT}</button>
             </div>

server/src/wled_controller/static/locales/en.json

@@ -862,6 +862,9 @@
   "value_source.mode.rms": "RMS (Volume)",
   "value_source.mode.peak": "Peak",
   "value_source.mode.beat": "Beat",
+  "value_source.auto_gain": "Auto Gain:",
+  "value_source.auto_gain.hint": "Automatically normalize audio levels so output uses the full range, regardless of input volume",
+  "value_source.auto_gain.enable": "Enable auto-gain",
   "value_source.sensitivity": "Sensitivity:",
   "value_source.sensitivity.hint": "Gain multiplier for the audio signal (higher = more reactive)",
   "value_source.smoothing": "Smoothing:",
@@ -893,6 +896,13 @@
   "value_source.deleted": "Value source deleted",
   "value_source.delete.confirm": "Are you sure you want to delete this value source?",
   "value_source.error.name_required": "Please enter a name",
+  "value_source.test": "Test",
+  "value_source.test.title": "Test Value Source",
+  "value_source.test.connecting": "Connecting...",
+  "value_source.test.error": "Failed to connect",
+  "value_source.test.current": "Current",
+  "value_source.test.min": "Min",
+  "value_source.test.max": "Max",
   "targets.brightness_vs": "Brightness Source:",
   "targets.brightness_vs.hint": "Optional value source that dynamically controls brightness each frame (overrides device brightness)",
   "targets.brightness_vs.none": "None (device brightness)",

server/src/wled_controller/static/locales/ru.json

@@ -862,6 +862,9 @@
   "value_source.mode.rms": "RMS (Громкость)",
   "value_source.mode.peak": "Пик",
   "value_source.mode.beat": "Бит",
+  "value_source.auto_gain": "Авто-усиление:",
+  "value_source.auto_gain.hint": "Автоматически нормализует уровни звука, чтобы выходное значение использовало полный диапазон независимо от громкости входного сигнала",
+  "value_source.auto_gain.enable": "Включить авто-усиление",
   "value_source.sensitivity": "Чувствительность:",
   "value_source.sensitivity.hint": "Множитель усиления аудиосигнала (выше = более реактивный)",
   "value_source.smoothing": "Сглаживание:",
@@ -893,6 +896,13 @@
   "value_source.deleted": "Источник значений удалён",
   "value_source.delete.confirm": "Удалить этот источник значений?",
   "value_source.error.name_required": "Введите название",
+  "value_source.test": "Тест",
+  "value_source.test.title": "Тест источника значений",
+  "value_source.test.connecting": "Подключение...",
+  "value_source.test.error": "Не удалось подключиться",
+  "value_source.test.current": "Текущее",
+  "value_source.test.min": "Мин",
+  "value_source.test.max": "Макс",
   "targets.brightness_vs": "Источник яркости:",
   "targets.brightness_vs.hint": "Необязательный источник значений для динамического управления яркостью каждый кадр (переопределяет яркость устройства)",
   "targets.brightness_vs.none": "Нет (яркость устройства)",

server/src/wled_controller/static/locales/zh.json

@@ -862,6 +862,9 @@
   "value_source.mode.rms": "RMS（音量）",
   "value_source.mode.peak": "峰值",
   "value_source.mode.beat": "节拍",
+  "value_source.auto_gain": "自动增益：",
+  "value_source.auto_gain.hint": "自动归一化音频电平，使输出使用完整范围，无论输入音量大小",
+  "value_source.auto_gain.enable": "启用自动增益",
   "value_source.sensitivity": "灵敏度：",
   "value_source.sensitivity.hint": "音频信号的增益倍数（越高反应越灵敏）",
   "value_source.smoothing": "平滑：",
@@ -893,6 +896,13 @@
   "value_source.deleted": "值源已删除",
   "value_source.delete.confirm": "确定要删除此值源吗？",
   "value_source.error.name_required": "请输入名称",
+  "value_source.test": "测试",
+  "value_source.test.title": "测试值源",
+  "value_source.test.connecting": "连接中...",
+  "value_source.test.error": "连接失败",
+  "value_source.test.current": "当前",
+  "value_source.test.min": "最小",
+  "value_source.test.max": "最大",
   "targets.brightness_vs": "亮度源：",
   "targets.brightness_vs.hint": "可选的值源，每帧动态控制亮度（覆盖设备亮度）",
   "targets.brightness_vs.none": "无（设备亮度）",

server/src/wled_controller/storage/value_source.py

@@ -45,6 +45,7 @@ class ValueSource:
             "mode": None,
             "sensitivity": None,
             "smoothing": None,
+            "auto_gain": None,
             "schedule": None,
             "picture_source_id": None,
             "scene_behavior": None,
@@ -93,6 +94,7 @@ class ValueSource:
                 smoothing=float(data.get("smoothing") or 0.3),
                 min_value=float(data.get("min_value") or 0.0),
                 max_value=float(data["max_value"]) if data.get("max_value") is not None else 1.0,
+                auto_gain=bool(data.get("auto_gain", False)),
             )
 
         if source_type == "adaptive_time":
@@ -171,10 +173,11 @@ class AudioValueSource(ValueSource):
 
     audio_source_id: str = ""    # references an audio source (mono or multichannel)
     mode: str = "rms"            # rms | peak | beat
-    sensitivity: float = 1.0     # gain multiplier (0.1–5.0)
+    sensitivity: float = 1.0     # gain multiplier (0.1–20.0)
     smoothing: float = 0.3       # temporal smoothing (0.0–1.0)
     min_value: float = 0.0       # minimum output (0.0–1.0)
     max_value: float = 1.0       # maximum output (0.0–1.0)
+    auto_gain: bool = False      # auto-normalize audio levels to full range
 
     def to_dict(self) -> dict:
         d = super().to_dict()
@@ -184,6 +187,7 @@ class AudioValueSource(ValueSource):
         d["smoothing"] = self.smoothing
         d["min_value"] = self.min_value
         d["max_value"] = self.max_value
+        d["auto_gain"] = self.auto_gain
         return d
 
 

server/src/wled_controller/storage/value_source_store.py

@@ -105,6 +105,7 @@ class ValueSourceStore:
         schedule: Optional[list] = None,
         picture_source_id: Optional[str] = None,
         scene_behavior: Optional[str] = None,
+        auto_gain: Optional[bool] = None,
     ) -> ValueSource:
         if not name or not name.strip():
             raise ValueError("Name is required")
@@ -144,6 +145,7 @@ class ValueSourceStore:
                 smoothing=smoothing if smoothing is not None else 0.3,
                 min_value=min_value if min_value is not None else 0.0,
                 max_value=max_value if max_value is not None else 1.0,
+                auto_gain=bool(auto_gain) if auto_gain is not None else False,
             )
         elif source_type == "adaptive_time":
             schedule_data = schedule or []
@@ -191,6 +193,7 @@ class ValueSourceStore:
         schedule: Optional[list] = None,
         picture_source_id: Optional[str] = None,
         scene_behavior: Optional[str] = None,
+        auto_gain: Optional[bool] = None,
     ) -> ValueSource:
         if source_id not in self._sources:
             raise ValueError(f"Value source not found: {source_id}")
@@ -231,6 +234,8 @@ class ValueSourceStore:
                 source.min_value = min_value
             if max_value is not None:
                 source.max_value = max_value
+            if auto_gain is not None:
+                source.auto_gain = auto_gain
         elif isinstance(source, AdaptiveValueSource):
             if schedule is not None:
                 if source.source_type == "adaptive_time" and len(schedule) < 2:

server/src/wled_controller/templates/index.html

@@ -127,6 +127,7 @@
     {% include 'modals/audio-template.html' %}
     {% include 'modals/test-audio-template.html' %}
     {% include 'modals/value-source-editor.html' %}
+    {% include 'modals/test-value-source.html' %}
 
     {% include 'partials/tutorial-overlay.html' %}
     {% include 'partials/image-lightbox.html' %}

server/src/wled_controller/templates/modals/test-value-source.html

@@ -0,0 +1,27 @@
+<!-- Test Value Source Modal -->
+<div id="test-value-source-modal" class="modal" role="dialog" aria-modal="true" aria-labelledby="test-value-source-modal-title">
+    <div class="modal-content">
+        <div class="modal-header">
+            <h2 id="test-value-source-modal-title" data-i18n="value_source.test.title">Test Value Source</h2>
+            <button class="modal-close-btn" onclick="closeTestValueSourceModal()" title="Close" data-i18n-aria-label="aria.close">&#x2715;</button>
+        </div>
+        <div class="modal-body">
+            <canvas id="vs-test-canvas" class="vs-test-canvas"></canvas>
+            <div class="vs-test-stats">
+                <span class="vs-test-stat vs-test-stat-current">
+                    <span class="vs-test-stat-label" data-i18n="value_source.test.current">Current</span>
+                    <span class="vs-test-stat-value vs-test-value-large" id="vs-test-current">---</span>
+                </span>
+                <span class="vs-test-stat">
+                    <span class="vs-test-stat-label" data-i18n="value_source.test.min">Min</span>
+                    <span class="vs-test-stat-value" id="vs-test-min">---</span>
+                </span>
+                <span class="vs-test-stat">
+                    <span class="vs-test-stat-label" data-i18n="value_source.test.max">Max</span>
+                    <span class="vs-test-stat-value" id="vs-test-max">---</span>
+                </span>
+            </div>
+            <div id="vs-test-status" class="vs-test-status" data-i18n="value_source.test.connecting">Connecting...</div>
+        </div>
+    </div>
+</div>

server/src/wled_controller/templates/modals/value-source-editor.html

@@ -123,13 +123,25 @@
                         </select>
                     </div>
 
+                    <div class="form-group">
+                        <div class="label-row">
+                            <label for="value-source-auto-gain" data-i18n="value_source.auto_gain">Auto Gain:</label>
+                            <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
+                        </div>
+                        <small class="input-hint" style="display:none" data-i18n="value_source.auto_gain.hint">Automatically normalize audio levels so output uses the full range, regardless of input volume</small>
+                        <label class="toggle-label">
+                            <input type="checkbox" id="value-source-auto-gain">
+                            <span data-i18n="value_source.auto_gain.enable">Enable auto-gain</span>
+                        </label>
+                    </div>
+
                     <div class="form-group">
                         <div class="label-row">
                             <label for="value-source-sensitivity"><span data-i18n="value_source.sensitivity">Sensitivity:</span> <span id="value-source-sensitivity-display">1.0</span></label>
                             <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                         </div>
                         <small class="input-hint" style="display:none" data-i18n="value_source.sensitivity.hint">Gain multiplier for the audio signal (higher = more reactive)</small>
-                        <input type="range" id="value-source-sensitivity" min="0.1" max="5" step="0.1" value="1.0"
+                        <input type="range" id="value-source-sensitivity" min="0.1" max="20" step="0.1" value="1.0"
                             oninput="document.getElementById('value-source-sensitivity-display').textContent = this.value">
                     </div>