fix: recalibrate level meter dB window to [-70, -10] for FFT peak data

2026-06-08 14:20:50 -04:00
parent ad1c85f3ee
commit 149127c920
1 changed files with 2 additions and 2 deletions
@@ -15,8 +15,8 @@ public partial class LevelMeterFab : ComponentBase, IAsyncDisposable
    // spec contract: floor/ceiling define the dB window, and the linear map places
    // -12 dB at 60% fill (green/yellow) and -4.5 dB at 85% (yellow/orange) to match
    // the SVG gradient stops. The attack/release coefficients are by-ear tuning values.
-    private const double FloorDb = -30.0;            // fill = 0%
-    private const double CeilingDb = 0.0;            // fill = 100%
+    private const double FloorDb = -70.0;            // fill = 0%; lowered to match FFT peak values (AnalyserNode.getFloatFrequencyData returns peaks, not RMS — typical loud dance tracks cluster ~-40 to -60 dB)
+    private const double CeilingDb = -10.0;          // fill = 100%; lowered to match FFT peak ceiling (loud dance FFT peaks land around -10 dB, far below 0 dB RMS full-scale)
    private const double SilenceFloorDb = -80.0;     // matches the analyzer's normalization window

    private const double AttackCoefficient = 0.5;    // fast rise toward a louder reading