use decibels for mic calibration slider

src/mixer/audio.ts

@@ -286,7 +286,10 @@ export class AudioEngine extends ((EngineEmitter as unknown) as {
   }
 
   setMicCalibrationGain(value: number) {
-    this.micCalibrationGain.gain.value = value;
+    this.micCalibrationGain.gain.value =
+      value === 0
+        ? 1 :
+        Math.pow(10, (value / 10));
   }
 
   setMicVolume(value: number) {

src/mixer/state.ts

@@ -83,7 +83,7 @@ const mixerState = createSlice({
       open: false,
       volume: 1,
       gain: 1,
-      baseGain: 1,
+      baseGain: 0,
       openError: null,
       id: "None",
     },

src/optionsMenu/MicTab.tsx

@@ -124,9 +124,9 @@ export function MicTab() {
         <div>
           <input
             type="range"
-            min={1.0 / 10}
-            max={3}
-            step={0.05}
+            min={-24}
+            max={24}
+            step={0.2}
             value={state.baseGain}
             onChange={(e) =>
               dispatch(MixerState.setMicBaseGain(parseFloat(e.target.value)))