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Smooth spatial transitions with 0.2s ramps

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Jage9
2026-02-22 21:23:16 -05:00
parent ad2cd532be
commit 3d741b358a
5 changed files with 11 additions and 7 deletions
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3
client/src/audio/audioEngine.ts
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@@ -29,6 +29,7 @@ type SoundSpec = {
};
type OutputMode = 'stereo' | 'mono';
const SPATIAL_RAMP_SECONDS = 0.2;
export class AudioEngine {
private audioCtx: AudioContext | null = null;
@@ -300,7 +301,7 @@ export class AudioEngine {
const gainValue = mix?.gain ?? 0;
const listenGain = Number.isFinite(peer.listenGain) ? Math.max(0, peer.listenGain as number) : 1;
const panValue = mix?.pan ?? 0;
peer.gain.gain.linearRampToValueAtTime(gainValue * listenGain, this.audioCtx.currentTime + 0.1);
peer.gain.gain.linearRampToValueAtTime(gainValue * listenGain, this.audioCtx.currentTime + SPATIAL_RAMP_SECONDS);
if (peer.panner) {
const resolvedPan = this.outputMode === 'mono' ? 0 : Math.max(-1, Math.min(1, panValue));
peer.panner.pan.setValueAtTime(resolvedPan, this.audioCtx.currentTime);

5
client/src/audio/itemEmitRuntime.ts
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@@ -27,6 +27,7 @@ type EmitSpatialConfig = {
const ITEM_EMIT_BASE_GAIN = 1;
const SUBSCRIBE_PRELOAD_SQUARES = 5;
const UNSUBSCRIBE_HYSTERESIS_SQUARES = 8;
const SPATIAL_RAMP_SECONDS = 0.2;
/** Maps a 0-100 speed control to playback-rate range used by emitted audio. */
function resolveEmitPlaybackRate(raw: unknown): number {
@@ -223,10 +224,10 @@ export class ItemEmitRuntime {
const gainValue = mix?.gain ?? 0;
const panValue = mix?.pan ?? 0;
const emitVolume = volumePercentToGain(item.params.emitVolume, 100);
output.gain.gain.linearRampToValueAtTime(gainValue * emitVolume, audioCtx.currentTime + 0.1);
output.gain.gain.linearRampToValueAtTime(gainValue * emitVolume, audioCtx.currentTime + SPATIAL_RAMP_SECONDS);
if (output.panner) {
const resolvedPan = this.audio.getOutputMode() === 'mono' ? 0 : Math.max(-1, Math.min(1, panValue));
output.panner.pan.linearRampToValueAtTime(resolvedPan, audioCtx.currentTime + 0.1);
output.panner.pan.linearRampToValueAtTime(resolvedPan, audioCtx.currentTime + SPATIAL_RAMP_SECONDS);
}
}
}

5
client/src/audio/radioStationRuntime.ts
View File

@@ -165,6 +165,7 @@ type RadioSpatialConfig = {
const SUBSCRIBE_PRELOAD_SQUARES = 5;
const UNSUBSCRIBE_HYSTERESIS_SQUARES = 8;
const SPATIAL_RAMP_SECONDS = 0.2;
export class RadioStationRuntime {
private readonly sharedRadioSources = new Map<string, SharedRadioSource>();
@@ -295,10 +296,10 @@ export class RadioStationRuntime {
});
const gainValue = mix?.gain ?? 0;
const panValue = mix?.pan ?? 0;
output.gain.gain.linearRampToValueAtTime(gainValue, audioCtx.currentTime + 0.1);
output.gain.gain.linearRampToValueAtTime(gainValue, audioCtx.currentTime + SPATIAL_RAMP_SECONDS);
if (output.panner) {
const resolvedPan = this.audio.getOutputMode() === 'mono' ? 0 : Math.max(-1, Math.min(1, panValue));
output.panner.pan.linearRampToValueAtTime(resolvedPan, audioCtx.currentTime + 0.1);
output.panner.pan.linearRampToValueAtTime(resolvedPan, audioCtx.currentTime + SPATIAL_RAMP_SECONDS);
}
}
}

3
client/src/audio/spatial.ts
View File

@@ -51,7 +51,8 @@ export function resolveSpatialMix(options: SpatialMixOptions): SpatialMixResult
}
const volumeRatio = Math.max(0, 1 - distance / effectiveRange);
let gain = baseGain * Math.pow(volumeRatio, 2);
const shapedVolume = volumeRatio * volumeRatio * (3 - 2 * volumeRatio);
let gain = baseGain * shapedVolume;
const clampedX = Math.max(-range, Math.min(range, dx));
let pan = Math.sin((clampedX / range) * (Math.PI / 2));