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Early concept for rendering the frequency waveform

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This commit is contained in:
Travis Ralston 2021-03-22 20:54:09 -06:00
parent da7d31aeb6
commit 8ddd14e252
6 changed files with 136 additions and 8 deletions
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4
src/voice/VoiceRecorder.ts
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@ -23,7 +23,7 @@ import {SimpleObservable} from "matrix-widget-api";
const CHANNELS = 1; // stereo isn't important
const SAMPLE_RATE = 48000; // 48khz is what WebRTC uses. 12khz is where we lose quality.
const BITRATE = 24000; // 24kbps is pretty high quality for our use case in opus.
const FREQ_SAMPLE_RATE = 4; // Target rate of frequency data (samples / sec). We don't need this super often.
const FREQ_SAMPLE_RATE = 10; // Target rate of frequency data (samples / sec). We don't need this super often.
export interface IFrequencyPackage {
dbBars: Float32Array;
@ -60,7 +60,7 @@ export class VoiceRecorder {
},
});
this.recorderContext = new AudioContext({
latencyHint: "interactive",
// latencyHint: "interactive", // we don't want a latency hint (this causes data smoothing)
sampleRate: SAMPLE_RATE, // once again, the browser will resample for us
});
this.recorderSource = this.recorderContext.createMediaStreamSource(this.recorderStream);