Value for player.firstBeatMs gets reset after after calling player.openMemory

[jhrtn]

After creating a player inside onReady() I set the value for player.firstBeatMs. I then download and decode an audio file and inside the SuperpoweredLoaded message log the value for player.firstBeatMs before and after calling player.openMemory(). The value for firstBeatMs gets reset back to 0 after calling openMemory. Is this expected behaviour? Other parameters do not get reset. Do we just need to set firstBeatMs in the SuperpoweredLoaded message after calling openMemory?

import { SuperpoweredWebAudio, SuperpoweredTrackLoader } from '/superpowered/SuperpoweredWebAudio.js';

class MyProcessor extends SuperpoweredWebAudio.AudioWorkletProcessor {
    // runs after the constructor
    onReady() {
        this.player = new this.Superpowered.AdvancedAudioPlayer(this.samplerate, 2, 2, 0, 0.501, 2, false);
        this.player.syncMode = this.Superpowered.AdvancedAudioPlayer.SyncMode_TempoAndBeat;
        this.player.firstBeatMs = 1000.24;
        this.bufferCount = 0;
        console.log(this.player.firstBeatMs) // logs 1000.24
        SuperpoweredTrackLoader.downloadAndDecode('example_track.mp3', this);
    }

    onMessageFromMainScope(message) {
        if (message.SuperpoweredLoaded) {
            const { buffer, url } = message.SuperpoweredLoaded;
            console.log(this.player.firstBeatMs) // logs 1000.24
            this.player.openMemory(this.Superpowered.arrayBufferToWASM(buffer), false, false);
            console.log(this.player.firstBeatMs) // logs 0
            this.player.play();
            this.sendMessageToMainScope({ loaded: true });
        }
    }

    processAudio(inputBuffer, outputBuffer, buffersize, parameters) {
        if (this.bufferCount % 5000 === 0) console.log(this.player.firstBeatMs) // logs 0
        
        if (!this.player.processStereo(outputBuffer.pointer, false, buffersize, 1)) {
            for (let n = 0; n < buffersize * 2; n++) outputBuffer.array[n] = 0;
        };
        this.bufferCount++;        
    }
}

if (typeof AudioWorkletProcessor === 'function') registerProcessor('MyProcessor', MyProcessor);
export default MyProcessor;

[gaborszanto]

Yes, changing firstBeatMs is the expected behaviour, since using openMemory you load new content. Just set it after calling openMemory.