What's the accuracy?

[Specy]

I need a pretty precise timeout that i use as a delay function inside my music composer app, with standard setTimeout i get +-10ms of error, with timeouts being of around 50/200 ms each, would using this increase the accuracy?

[chrisguttandin]

Hi @Specy, I recently made a test and the accuracy was indeed a bit higher. However I would recommend testing it yourself directly in your app.

If possible I would also recommend not using setTimeout at all if it really needs to be precise and use the scheduling capabilities of the Web Audio API instead.

[Specy]

In the end i used this method which gives me a pretty accurate +-1ms error which is totally acceptable, i need to do some UI things (i'm using react) so the webaudio api wouldn't be of much help on that.

            let pastError = 0
            let previousTime = new Date().getTime()
            while (this.state.isPlaying) {
                const { song, settings } = this.state
                let msPerBPM = Math.floor(60000 / settings.bpm.value) + pastError
                previousTime = new Date().getTime()
                await delayMs(msPerBPM)   
                this.handleTick()
                pastError = previousTime + msPerBPM - new Date().getTime()
            }

i'm still going to use your module just to have that little better performance, thanks for making it and for helping out!

[chrisguttandin]

Thanks for reporting back. I'm happy that it works for you.