[music-dsp] Graphics and sound sync

[Ross Bencina]

Just buffer the data (VUlevels) and draw it at the time you know the Audio
will play out. This requires you to know what the audio latency is.

see:
PortAudio and Media Syncronization
http://www.portaudio.com/docs/portaudio_sync_acmc2003.pdf

Ross.

----- Original Message ----- 
From: "Andrew Greenwood" <lists at silverblade.co.uk>
To: "a list for musical digital signal processing"
<music-dsp at shoko.calarts.edu>
Sent: Saturday, May 08, 2004 6:52 AM
Subject: [music-dsp] Graphics and sound sync


> How would you synchronize graphics and sound, for example in the case of a
> level meter?
>
> It should be fairly simple in an audio player, but what about for a
> near-realtime performance program?
>
> As graphics are updated immediately while sound isn't, how do you
compensate
> for the delay? Mainly, how do you get the graphics to animate at the
correct
> time?
>
> If that makes any sense...
>
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