Re: stereo mixer (not synth) / music device bug?
Re: stereo mixer (not synth) / music device bug?
- Subject: Re: stereo mixer (not synth) / music device bug?
- From: "chris corbell"<email@hidden>
- Date: Mon, 16 Dec 2002 16:20:04 -0800
On Sunday, December 15, 2002, at 01:51 PM, Chris Rogers wrote:
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>
Chris,
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>
It sounds like your problem is simply that you're overloading the
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CPU when you have three or more MusicDevices running at the same
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time. [....]
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>
>[....]
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>The misbehavior is, if I add more than three MusicDevices, everything
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>gets 'strange'. The app begins responding sluggishly, playing of instrument
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>sounds is mangled (it sounds like sounds are being rendered at a
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>much lower frequency), and eventually the app can hang. However
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>if I limit myself to three MusicDevices everything works perfectly including
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>mixing through the mixer unit. If I create the graph with four
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>music devices,
Thanks very much for this clue! It was CPU usage, which I'm now checking
in my test app regularly.
Turning off reverb did not help that much - 4 music devices still pushed
90% of CPU just idling (on a G3 500 iBook) - but chaning the render-quality
to high (must be max by default) improved this significantly. I can now have
multiple notes sounding on 4 music devices without ever breaking 50%.
Thanks again,
Chris
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