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 Forum index » DIY Hardware and Software » ChucK programming language
Command Line Sequencer
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Kassen
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PostPosted: Fri Aug 01, 2008 12:58 am    Post subject: Reply with quote  Mark this post and the followings unread
Antimon,

Code:
SndBuf sndBufs[nSamples][nVoices];
Envelope envs[nSamples][nVoices];


is starting 8*7 *2 Ugens which probably has something to do with the CPU usage. I'd take some LiSa's there, which I suspect would greatly reduce the CPU usage and you'd only lose some versatility on what you can do with envelopes..
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PostPosted: Fri Aug 01, 2008 2:20 am    Post subject: Reply with quote  Mark this post and the followings unread
Kassen wrote:
Antimon,

Code:
SndBuf sndBufs[nSamples][nVoices];
Envelope envs[nSamples][nVoices];


is starting 8*7 *2 Ugens which probably has something to do with the CPU usage. I'd take some LiSa's there, which I suspect would greatly reduce the CPU usage and you'd only lose some versatility on what you can do with envelopes..


Yes, you're right of course. Not chucking all 8*7 envelopes to dac at startup, and unchucking those that aren't used might also help - though ChucK maybe optimises handling of finished SndBufs.

Since I did the cli sequencer on my last vacation a year ago, now might be a good time to spend this year's vacation fixing these things. sunny

/Stefan
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Kassen
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PostPosted: Fri Aug 01, 2008 2:56 am    Post subject: Reply with quote  Mark this post and the followings unread
I think anything connected to the sample-suckers will be polled at least, regardless of intra-Ugen optimisations. While Ugens are cheap compared to the equivalent in code (assuming sample-rate loops) they do add up. UnChucKing unused ADSR's will help, yes, but then again LiSa already has voice-cycling build in as well. I'm not sure exactly how those will compare.
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