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Re: Getting notifications for AudioUnit ProcessBufferLists method

Am 08.02.2005 um 19:09 schrieb Marc Poirier:
I believe that the original question is not about sequencer start/stop, but about the starting and stopping of DSP rendering between discontiguous audio regions, where Logic will turn off effects during the breaks to save on CPU (i.e. the sequencer is continuing to run this whole time). So far as I could tell from my tests, Logic is not calling AudioUnitReset() when stopping or restarting DSP in these cases, which causes the problem originally described. Unless I am missing something, I think that Logic should be doing a Reset on the AU(s) in those cases.
Ok, a "gap" in arrangement is something different.
In this case, there is indeed no reset because the engine keeps running during all time and we've found a few AUs acting so slow on Reset() (and allocating memory during that function) that it caused serious problems.

However, the missing reset should not be a problem because the engine keeps on processing the AU until the tailtime reported by the AU is over (or until there's less than 60 dB of output for more than 1 second or so). This way, the AU will run until their buffers are (at least very close to) silent, and the start of the next audio region should be processed without leftovers.

Again, if this isn't working as expected please let me know how to reproduce.

Best,
Stefan

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References: 
 >Getting notifications for AudioUnit ProcessBufferLists method (From: Stéphane Letz <email@hidden>)
 >Re: Getting notifications for AudioUnit ProcessBufferLists method (From: Marc Poirier <email@hidden>)
 >Re: Getting notifications for AudioUnit ProcessBufferLists method (From: Stéphane Letz <email@hidden>)
 >Re: Getting notifications for AudioUnit ProcessBufferLists method (From: Urs Heckmann <email@hidden>)
 >Re: Getting notifications for AudioUnit ProcessBufferLists method (From: Stéphane Letz <email@hidden>)
 >Re: Getting notifications for AudioUnit ProcessBufferLists method (From: Stefan Gretscher <email@hidden>)
 >Re: Getting notifications for AudioUnit ProcessBufferLists method (From: Marc Poirier <email@hidden>)



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