How does the new clear function work for delay lines?
Is it just zero-ing out the whole delay line with a for loop?
Is there a lot of cpu used, for example, to clear a 2 minute delay line?
On 10/20/2017 07:49 PM, Matt Davey wrote:
How does the new clear function work for delay lines?
Is it just zero-ing out the whole delay line with a for loop?
basically yes. is there anything else that needs to be done?
Is there a lot of cpu used, for example, to clear a 2 minute delay line?
plenty. miller was very reluctant to add this feature to [delay] exactly because it breaks realtime safety.
a 2 minute delay line has 5292000 samples (when running at 44.1kHz) which is 21168000 bytes. so if deleting a single byte takes a single machine instruction on your architecture, this would some up 21168000 instructions to be called. on a decently modern i486 with turbo speed enabled, this might take up to 0.14 seconds. so make sure that you set the audio buffer high enough¹.
gfmards IOhannes
¹ on my currently-breaking-apart laptop it takes usually under 3ms; but this is arcane technology (and judging from the sound of the harddisk these measurements might be void in a few weeks)
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IOhannes m zmölnig -
Matt Davey