[PD] Audio properties dialog

[Ivica Ico Bukvic]

On 10/07/2014 01:41 PM, Miller Puckette wrote:
> sys_blksize() reports the block size used by Pd's acheduler (I believe it's
> always 64 in valnilla but will be settable someday :)
>
> the I/O blocksize, which is set in the audio settings dialog, is what
> Pd uses to interface with whatever audio API is in use.

Thanks for the clarification, Miller. What I am confused by is that when 
using ALSA and changing blocksize from 64 to 2048, there is no audible 
difference in the delay, even though it should be profound enough to be 
preceivable by ear. Is this because ALSA has another internal buffer 
that essentially supersedes either blocksize, making the final output 
(near?) identical?

Also, response to Jonathan's follow-up question regarding JACK would be 
appreciated. It seems from looking at the code, JACK does not care about 
blocksize variable but I could be easily missing something.

Best,

Ico

>
> cheers
> M
>
> On Tue, Oct 07, 2014 at 05:30:55PM +0000, Jonathan Wilkes via Pd-list wrote:
>> Hi list,     What does the blocksize entry box in audio dialog properties do?  And how does that value relate (if at all) to the value output by sys_getblksize?
>> Thanks,Jonathan
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-- 
Ivica Ico Bukvic, D.M.A.
Associate Professor
Computer Music
ICAT Senior Fellow
DISIS, L2Ork
Virginia Tech
School of Performing Arts - 0141
Blacksburg, VA 24061
(540) 231-6139
ico at vt.edu
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