Hi everyone,<div><br></div><div>I got this info about the anolog audio output being cheap PWM with filtering from this thread :
<a href="http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=8684">http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=8684</a> </div><div>I'm assuming these guys know what they're talking about (I think the first reply metioning this is by a member of the Raspberry Pi team.</div>
<div><br></div><div>Cheers,</div><div><br></div><div>Pierre<br><br><div class="gmail_quote">2012/8/14 Michael Zacherl <span dir="ltr"><<a href="mailto:sdiy-mz01@blauwurf.info" target="_blank">sdiy-mz01@blauwurf.info</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"><br>
On 14.8.2012, at 01:47 , Miller Puckette wrote:<br>
<br>
> Thanks for the info... some quick ideas:<br>
<br>
</div>good to know but that didn't help.<br>
<br>
I can't tell what it is but apparently it's a timing or order of execution issue at startup in batch-mode:<br>
Delaying the ; pd dsp 1 message by 200ms helps avoiding the "device busy" error.<br>
Same patch loaded in the gui, no problem. :-\<br>
<br>
According to 'top' the cpu load drops from 75% to about 70% with -nogui for a 4k-window.<br>
Just about enough to avoid glitching.<br>
But any system activity brings the sound to a halt for a short moment.<br>
<br>
So that was just an ssh-session and Pd running in batch-mode.<br>
<br>
At some point I'll go through this and see what can be done:<br>
<a href="http://puredata.info/community/pdwiki/Optimize/" target="_blank">http://puredata.info/community/pdwiki/Optimize/</a><br>
<div class="im"><br>
>> BTW, is it possible to quit Pd via the patch?<br>
>> Just in case Pd has such high priority that the system becomes inaccessible.<br>
>><br>
> Yep: the message is "; pd quit"<br>
<br>
</div>ah, of course!<br>
<br>
<br>
thanks, Michael.<br>
<div class="im HOEnZb"><br>
<br>
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