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Basically these things have to do with performance. <br>
<br>
'Use callbacks' has to do with how Pd communicates with your
soundcard. There are two options, using callbacks, and blocking. In
the callbacks scenario, your computer processes samples then asks
the sound card to 'call you back' when it's ready to receive those
samples (i.e. when it is out of audio to play and needs some more).
In the meantime, you can process more samples, or check out what's
going on on CNN.com or whatever.<br>
<br>
In the blocking method the computer hands the samples to the
soundcard by calling a function and if the sound card is not ready,
it 'blocks' meaning it stops your function in its tracks until it is
ready to receive the data. Your thread (Pd) will halt until the
function that sends the audio has finished. <br>
<br>
Anybody out there, please correct me if I am spreading
misinformation here, but this is my understanding of this
distinction.<br>
<br>
Delay(msec) is a delay between logical time (when your computer
computes the audio) and real time (when the sound comes out the
speaker). You want to have some head room here. I've seen really
good setups get down to below 10ms (as low as 4) without any
glitches, but usually you want much more time ~50ms or so.<br>
<div class="moz-cite-prefix"><br>
On 2/17/2015 5:42 PM, Jonghyun Kim wrote:<br>
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cite="mid:CAC8jf9e8K6gTo6yDHv5=yzUPRdT0A3VMDz2mgusxHnhYa3Fdag@mail.gmail.com"
type="cite">
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<p dir="ltr">Fyi, I use jack on Linux for PD. </p>
<div class="gmail_quote">On Feb 18, 2015 8:16 AM, "Jonghyun Kim"
<<a moz-do-not-send="true" href="mailto:agitato816@gmail.com">agitato816@gmail.com</a>>
wrote:<br type="attribution">
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.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi list,
<div><br>
</div>
<div>I would like to know about some features in audio
settings.</div>
<div><br>
</div>
<div>I don't understand what mean these options.</div>
<div><br>
</div>
<div>*Delay(msec)* and *Use callbacks*</div>
<div><br>
</div>
<div>I googled these options, but still I don't understand.
Is there some document about it?</div>
<div><br>
</div>
<div>Thanks in advance,</div>
<div>akntk</div>
</div>
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