[PD] 0 latency

[Frank Barknecht]

Hallo,
Juan Felipe Mejia hat gesagt: // Juan Felipe Mejia wrote:

> hi everyone, im a beggining to work with Puredata and a TD 9 Roland v- 
> drums.
> I'm using a MOTU ultralite mk3 as my in-out audio divice.
> I work with a MacBook Pro, 2.5 Ghz Intel core duo, 4 GB of ram.
> 
> Until now almost everything is working properly but the latency.
> Does anyone now how to get the 0 latency en puredata?

Zero latency is impossible in a computer software if you do some
processing of the incoming data before sending it out again.

> i've tried to reduce the sample rate to 30000 and even lower, the same  
> with the delay but there is still some latency.
> Lower than 30000 works better but the sound quality is bad.

Generally latency shrinks with higher samplerates and gets larger with
lower rates, provided you have the same blocksize. 

> I tried AudioDesk (the software that comes with the MOTU) to make some  
> live recordings and there were no delay, no latency.

Probably the soundcard is sending incoming data straight through, so no
processing is going on. Otherwise see above: Technically 0 latency is
impossible.

Ciao
-- 
Frank