[PD] [ot] hdsp multiface problem / sample clock source

[Tim Blechmann]

> Have anything to do with blocksize and audiobuff of the applications, 
> not Jack?
i tried various blocksizes without success...

> Which versions of Jack and ALSA and from where?
jack 0.90.1, alsa 0.9.8 or 1.0.0_rc2 ... both compiled from gentoo
ebuild files...

> Does it run under just ALSA? What about OSS/OSS emulation?
when any application tries to access the sound device (alsa or oss) the
sound routed from the analog inputs to the line out sounds distorted ...
when stoping the application (or dsp in pd) the line out sounds good,
again...

> Did you try to change the frames per period? What happens if you only 
> use native Jack clients? Try routing sound into Jack, through Jack
> Rack and out again.
i haven't tried that, but i doubt, that it's a jack problem, but an alsa
problem...

> > btw, i can't start jack when i set the sample clock source to values
> > greater than 62khz ...
> 
> you need to change the mode of the card to Double Speed to use higher 
> sampling rates. see here:
> http://www.linuxjournal.com//article.php?sid=7024
i read that ... i used to change the sample clock source with
hdsploader, but jack didn't wanted to start (i'll have to check for the
error message) 

> [emphasis on *brand new* mine]
> You might investigate this firmware version problem. There are
> different
> stories going around about whether or not you [need to/are able to] 
> downgrade the firmware of an HDSP made after a certain date. ALSA list
> might also be a good place to check. This downgrade is only possible 
> using windoze utilities, unfortunately...
i downgraded the firmware as i read in dieb13's howto's 

> > the strangest thing ... when starting the audio application, the
> > output signal that is routed from the input channels has these
> > distortions, too, until i stop the application... 
> Sounds like a question for Linux-Audio-User or Jack lists. They also 
> have some HDSP specialists there!
it's probably a good idea to ask there ...

thanks ...	

 Tim                          mailto:TimBlechmann at gmx.de
                              ICQ: 96771783
                              http://www.nyds-exp-discogs.tk
--
The only people for me are the mad ones, the ones who are mad to live,
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                                                          Jack Kerouac