[PlanetCCRMA] Audacity recording blues

Fernando Pablo Lopez-Lezcano nando@ccrma.Stanford.EDU
Sun Jun 6 16:14:01 2004

On Sat, 2004-06-05 at 23:23, William M. Quarles wrote:
> Reading the Audacity Wiki, Audacity can be compiled to support ALSA 
> natively <http://audacityteam.org/wiki/index.pl?LinuxIssues>: however, 
> Planet CCRMA does not do this, nor is it even provided as a recompile 
> option in the SRPM.  I think that this needs to be fixed soon.

The ALSA support is not really native (ie: with ALSA code written within
audacity). It is done by using PortAudio v19. But v19 has not yet been
officially released (I've been waiting for a long time to package it...
I think that the final v19 will also include jack support). Anyway, that
wiki also says:

"Note that v19 is still evolving and not as well tested, but it is the
only way that Audacity supports ALSA. Many users have reported good
experiences with it."

That suggests to me it is not very stable. Maybe it is time to test it
anyway :-) Thanks for the reminder. 

-- Fernando

> William M. Quarles wrote:
> > Ok, I tried using Audacity in Windows Me, and there was no problems with 
> > recording the second channel.  Also, I found error messages about ALSA 
> > buffer xruns in the logs.  So, I'm guessing that the number of buffer 
> > periods needs to be increased, which, granted, also increases latency, 
> > but I don't have a choice considering that the recording gets all 
> > screwed up while playing back other tracks.  If anyone has any other 
> > ideas, please let me know.
> > 
> > William
> > 
> > William M. Quarles wrote:
> > 
> >> Hi,
> >>
> >> I'm trying just to record one mono track in Audacity, then follow up 
> >> with another mono track while playing back the first track.  Simple, 
> >> one-at-a-time multitrack recording.  I first record my guitar, then my 
> >> voice.  However, after recording both tracks an playing them back, the 
> >> vocals come out distorted and sounding like a turntable that is on 
> >> slomo.  I'm assuming that this is an ALSA problem, as I have heard 
> >> that the standard recording sampling that ALSA does is insufficient. 
> >> However, I really don't know, so if anyone has any ideas, they would 
> >> be much appreciated!
> >>
> >> I'm using Fedora Core 1 with the 2.4.26-1.ll.rhfc1.ccrma kernel, and 
> >> I've already updated and upgraded everything through Apt. JACKit is 
> >> running, too.  I have two sound cards, but I am just using my 
> >> SoundBlaster Live! 5.1 Digital (CT0100).
> >>
> >> Peace,
> >> William
> >>