[LAU] timemachine bug

[Philipp Überbacher]

Excerpts from Folderol's message of 2011-01-22 11:38:37 +0100:
> On Sat, 22 Jan 2011 08:37:04 +0000
> Peter Nelson <peter at fuzzle.org> wrote:
> 
> > On Fri, 2011-01-21 at 18:25 -0800, Kim Cascone wrote:
> > > when I connect the output of Audacity to Timemachine _by hand_ using 
> > > Patchage
> > > there is a delay in the stereo sound file between the start of audio in 
> > > ch1 & 2
> > > which is equal to the time at which the connections are physically made 
> > > to timemachine
> > > 
> > > in other words:
> > > - I create a 10 sec file of 440Hz sine in Audacity
> > > - play it back on loop
> > > - go to Patchage and connect ch1 from PortAudio (which is actually 
> > > Audacity) to Timemachine wait 10 seconds then connect ch2 to the other 
> > > input of Timemachine
> > > - hit record on Timemachine wait a couple of seconds
> > > - stop record on Timemachine
> > > - stop playback of 440 sine in Audacity
> > > - open the sound file recorded by Timemachine in Audacity
> > > - look at the start of the sound file
> > > - there is a delay between channels seen in the sound file equal to the 
> > > time I waited to connect ch1 & ch2
> > 
> > Maybe you could try with a JACK-native audio player. See below...
> > 
> > > side question: why do the outputs of Audacity appear as PortAudio in Jack?
> > > is it a reference to virtual ports being instantiated when playback 
> > > occurs in Audacity?
> > 
> > No, it's because Audacity does not support JACK. It only half-manages it
> > through using the PortAudio library.
> > 
> > Peter.
> 
> ... and the devs seem highly resistant to the idea of writing in full jack
> support - they've certainly been asked often enough. Maybe it's due to
> cross-platform implications.

Jack is available on Linux, Windows, OSX and Solaris as far as I know,
that' pretty cross platform if you ask me.

Anyway, I don't know whether this is a timemachine or audacity error.
The error probably won't occur with an audio editor that doesn't require
you to connect during playback.