Re: [LAU] timemachine bug

On Sat, 22 Jan 2011 08:37:04 +0000
Peter Nelson <peter@email-addr-hidden> 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.

-- 
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
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