[LAU] timemachine bug

[Peter Nelson]

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.