On Wed, Feb 03, 2010 at 12:55:25PM +0100, Jan Stary wrote: > On Feb 03 12:42:38, Jan Stary wrote: > > On Feb 03 11:29:43, Stuart Henderson wrote: > > > On 2010/02/03 12:06, Jan Stary wrote: > > > > I open a new project, record a new track (pressing the record button). > > > > A waveform appears as I record, corresponding obviously to the sounds > > > > I make. I stop the recording with the stop button. > > > > > > > > When I try to play it back (pressing the play button), there's no sound. > > > > The time-poisition bar does move through the waveform, but audacity > > > > does not play anything. > > > > > > Start audacity, go into preferences, click ok (this is a one-time > > > operation). This will probably fix things for you. > > > > Yes it does. > > Provided that I leave the preferences untouched. > Specifically, I leave Recording as > > Recording > Device: default > Cannels: 2 (Stereo) > > and don't change it to > > Recording > Device: default > Cannels: 1 (Mono) > > which, sadly, is exactly what I would like to have > (recording new tracks/instruments in mono). > > Is anyone experiecing the same? > > What's the reason of this behaviour? aucat server exposing a stereo > recording device in a way that the application cannot use it as a mono > recording device?
aucat can expose any number of channels (possibly filled with silence if the devices has less channels). > sox(1) can; why exactly is it that audacity(1) can't? I don't know; I got similar problems with the sample rate conversion; audacity claims that it resamples on the fly, but if you try to record at 44.1kHz from aucat running at 48kHz, then audiocity hangs as you described. Similarly if you choose anything but 32-bit precision, audicity fails. It seems that it fails almost every time it tries to perform conversions. Note that it does its own conversions, it doesn't use aucat. The last week I spent a lot of time on portaudio/audacity and it's still not clear where the problem comes from. I've found few small bugs that are not related to the issue, will submit them after the unlock. If you have an easy access to Linux or Windows, I'm courious whether audacity behaves similarly. -- Alexandre
