[LAD] Half speed audio playback issue

Frank Smith frsmith at gmail.com
Mon Oct 5 20:19:37 UTC 2009

HI All
Just seen this mail,
My problem is that I export from my multi track machine running Beta 3
to my mastering machine with beta 3 as well.
All set at 48 K from Ardour on one to Ardour on the other.

I then export the two track master to disk at 44k 16bit.
The I use Audacity to make my Ogg files.

Thing is they now seem to run to fast on both machines, and when I send them
by Email.

Multi track machine has RME as sound card and inputs to my DDX at 48K master

The DDX outputs to the  master box from the Spdiff out,  this is locked I
assume to the DDX now locked  to the RME card.

Am I missing some changes here?

When the ogg is emailed/played back they at a faster speed and the pitch
goes up accordingly

Hope there is enough info here..

2009/10/5 Raymond Martin <laseray at gmail.com>

> Hi all,
> Just wondering if any of you can give me a few clues as to what the
> possible
> culprits might be in the case of half speed (one octave down) audio
> playback.
> I have recorded live audio into Audacity (stereo @48Khz) and exported it
> out
> to a sound file (Ogg, MP3). It plays fine in Amarok, but at half speed in
> both
> Ardour and Qtractor. Audacity is going straight to ALSA, Amarok through
> Xine
> to ALSA.
> Looks like some kind of problem with Jack, which is very possible, but I
> had
> no problem with using fluidsynth through Rosegarden (I could not load an
> audio file into it to test though?). I tried to play straight into
> guitarix,
> rakarrak, etc. previously and ended up with really bad distorted sound,
> that
> also sort of sounded like sampling/processing was not up to speed. I tried
> with an rt kernel, but no difference (flaky audio hardware is possible).
> Anyway, if you have experienced this before just let me know what you think
> it is. Need to dig in further myself, but a few clues from more experiences
> Linux "audionaughts" will probably help narrow it down faster.
> Any input appreciated.
> Thanks.
> Raymond Martin
> _______________________________________________
> Linux-audio-dev mailing list
> Linux-audio-dev at lists.linuxaudio.org
> http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
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