Would it be the case that Ardour etc are thinking this is a mono
file? A stereo file played as mono could sound half-speed (maybe
somewhat distorted, depending on the differences betweeen the channels).
Victor
----- Original Message -----
From: "Raymond Martin" <laseray(a)gmail.com>
To: <linux-audio-dev(a)lists.linuxaudio.org>
Sent: Monday, October 05, 2009 7:23 PM
Subject: [LAD] Half speed audio playback issue
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
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