[LAD] Half speed audio playback issue

victor Victor.Lazzarini at nuim.ie
Mon Oct 5 21:16:51 UTC 2009

I thought something like that was happening. But I'm curious: if a 2-channel
file is played over 4-channels it should go up an octave, should it not? 
have half as much data for 4 channels as you'd have for 2 channels and so it
would seem like it's going faster? Or my reasoning is wrong somewhere (it 
well be, I often get things like that mixed up)?


----- Original Message ----- 
From: "Raymond Martin" <laseray at gmail.com>
To: <linux-audio-dev at lists.linuxaudio.org>
Sent: Monday, October 05, 2009 8:52 PM
Subject: Re: [LAD] Half speed audio playback issue

> Hi Victor,
>> 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).
> The problem seems to have been the data spread out over 4 channels instead
> of 2, thus halving the output in terms of speed and consequently pitch.
> Thanks.
> Raymond
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> Linux-audio-dev at lists.linuxaudio.org
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