I've encountered the same problem with audacity 1.0 and I have alsa .0.9.0beta12 ----- Original Message ----- From: John Haxby <[EMAIL PROTECTED]> Date: Thu, 12 Feb 2004 10:07:19 +0000 To: [EMAIL PROTECTED] Subject: Re: [Alsa-user] [bug ?] Audacity disfuncts using ALSA 1.x
[I've copied the Audacity list for information only. Unless this really is an audacity bug, I suggest that replies are made to the alsa list. I'll summarise the conclusions to the audacity list when the thread peters out.]
Rakotomandimby Mihamina wrote:
>I'm an Audacity user ( http://audacity.sourceforge.net ) and with some users , >we encounter problems since we switched from 0.9.x -> 1.x series , using our >software .
> >
I can't find the specific message referred to in the audacity mailing list archives and I deleted my copy of it, but this comment from someone else summarises the problem neatly:
>One sneaky problem I found was that when I first launched it and tried to > record, the cursor just flashed and didn't sweep across the window. >
Audacity is an OSS application and it uses portaudio. 1.2.0-pre4 uses portaudio-v18. For playback, audacity is supposed to behave just as you would expect an application with a graphical representation of a waveform -- a cursor sweeps across the waveform as it plays. The problem is that instead of sweeping majestically across the waveform in time to the music, the cursor just sits at the end and flashes like a mad thing as it is continally re-drawn.
I'm not entirely sure when the problem showed up. The cursor did its majestic sweeping thing with alsa 0.9.7 and I think with 0.9.8. It does the mad flashing thing with alsa 1.0.1 and 1.0.2.
There is a workaround -- running "aoss audacity" (for the audacity users, aoss is an application that gets built with the "OSS Compat. Library, alsa-oss). This, obviously, avoids the kernel's OSS emulation and has the added benefit that the cursor resumes its normal majestic sweeping.
I don't *think* this is an audacity/portaudio bug since the same binary works against some versions of ALSA and not against others.
Can anyone on either list shed any light on this?
jch
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