From: Richard Ash [mailto:richard@...]
Sent: Sunday, December 26, 2004 5:34 PM
To: Till, Rich
Subject: Re: [Audacity-help] audacity and alsa 1.06
On Mon, 2004-12-20 at 14:04 -0600, Till, Rich wrote:
> I'm using Fedora core 3 and have recently installed audacity (the lastest
> version) It installed fine, opens fine, but when trying to record it wont
> record anything using the input as /dev/dsp and yes the mic is enabled and
> sound comes through the speakers when talking through the mic. I changed
> the input to use the Alsa drivers for my soundblaster card (alsa version
> 1.06) and it just locks up when recording and I have to kill the process.
> Is there a fix or patch to correct this?
Which version of portaudio is your copy of audacity compiled with?
If it is compiled with portaudio v18 (the default) then it only has OSS
support, and so can't be used directly with ALSA devices but must use
the OSS emulation layer.
If you compile with portaudio v19 you should be able to record and play
back from ALSA devices natively if you select the ALSA rather than OSS
device on the Audio I/O tab of the preferences. This usually works but
has some issues over releasing the device which can cause "unable to
open device" errors, but not normally freezes.
If you are using pre-complied binaries, make sure that you have the
correct (matching) versions of the libraries, header and program, as
there have been some changes to the ALSA API from version 0.9.x to
version 1.0.x which mean the two are not necessarily binary compatible.
Also, if you get any unresolved symbol errors whilst your system is
loading ALSA, then these are likely to kill your system in ways that may
well hand programs, as effectively bits of the (kernel mode) driver are
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