Subject: Re: [linux-audio-user] How to record soft synths from muse (or any sequencer)
From: Dr. Matthias Nagorni (mana_AT_suse.de)
Date: Thu May 16 2002 - 18:45:10 EEST
On Thu, 16 May 2002, Bill Allen wrote:
> For the tracks that use timidity this is no problem since timidity writes
> wav files from midi tracks, but I'm bumfuddled as to how to do this with
> the synths. My first thought was to feed the synths into jack input using
> ecasound to read the jack output, but none of these synths support jack
I hope to add Jack support in AlsaModularSynth soon. AFAIK SpiralSynthModular
already supports Jack.
> yet. (An aside: would it be possible to write a ladspa plugin that did
> input and output to jack? That would enable any app that supported ladspa
> to have jack support).
No. This is not possible because the Jack server needs to synchronize the
applications. In LADSPA, the host drives the plugin. In a hypothetical
LADSPA Jack plugin, the plugin would have to drive the host
(I recommend http://jackit.sourceforge.net/docs/design for reading).
> So my question is how do I get the synths to write their output to audio
> files instead of to the soundcard? I suspect that I'm going to be
Many soundcards support internal "loopback" capture of the PCM output.
Takashi told me that AC97 loopback has quite low quality whereas SB Live /
Audigy provides better quality. Just start a playback software and play a
bit with alsamixer. Use spacebar to select activate/deactivate capture
sources. You can e.g. use KWaveView (this does not require KDE BTW) to
visualize the captured data. If you have found the settings for internal
capture, you can use e.g. arecord to produce WAVs.
-- Dr. Matthias Nagorni SuSE GmbH Deutschherrnstr. 15-19 phone: +49 911 74053375 D - 90429 Nuernberg fax : +49 911 74053483
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