Re: [linux-audio-dev] audio application mixing/routing arch

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Subject: Re: [linux-audio-dev] audio application mixing/routing arch
From: Kai Vehmanen (kaiv_AT_wakkanet.fi)
Date: Wed Mar 29 2000 - 00:19:05 EEST

On Tue, 28 Mar 2000, David Slomin wrote:

> "realtime"
> MIDI ----> soft-synth --. mix to
> input \ multitrack ,--> audio output
> >---> audio ---<
> existing / editor `--> new track
> audio ----' to disc
> tracks

This is already possible. Soft-synth outputs to a sound card
(or better: to a ALSA dummy device). Multitrack app reads
from alsa loopback device and a set of input files and mixes these
to two outputs. I've tested the above setup with
SoundTracker+ALSA-0.5.x+ecasound-1.7.x combo.

> MIDI ----> soft-synth --. mix to
> input ) ,---> audio output
> ,-- effects <--' (
> / `--------------.
> \ \
> \ more /
> \ multitrack ,--> effects --'
> >-----> audio ----<
> existing / editor `--> new track
> audio ----' to disc
> tracks
[...]
> I agree that this is starting to look scary, but it is indeed
> a minimum requirement for many people. If the only way to do

Same here, already possible. Latencies will cause problems,
but with a bit of tweaking, it can be made to work. 

-- 
Kai Vehmanen <k_AT_eca.cx> ---------------- CS, University of Turku .
 . audio software for linux ...	http://www.eca.cx 		 .
 . armchair-tunes mp3/wav/ra .. http://www.wakkanet.fi/sculpcave .

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