Subject: Re: [alsa-user] Re: [linux-audio-dev] Theater Sound FX with Linux [was Re: playingthree sources at one time]
From: Jörn Nettingsmeier (nettings_AT_folkwang.uni-essen.de)
Date: Mon Jul 24 2000 - 01:39:34 EEST
Kai Vehmanen wrote:
>
> On Thu, 20 Jul 2000, Jörn Nettingsmeier forwarded from alsa-user:
>
> > I need to play several sounds (wav or mp3) at one time, but I need to
> > control the starting of every single sound manually, so a
> > multitrack-recording is not a solution (I need this for a play of our
> > laity-theater).
>
> Well, you could use ecasound and its ewf format to do this. Write a ewf
> file for each sound file, and then just:
>
> ecasound -a:1 -i sfx1.ewf \
> -a:2 -i sfx2.ewf \
> -a:n -i sfxn.ewf \
> -a:all -o alsa,0,0 # ... or /dev/dsp
>
> You can specify the actual starting time in the ewf-file. Here's a sample
> file (yup, not very flexible but works):
>
> -- cut, sfx1.ewf --
> source = sfx1.wav
> offset = 60.0
> length = 15.0
> -- cut --
>
> After 60 seconds, playback of sfx1.wav starts and lasts for 15 seconds.
> You can omit the 'length' parameter if you just want to play the whole
> file.
thanks for this explanation, kai !
but i think the problem is that you must be able to start a sample
"on visual cue", i.e. you don't know in advance when it's going to
happen.
is there anyway to do this with ecasound ?
regards,
jörn
-- Jörn Nettingsmeier Kurfürstenstr. 49 45138 Essen, Germany http://www.folkwang.uni-essen.de/~nettings/
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