francolargo <francolargo@xxxxxx> wrote:
> I appreciate your thoughts on this, Doug and Erich!
>
> I'm testing on a Beaglebone Black running Debian Stretch.
>
> I found a ridiculously simple solution to the input sharing issue, at least
> in terms of the availability of a signal to SoX. By changing SoX input from
> 'hw:1,0' to 'dsnoop:1,0' ALSA does not lock up the source.
Good to know! (I'm not too familiar with non-basic-playback ALSA stuff)
> So, this runs:
> sox --buffer 1024 -r 48000 -c 2 -t alsa dsnoop:1,0 -t alsa plug:filter1
> ladspa ACDf 21 1 0 240 0.707 0 0 ladspa ACDf 21 1 0 240 0.707 0 0
Alright...
> But unfortunately this does not, giving the attached result:
> sox -V3 -M \
> “| sox -t alsa dsnoop:1,0 -p remix 1v1 ladspa ACDf 21 1 0 240 0.707 0 0
> ladspa ACDf 21 1 0 240 0.707 0 0” \
> “| sox -t alsa dsnoop:1,0 -p remix 1v1 ladspa ACDf 22 1 0 240 0.707 0 0
> ladspa ACDf 22 1 0 240 0.707 0 0” \
> “| sox -t alsa dsnoop:1,0 -p remix 2v1 ladspa ACDf 21 1 0 240 0.707 0 0
> ladspa ACDf 21 1 0 240 0.707 0 0” \
> “| sox -t alsa dsnoop:1,0 -p remix 2v1 ladspa ACDf 22 1 0 240 0.707 0 0
> ladspa ACDf 22 1 0 240 0.707 0 0” \
> -t alsa plug:testout4 remix -m 1,2 3,4
Your email shows “smart quotes”, is that from your email client?
If not and the smart quotes are in your original script,
it could be screwing up parsing at the shell level.
They should be a normal double quote: "
And in the above case, a single-quote (') works, too.
> sox: SoX v14.4.1
> sox FAIL sox: Not enough input filenames specified
>
> sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...]
> sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...]
> sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...]
> sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...]
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