Re: [ecasound] lot of warning with chmute

From: Dubphil <dubphil@email-addr-hidden>
Date: Mon Mar 15 2010 - 13:31:36 EET

Joel Roth a écrit , Le 15/03/2010 10:27:
> You haven't said exactly what you are trying to do.
> You seem to want to selective mute each channel
> of a stereo signal. This is how I would do it for one
> stereo signal (untested).
> -a:j1 -f:f32_le,2,48000 -i:jack
> -eac:1,100 -km:2,0,100,60,1 # MIDI control amplification to channel 1
> -eac:2,100 -km:2,0,100,60,2 # MIDI control amplification to channel 2
> -o:jack

in fact a mute button is not really setting the amplification to 0, I
really need to mute the stereo channel by switching off the sound and
when I switch on the sound the level must stay at the value it has
before the switch off. That's why chmute is exactly what I need.

> Probably you understand that -f:32_le,2,4800 -i:jack creates (but
> does not connect) ports ecasound:in_1 and ecasound:in_2.
> Likewise for -o:jack, you need to use jack_connect or
> qjackctl to make the connections to the audio device.
> (For connecting directly to the soundcard, you would
> use -i:jack,system.)

yes of course, but I have a patchbay setup in Qjackctrl so no problem
about this.

> What I don't know is if your MIDI button can be programmed
> to toggle between 0 and 100. A range of 0 to 1 would
> make work if you added an additional 100x amplification
> factor.
> -a:j1 -f:f32_le,2,48000 -i:jack
> -ea:10000
> -eac:1,1 -km:2,0,1,60,1
> -eac:2,1 -km:2,0,1,60,2
> -o:jack
> Hope that gives you some useful ideas.

hey good idea, i never suspect that we could play with values like this
in ecasound :)
In fact, my button is programmed to toggle to 0 and 127, but as I said
below, I really nedd something that doesn't touch to the amplification

> I think Nama would allow you to apply these
> same chain operators.

My .ecs is far far more complex than the example I paste in this thread,
when I'm back to home I will send it to you.

> The CPAN version is outdated.
> The current git master version is okay. Julien
> has been using it for a while and isn't complaining. :-)
> Development has become a bit safer as we now have enough test
> coverage to know when new features are wreaking havoc.
> I'm waiting for one last feature to land before
> announcing a new release. This next release will also include a
> Debian package in 'unstable'.

good news !



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Received on Mon Mar 15 16:15:02 2010

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