[LAU] Help with jack-volume please

drew Roberts zotzbro at gmail.com
Wed Feb 17 13:20:23 CET 2021


Fons,

thanks for the suggestion, trying to explore it now:

resampler.cc:29:12: fatal error: pmmintrin.h: No such file or directory
 #  include <pmmintrin.h>

I have been testing on a pi4. Is there any hope of this stuff working there
or do I need to move to an intel box? I don't know where the person I hope
to help with this intends to deploy but it is more likely on the intel  /
x86 side of things.

all the best,

drew

On Wed, Feb 17, 2021 at 4:12 AM Fons Adriaensen <fons at linuxaudio.org> wrote:

> On Tue, Feb 16, 2021 at 02:48:00PM -0500, drew Roberts wrote:
>
> > I need to be able to use jack-volume:
>
> As an alternative you could look at zita-jacktools:
>
>
> class JackGainctl(JackClient):
>
>     """
>     Multichannel dezippered audio gain control.
>
>     The 'gain' and 'mute' settings are independent. A gain
>     less than -120 dB is equivalent to 'off' (-inf dB).
>     The initial gain is 'off', not muted.
>
>     Gain changes are dezippered as follows:
>     'off' -> 'on'  : 10 ms fade in.
>     'on'  -> 'off' : 10 ms fade out.
>     otherwise      : gain changes by max 6 dB for each 10 ms.
>     """
>
> or
>
> class JackMatrix(JackClient):
>
>     """
>     Audio matrix with gain and delay controls for each input,
>     output, and input-output pair.
>
>     Gains are linear and can be negative to invert a signal.
>     Use db2lin() to set gains in dB. Delays are in seconds.
>     Absolute gain values lower than 1e-15 are set to zero.
>     Gain and delay changes are crossfaded over one Jack period.
>     """
>
>
> With a few lines of Python you interface these to whatever
> you need.
>
>
> Ciao,
>
> --
> FA
>
>
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> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> https://lists.linuxaudio.org/listinfo/linux-audio-user
>


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