Re: Route input to output with minimal latency

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Dear Clemens,

Thank you so much for the alsaloop tip, I just ran it with:

> chrt -rr 70 alsaloop -f S32_LE -C plughw:0 -P plug:ladspa -l 48

And it works perfectly, exactly what I needed! 😃

Regards
/Robert

> -----Original Message-----
> From: Robert Bielik [mailto:Robert.Bielik@xxxxxxxxx]
> Sent: den 21 juli 2017 11:32
> To: Clemens Ladisch <clemens@xxxxxxxxxx>; alsa-user@xxxxxxxxxxxxxxxxxxxxx
> Subject: Re:  Route input to output with minimal latency
> 
> Hello Clemens,
> 
> > Otherwise, you have to do the capture and playback in software.  See
> > the alsaloop tool.  What latency you can reach depends on how much
> > other applications and drivers interfere with the scheduling; on the
> > Pi, typical culprits are WiFi, ethernet, or USB.
> > Also see <https://wiki.linuxaudio.org/wiki/raspberrypi>.
> 
> Thanks, I'll look at alsaloop tool. For further info, I am using an I2S sound card
> (http://www.audioinjector.net/rpi-hat) , and have setup an ALSA device to
> route playback.pcm through a LADSPA plugin, so all DSP will reside in the
> plugin, thus I only need to route ALSA input to output in the application 😊
> 
> Regards
> /Robert
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