Now you need to start paman and find the names of both your microphone (or other recording device) and of the loopback device we just created.
Real time dsp – audio loopback software#
This is required because pulseaudio, unlike Jack, cannot directly connect audio software together we will hence use the loopback device as a proxy. Then you need to create an ALSA loopback device: sudo modprobe snd_aloop Just use any audio recording program to record a few seconds of noise, then cd into the directory you saved it to and do sox noise.wav -n noiseprof noise.prof. This is an old question, but I had the same problem and after some Googling (where I mostly found people who agreed it wasn't possible) and reading some man pages, I have now developed a solution based on user2330377's idea.įirst you need to create a noise profile for SoX.
Real time dsp – audio loopback update#
UPDATE - Full documentation Found Here Thanks to clément My suggestion is renaming the input device like this: load-module module-echo-cancel source_name=logitechsource source_properties=scription=LogitechHDĪnd again, restarting pulseaudio. Lastly, if you do not want a super long name on the Sound Settings (When you want to select an input/output device).
In this case I named the source logitechsource, but you can name it whatever you want and simply either restart pulseaudio. If you wish to set as default the echo cancel device simply turn the above line into: load-module module-echo-cancel source_name=logitechsourceĪnd then at the bottom of the file add set-default-source logitechsource You can find more information about it on the Echo Cancel Module Page Set input as default You should be able to select the new Noise Cancellation option from the Input Device Section: Reload PulseAudio ( pulseaudio -k) or simply restart the computer.
To do this follow this steps:Īdd the following line anywhere on the file, but I recommend almost at the end where you will find a comment about Echo Cancellation stuff (~line 140): load-module module-echo-cancel The one I found was the noise-cancellation module, which is one that dramatically lowers any static noise on the microphone and even A LOT of the background noise, basically giving you the benefit of only recording your own voice with excellent quality (For audio recording for example). Google.Ĥ) If everything else fails, or if LADSPA filters alone are not enough, look at the source of this module (or other Pulseaudio modules), and modify it accordingly.I started reading a lot about PulseAudio and "hidden" options it had so I could find one that was similar to this question. in Smartphones based on Linux maybe one of those is good enough for your needs. Maybe you can also load two LADSPA modules, use one as virtual output, loopback mic input to the other, and process both from a single LADSPA plugin - I didn't try that, but if it works, it may be simpler.ģ) There are also already noise-cancelling and echo-cancelling modules for Pulseaudio which are used e.g. combined sink, null sink as a virtual output sink) and/or pulseaudio loopback commands to forward both of them on different sets of channels to the LADSPA module. The module forwards LADSPA processed sound to master, but as you need both the mic input and the computer sound output, you may have to use some other modules (e.g. 1) I recommend doing this in Pulseaudio redirecting ALSA output through your filter will be more difficult.Ģ) There are already modules like module-ladspa-sink for Pulseaudio, details e.g.
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