I'm in the process of setting up a RasPi 3 B v1.2 with runeaudio (version: rAudio1). I am using active speakers and want to integrate the necessary DSP-functionality into the Pi using ecasound, following the instructions by Richard Taylor
On other systems I was able to create an alsa loopback device, use that as default audio sink and than connect the other end of that to ecasound which then outputs into the actual multichannel soundcard.
I was able to create the loopback device in runeaudio by creating the files /etc/modprobe.d/alsa-aloop.conf containing "options snd-aloop enable=1 index=3 pcm_substreams=1 id=Loopback" and /etc/modules-load.d/snd_aloop.conf containing "snd_aloop". However, this loopback device is not recognised by runeaudio as output option. The gears next to the Output options give me the following:
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# cat /etc/asound.conf
defaults.pcm.card 2
defaults.ctl.card 2
# aplay -l | grep ^card
card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]
card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
card 2: ICUSBAUDIO7D [ICUSBAUDIO7D], device 0: USB Audio [USB Audio]
but in ssh I get:
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rAudio:~ # cat /etc/asound.conf
defaults.pcm.card 2
defaults.ctl.card 2
rAudio:~ # aplay -l | grep ^card
card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]
card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
card 2: ICUSBAUDIO7D [ICUSBAUDIO7D], device 0: USB Audio [USB Audio]
card 3: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
card 3: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
Any suggestions how to proceed? My goal is to route all audio output to the Loopback device.
Thnaks in advance!