I am having some trouble wrapping my head around the snd_aloop module.I am trying to route all my audio through alsa without using pulseaudio. If I start jackd there's not sound from non alsa apps but things like rhythmbox or any other native jack supported software works just fine.The main reason is that I do mostly audio editing but I listen to videos online as well.I was reading that I can use the alsa snd_aloop module to setup virtual hw that I can route my non jack away apps audio through to get things to play nicely with jack via the alsa_in and alsa_out mechanism.i've read quite a few tutorials like this one, this one looked over a lot of the documentation here and here as well.The part that is most confusing to me is the loopback setup and the way alsa_in and alsa_out works.For example with the snd_aloop module there's 2 devices with 8 subdevicesmy aplay-l looks like this**** List of PLAYBACK Hardware Devices ****card 0: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]  Subdevices: 8/8  Subdevice #0: subdevice #0  Subdevice #1: subdevice #1  Subdevice #2: subdevice #2  Subdevice #3: subdevice #3  Subdevice #4: subdevice #4  Subdevice #5: subdevice #5  Subdevice #6: subdevice #6  Subdevice #7: subdevice #7card 0: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]  Subdevices: 8/8  Subdevice #0: subdevice #0  Subdevice #1: subdevice #1  Subdevice #2: subdevice #2  Subdevice #3: subdevice #3  Subdevice #4: subdevice #4  Subdevice #5: subdevice #5  Subdevice #6: subdevice #6  Subdevice #7: subdevice #7card 1: PCH [HDA Intel PCH], device 0: CS4208 Analog [CS4208 Analog]  Subdevices: 0/1  Subdevice #0: subdevice #0card 1: PCH [HDA Intel PCH], device 1: CS4208 Digital [CS4208 Digital]  Subdevices: 1/1  Subdevice #0: subdevice #0card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]  Subdevices: 1/1  Subdevice #0: subdevice #0card 2: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]  Subdevices: 1/1  Subdevice #0: subdevice #0card 2: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]  Subdevices: 1/1  Subdevice #0: subdevice #0if I try to setup my system like this:#jack capture and playbackpcm.jack_capture_1 {    type plug        slave.pcm hw:Loopback,0,0}pcm.jack_playback_1 {    type plug        slave.pcm hw:Loopback,0,1}#alsa capture and playbackpcm.alsa_input_1 {    type plug        slave.pcm hw:Loopback,1,0}pcm.alsa_output_1 {    type plug        slave.pcm hw:Loopback,1,1}#playback devicespcm.jack_audio_1 {  type asym  playback.pcm jack_playback_1  capture.pcm jack_capture_1}then do alsa_out -j playback -d jack_audio_1 sound.wavI still get no output even after making the connections in the jack routing map.My questions:Looking at my setup I have the loopback jack_capture_1  tied to hw:0,0loopback jack_playback_1 tied to hw:0,1that means any sound sent to jack_capture_1 should be echo out of jack_playback_1 is that correct?also is thealsa_in is the the alsa audio stream that'll go into the jack session whilealsa_out is the alsa audio stream that jack outputs after it finishes?I have been reading everything that I can on the snd_aloop but even their official documentation seems a bit lacking.Can someone help me sort this out?
alsa sound module snd_aloop
audio;alsa;jack