bpa wrote: 
> Ralphy might be able to provide some specific about whether loopback
> device needs to be same user / process tree etc. 
> 
> It is strange that arecord works and ecasound doesn't as they are run
> under same userid seems to imply an ecsasound config issue rather than a
> permissions one unless arecord has a "s" permissions.

The -i:alsa,hw:Loopack,1 should not have the comma after alsa.  Try

-i:alsahw,Loopback,1

I also had to add the user running LMS to the audio group before
ecasound could open the loopback device.

You can check the alsa device tree for a clue.


Code:
--------------------
    $ ls -l /dev/snd/
  total 0
  crw-rw---- 1 root audio 116,  0 May 18 14:35 controlC0
  crw-rw---- 1 root audio 116, 32 Jul 29 12:27 controlC1
  crw-rw---- 1 root audio 116, 64 May 18 14:35 controlC2
  crw-rw---- 1 root audio 116, 24 May 19 19:50 pcmC0D0c
  crw-rw---- 1 root audio 116, 16 Aug 14 11:07 pcmC0D0p
  crw-rw---- 1 root audio 116, 25 Aug 12 11:14 pcmC0D1c
  crw-rw---- 1 root audio 116, 17 May 18 14:35 pcmC0D1p
  crw-rw---- 1 root audio 116, 56 Aug 13 16:28 pcmC1D0c
  crw-rw---- 1 root audio 116, 88 May 18 14:35 pcmC2D0c
  crw-rw---- 1 root audio 116, 80 May 18 14:35 pcmC2D0p
  crw-rw---- 1 root audio 116, 89 May 18 14:35 pcmC2D1c
  crw-rw---- 1 root audio 116,  1 May 18 14:35 seq
  crw-rw---- 1 root audio 116, 33 May 18 14:35 timer
--------------------


One issue with running arecord is that it stops recording after about 3
hours, basically after having written 2GB.

This may be fixed in the current release, I'm still running 1.0.23.


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