> Hi everyone
>
> In the last few weeks I have tried getting brutefir to work with kodi in
> openadk. My goal is to get room correction with kodi on my pi2. :-)
>
> While it is quite simple to use the brutefir convolution engine with mpd
> through jack, this does not work so easily in kodi, since kodi does not support
> jack. At least there is no official support as far as I'm aware.
>
> Now one possibility would be to try and implement jack support in kodi which I
> think would be rather hard, or maybe see if someone else has done something
> that could be used.
>
> However, there seems to be an easier way. For alsa there is a loopback driver
> called 'aloop' available in the linux kernel. Basically it simply adds a
> 'virtual loopback cable' device. This means the audio you play through this
> device will be available for capture in another device. You can find more on it
> here:
> https://alsa.opensrc.org/Jack_and_Loopback_device_as_Alsa-to-Jack_bridge
> So the idea is straight-forward: Set up kodi to play through this loopback
> device instead of the speakers, use the other end as input for brutefir, filter
> the audio and have brutefir output to the speakers.
>
> I tried it out, and I think I'm close to having it work. If you are interested,
> here is a proof of concept:
> - build adk with e.g. convolution, kodi and ADK_LINUX_KERNEL_SND_ALOOP.
> - start brutefir:
> $ brutefir -nodefault config.conf
> where config.conf is the attached brutefir cofig file.
> - play an audio file:
> $ audio.wav -Dhw:0
> On my pi2 with a hifiberry DAC+ installed this will play the brutefir-filtered
> audio through the hifiberry. If you don't have one, you may need to modify the
> config file.
>
> Now I don't quite have it working with kodi yet.
> With SND_ALOOP enabled, kodi's audio settings show 5 devices:
> 1 PI: HDMI
> 2 PI: Analogue
> 3 PI: HDMI and Analogue
> 4 ALSA: Loopback (@CARD=Loopback,DEV=0), LoopbackPCM
> 5 ALSA: Loopback (surround21:CARD=Loopback,DEV=0), Loopback PCM
>
> Note that the hifiberry (which works fine in kodi without aloop) is missing
> here. Why is that? Something seems not quite right.
> Also, when I select number 4 from the above, audio will be played through the
> berry even when brutefir is not running. And it is playing at full volume,
> ignoring kodi's volume setting, which does not sound nice at all.
> So something is clearly no ok yet.
> I do not have an asound file at this point (I think none should be needed?)
> Does anyone have an idea what I'm missing?
>
> Thanks for any ideas