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PC Based Computer music servers, crossovers, and equalization

SPDI/F inputs for raspberry
SPDI/F inputs for raspberry
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Old 11th July 2018, 10:11 AM   #1
shining31 is offline shining31
diyAudio Member
Join Date: Mar 2018
Default SPDI/F inputs for raspberry

Hi folks,

I'm really happy with my raspberry based music player.
It use Volumio as a player and playlist management (Android app is great) and Iíve configured a brutefir convolution to do some digital XO, speaker equalization and room correction.

Every thing works fine with my SMSL AD18 and my DIY bookshelf.
I'm listening mainly flac files and internet radios. 24/96 most part of the time.

That said, I'm looking for a solution to process optical inputs as my TV and my Chromecast audio. (The idea is to use brutefir on them)
So, I've purchased an hifiberry digi+ I/O and connected my Chromecast.

And then, the hard part had begun. I've tried sox, alsaloop, arecord|aplay and many Brutefir configurations (pipes, files, devices Ö) with more or less success.
Most of the time I'm facing sample rates problems and finally havenít found any workable solution which start at boot, doesnít hang up and work anytime.

Do you guys have already do that with success? Implementing a robust solution?
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Old 11th September 2018, 05:31 PM   #2
RAndyB is offline RAndyB  United Kingdom
diyAudio Member
Join Date: May 2005
Location: Herefordshire
Just found your thread. I use alsaloop for TV sound, and have specified "plughw CARD=" as input. My Cirrus logic card will do rate conversion in hardware, can the hifiberry? If not you may need to delve deeper into alsaloop to use one of the sample rate conversion options.

It is possible to create an asound.conf that will handle more than one input simultaneously, however at present I just have two shell scripts to start alsaloop for tv, and stop it to play music from the pi.

Leave the Pi powered up, unless you are fanatical about saving electricity.

Hope this is not too late,

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