Heera
Posts: 11
Joined: Thu Jan 31, 2019 11:37 am

Using RPI as a DAC with Digital Room Correction!!!

Sat Feb 09, 2019 7:10 am

MiniDSP offers a standalone unit that does Dirac Live digital room correction for audiophiles.
It's basically a device you put between your audio source and your amplifier that adjusts the audio according to measurements made in your room, to improve sound quality.
It's pretty expensive though - about 500 Euros where I live.

So I started digging and found out the RPI is / should be able to run BruteFIR as a convolver.
As far as I've figured out right now, I should be able to take measurements with my Umik1 measurement microphone, and calculate the FIR filters with the freeware Align2 software:


These filters would then be used as input for BruteFIR running on the RPI.[

So - if I install a decent RPI DAC like the Hifiberry DAC+ Pro that has digital input (Toslink) and analog output, and manage to get BruteFIR to process the audio with the calculated filters in between, I should end up with proper FIR room correction that is more than just a filter in the spectrum domain - it should work in the time domain as well. Which is basically what Dirac Live does.

I'm pretty new to all this, has anybody done this before?
Am I wrong in thinking it'll work this way?

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