Possibilities Allo Piano 2.1 with Volumio

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Possibilities Allo Piano 2.1 with Volumio

Postby PjV » Sat Oct 26 2019 12:43

I have ordered a Piano 2.1, for use in combination with Volumio (on RPI3B+)
As TI calls it a miniDSP, I wonder what is possible with the DSP in this DAC and the files that are generated for Volumio.
Is it, for example, possible to create a balanced (or differential) stereo output?
Similar to dual mode, but with the signal output by dac2 inverted.
Raspberry Pi 3B+ + Allo DigiOne => Dynaudio AIR 15 + BASE 12
Raspberry Pi 3A+ + Allo Piano 2.1 => JBL 308 / TPA3251 + N-Frame bass
Raspberry Pi 3A+ + USB DAC => JBL 305
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PjV
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Possibilities Allo Piano 2.1 with Volumio

Postby PjV » Fri Nov 08 2019 14:21

To answer my own question (I now have the Purepath Studio software)...
Yes, it is possible.
It seems I only have to generate 2 files, give them specific names and write those to a predefined location on the SD card.

I'm still waiting for the delivery of my new Pi (3A+), so I haven't been able to test it yet, but so far I'm confident it will work :D
Raspberry Pi 3B+ + Allo DigiOne => Dynaudio AIR 15 + BASE 12
Raspberry Pi 3A+ + Allo Piano 2.1 => JBL 308 / TPA3251 + N-Frame bass
Raspberry Pi 3A+ + USB DAC => JBL 305
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PjV
Sunday DIYer
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Posts: 26
Joined: Tue Jan 09 2018 18:11


Possibilities Allo Piano 2.1 with Volumio

Postby PjV » Sun Nov 17 2019 11:59

A bit more research, let's use this thread as a log :D
For Dac 0, in 2.1 and 2.2 mode, the systen uses the same bin files,. These files are located in the directory for 2.2.
Dac 1 files are in both the 2.1 and 2.2 folder.

On github I have found a source file that is used to determine the file (location and name) and 'uploads' the file to the dac.
I can alter this script so I have to create less files (one per dac, per sample rate.)
It is very likely I will only use one samplerate (96kHz), and have Volumio resample everything.
For now I am considering to create a 'custom' directory, that will be a sibling to 2.1 and 2.2
If probing for files, with different filenames (e.g. first 96000-60-0. bin, then 96000-0.bin) fails, the system can fallback to the original location and names.
Raspberry Pi 3B+ + Allo DigiOne => Dynaudio AIR 15 + BASE 12
Raspberry Pi 3A+ + Allo Piano 2.1 => JBL 308 / TPA3251 + N-Frame bass
Raspberry Pi 3A+ + USB DAC => JBL 305
Random avatar
PjV
Sunday DIYer
Sunday DIYer
 
Posts: 26
Joined: Tue Jan 09 2018 18:11


Possibilities Allo Piano 2.1 with Volumio

Postby PjV » Fri Nov 22 2019 09:40

I have found this thread on DIY Audio: https://www.diyaudio.com/forums/pc-based/310134-raspberry-pi-piano2-1-dac-dsp-volumio2.html
Basically everything I 'discovered' was already there...
Raspberry Pi 3B+ + Allo DigiOne => Dynaudio AIR 15 + BASE 12
Raspberry Pi 3A+ + Allo Piano 2.1 => JBL 308 / TPA3251 + N-Frame bass
Raspberry Pi 3A+ + USB DAC => JBL 305
Random avatar
PjV
Sunday DIYer
Sunday DIYer
 
Posts: 26
Joined: Tue Jan 09 2018 18:11


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