Testing Needed for I2S DACs

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Testing Needed for I2S DACs

Postby michelangelo » Fri Oct 31 2014 15:30

Ok, guys. Since there are some issues with current kernel, I will update asap with a new one. Before doing that I want to ensure that it works ok with all the I2S DACs combinations, I simply cannot test them all by myself. This is where I need your help.

So, from your Volumio install (better if fresh), connect via SSH

Code: Select all
sudo apt-get update
sudo apt-get install binutils
sudo rpi-update e38850519c56b835dbd1c81e04d9307e154c36ed
sudo reboot


This will install kernel 3.12.26 (a slightly diffrent one than 1.41 tough).
Then please report :

1- Your model (B or B+)
2- Your i2s DAC model
3- At which bitdepths and bitres it works or not

As soon as I have more info, I can release an update, and everyone will be happy ! :D

UPDATE
I just uploaded an updated and fixed image of Volumio @ http://sourceforge.net/projects/volumio ... p/download

Unfortunately I don't have so much time to test it (leaving for the weekend). Please try and let me know if everything works!
Thank you guys, I am really appreciating your involvement!
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Testing Needed for I2S DACs

Postby JohnLoke » Fri Oct 31 2014 16:19

Hi Michelangelo,
Not so good...
With model b+ and iqaudio:
Flac 16/44.1 sounds good.
Flac 24/96 no sound.
Flac 32/96 no sound.
Flac 24/192 no sound.
I know it's not so confortable but that's what happened to me..!
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Re: Testing Needed for I2S DACs

Postby JohnJ » Fri Oct 31 2014 16:33

First – Big thanks for all your hard work Michelangelo!

I installed your updates with the 3.12.26 kernel described above and had much success.

1 - My model is: RPI B
2 - My I2s DAC is: Pi-DAC from IQaudIO.com
3 - I tested & verified: 24bit flac files at 48 kHx, 88.2kHz, 96 kHz, 176.4 kHz, 192 kHz

Before this kernel update I was having problems with Hi resolution files (using Volumio 1.5). With the 3.12.26 kernel all the tested files sounded good.
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Testing Needed for I2S DACs

Postby michelangelo » Fri Oct 31 2014 17:35

JohnLoke wrote:Hi Michelangelo,
Not so good...
With model b+ and iqaudio:
Flac 16/44.1 sounds good.
Flac 24/96 no sound.
Flac 32/96 no sound.
Flac 24/192 no sound.
I know it's not so confortable but that's what happened to me..!

With the update applied?
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Re: Testing Needed for I2S DACs

Postby JohnLoke » Fri Oct 31 2014 18:28

Yes sir!
Before the update 32/96 and 24/96 were played too fast, now no sound is played!

Update:
After a reboot 32/96 are ok!!!
24/96 and 24/192 still nothing...

May it doesn't like word at 24 bit..?
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Testing Needed for I2S DACs

Postby balbuze » Fri Oct 31 2014 19:54

Hi!
I update my Raspberry as you wrote and I did the following test with flac files :
16bits 44khz - ok
24bits 88khz - ok
24its 96khz - ok
24bits 192khz - ok

raspberry B
dac audiophonics ess 9023 i2s -
driver Hifiberry
Software mixer
But but : I can hear as soon as the play start a sort of crakling noise and it stop a the end of play. It is very more important at 16bits 44khz and diseappears with 24bits 44 or 88khz. I first thought of ground loop or something like that, even if I never heard it before.
I 've got from a test disc a "sound of silence" (no music) : the cracling noise appears clearly as there is no other noise.
So I reflash Volumio 1.4 : no crackling noise. So I think it 's a driver bug. Dont you think ?
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Testing Needed for I2S DACs

Postby Pete » Fri Oct 31 2014 21:22

That works just great, thanks - 16/44.1; 24/96 & 24/192 all play fine..

Raspberry B+, Audiophonics ES9023 I2S, with Hifiberry driver. :mrgreen:

Thank you very much for all your work - this is just great!
Last edited by Pete on Fri Oct 31 2014 22:20, edited 1 time in total.
At what point does tinkering with one's equipment start superseding one's enjoyment of music which, of course, should be the primary purpose of the exercise.
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Testing Needed for I2S DACs

Postby dersucher » Fri Oct 31 2014 21:51

I just tested the "downgraded kernel version" and it works :mrgreen:

1 model is B+
2 i2s DAC model is hifiberry dac +
3 perfectly: 24/96, 24/176, 24/192, 16/48. Other formats not tested

Many thanks, michelangelo for the new release and the work for volumio!

I'm sorry, I forgot to mention: 16/44,1 worked always. Only the higher resolution formats didn't work before the fix
Last edited by dersucher on Fri Oct 31 2014 22:20, edited 2 times in total.
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Re: Testing Needed for I2S DACs

Postby Beechwoods » Fri Oct 31 2014 22:01

Volumio v1.5 and new kernel 3.12.26 installed on my RPi B+ with iQAudio Pi-DAC+.

24-96 and 24-192 both working perfectly, along with regular 16-44.1. Very happy.

High-res weren't working before, with the 'stock' 1.5 image and kernel.

Many thanks for all your hard work on this. It is excellent. Setup of the Pi-DAC+ with Hardware volume control, via the web interface was easy and trouble-free. I had my install working in about 5 minutes, and I could have sworn that the sound quality is better than in Volumio 1.4 :-)
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Re: Testing Needed for I2S DACs

Postby birca1987 » Fri Oct 31 2014 22:18

Tested on RPi B+ with Curryman Dac Es9023 and Hifiberry driver and everything is ok after update. Thanks a lot for your hard work.
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