I need to know can if RPi can output real 24 bit

Get help for Volumio here!

Ads helps Volumio remain Free and Open Source. Please consider donating to help us continue to serve you.

I need to know can if RPi can output real 24 bit

Postby Martin-Andersen » Thu Jan 29 2015 20:55

I have read and read and some say that 24bit are downscaled to 16 bit, when played through RPi.

I need to know if I can play a 24bit / 96Khz FLAC file with the RPi and DAC without any downscaling.
I don't want to pay for highres music and get it out in CD quality ;) The DAC can be any good DAC build for the pi, like this one http://www.gravitech.us/dusoulsoqufo.html

Can someone make me feel at rest
User avatar
Martin-Andersen
Fresh off the boat
Fresh off the boat
 
Posts: 5
Joined: Sun Jan 25 2015 16:09

Ads helps Volumio remain Free and Open Source. Please consider donating to help us continue to serve you.


I need to know can if RPi can output real 24 bit

Postby michelangelo » Thu Jan 29 2015 21:09

Hi Martin,
on the link you posted I read
" Durio Sound adds a 24-bit 192kHz ultimate sound quality with the lowest possible distortion to your Raspberry Pi. "

This quite gives you an answer ;)
User avatar
michelangelo
Founder
 
Posts: 3001
Joined: Sun Dec 15 2013 23:18


I need to know can if RPi can output real 24 bit

Postby Martin-Andersen » Fri Jan 30 2015 08:22

Thanks I read that :D But in the comments in the article https://volumio.org/raspberry-pi-i2s-dac-sounds-so-good/ i read that:

Tested several i2s-DACs with RPi and finally found out, that RPi is just a good
toy. I reached the best sound so far with PRI-DAC (http://www.tjaekel.com/T-DAC/r... (single stereo). The sound is
much better than with hifiberry. But the problem is, that RPi CANNOT play 24
bit audio via i2s. 24 bits are always converted to 16 bits. The internal clock
works best with 48 and 96 kHz sample rate but not very well with 44,1 kHz. The result is jitter! The
most sellers of RPI i2s DACs out there just conceal this fact.


And many DAC's are using i2s so how can the be 24bit ?
User avatar
Martin-Andersen
Fresh off the boat
Fresh off the boat
 
Posts: 5
Joined: Sun Jan 25 2015 16:09


I need to know can if RPi can output real 24 bit

Postby Mars5 » Tue Feb 03 2015 12:28

I have also seen references to this problem of truncation the 24 bit to 16 bit in the i2s drivers.

Anybody that can shed more light on the true situation?

Are there any Raspberry / i2s DAC's that are known to truncate to 16 bits?

Are there any Raspberry / i2s DAC's that are known to keep the 24 bits?
Random avatar
Mars5
Fresh off the boat
Fresh off the boat
 
Posts: 9
Joined: Thu Nov 27 2014 11:51


I need to know can if RPi can output real 24 bit

Postby matijaudio » Fri Feb 06 2015 09:22

Here is the answer and solution: bug-sound-soc-bcm-bcm2708-i2s-t2447.html
Random avatar
matijaudio
Sunday DIYer
Sunday DIYer
 
Posts: 20
Joined: Tue Jan 13 2015 18:01


I need to know can if RPi can output real 24 bit

Postby matijaudio » Fri Feb 06 2015 09:27

Random avatar
matijaudio
Sunday DIYer
Sunday DIYer
 
Posts: 20
Joined: Tue Jan 13 2015 18:01


Re: I need to know can if RPi can output real 24 bit

Postby solaar1974 » Thu Feb 12 2015 14:05

Read everything.
So still upconvert 24-bit in 16-bit ??? :(((((((
Don't real 24-bit ?<br/>
User avatar
solaar1974
Serious Listener
Serious Listener
 
Posts: 83
Joined: Thu Nov 20 2014 12:45
Location: Kharkiv, Ukraine


Return to Help

Who is online

Users browsing this forum: Google [Bot] and 1 guest