HiFiBerry Digi+ Works Best on RCA...!

[Cloth Ears]

I have just purchased an RPi2 Model B and a HiFiBerry Digi+ board. I'm using the RCA out on the Digi+ and that should support 192/24 audio, but files of this type will not play correctly,though files with lower sampling rates play just fine. What's the experience of other with 192 kHz sampling and 24 bit depth?

I notice that there is no option for:

device_tree_overlay=hifiberry-digiplus

in /boot/config.txt

Might the lack of specific support for the Digi+ board be the basis of the problem?

Thanks.

[hondagx35]

Hi Cloth Ears,

Might the lack of specific support for the Digi+ board be the basis of the problem?

No, because they use the same components (see here).

Where are the files stored (USB, NAS or ....)?

Frank

[Cloth Ears]

Thanks for the explanation Frank.

The audio files (.flac format) are on a NAS. They play correctly from the same NAS with my Simple Audio Roomplayer+ streaming music player using the same Ethernet cable and coaxial cable into my AV amp. As far as I can see, the problem is with the RuneAudio setup or the hardware.

[Cloth Ears]

I have carried out some further analyses. Accessing the same media files from a USB drive made no difference to playing 192/24 .flac files, so that rules out slow streaming of the media over Ethernet. I used PuTTY to ssh into the RPi and run the top command while playing 192/24 files. The mpd process was topping out at just 14% of CPU, so that says that it's not a lack of processing grunt.

Probably a software bug which will hopefully be fixed in version 0.4.

[Cloth Ears]

If I listen to the output of 24/196 files on headphones they play correctly. The problem appears to lie solely with output through the Digi+ board. Any thoughts anybody?

[Grundgütiger]

My suggestion is that Hans Beekhuyzen used the Transformer version of the Digi+ board. He mentioned that he payed 35 Euros which - as for today - is the price for that version. From HiFiBerry's web site: "The output transformer provides a full galvanic isolation between the Raspberry Pi and your DAC on the electrical output". This would explain the difference between the optical and the electric outputs Hans mentioned in his video.

[Cloth Ears]

If I listen to the output of 24/196 files on headphones they play correctly. The problem appears to lie solely with output through the Digi+ board. Any thoughts anybody?

I ran the same hardware (RP2 Model B and HiFiBerry Digi+ transformer version) using Volumio and the playback of 24/196 FLAC files was considerably better, though still not perfect. From that I conclude that it's a software issue.

[HansBeekhuyzen]

hey guys, why didn't you ask? On YouTube, Facebook, Google+, Twitter or the contact page on my site? I indeed used. I more or less covered this in another thread on this forum. See: post13950.html#p13950

[mrcarrotcake]

These seem to be out of stock. In fact the more expensive one doesnt even link properly on the website.

[hondagx35]

Hi mrcarrotcake,

These seem to be out of stock. In fact the more expensive one doesnt even link properly on the website.

I have no idea what you are talking about.

Both are available here

Frank