help me ! - distorted sound 24/48kHz

sern

Hi ,

My Odroid c1+ - sound via I2S to external DAC. Music library on USB HDD . and what I found : when I try to listen music from HDD (no matter if it is 120GB SSD or 500 GB "classic" 2,5'' drive or USB Pendrive ) 24b/48kHZ (it is last Radiohead ) everything seems OK with first track (it can be last track but firstly played) but when the next track is coming it is heavy distorted ! when i press "stop" and "play" again everything is OK. Till the next track -again distorted. again "stop" and "play" and OK. sometimes it can play 2 tracks perfectly .... but third again distorted....
When I tried Volumio and it plays perfectly everything . But I want Runeaudio because for me it sounds much better ! Period. and this odd behaviour drives me crazy.... i think it is software related problem - Volumio plays without distortions....
Just checked - 24bit/88.2kHz OK , 16bit / 44.1kHz Ok ... 24bit /48kHz FLAC - OK 24bit/96kHz wav -ok ... Radiohead is 24bit /48kHz WAV..
24bit/44.1kHz wav -OK. Problem with 24bit/ 48kHz files ?? so why not with 24bit/96kHz ... ? ???

hondagx35

Hi sern,

welcome to RuneAudio.

My Odroid c1+ - sound via I2S to external DAC.

With ODROID Hifishield or something else?

when i press "stop" and "play" again everything is OK.

This restarts the clock on the I2S output, so it seems to be a problem with the DAC.

Get access to the console and enter this command:

cat /proc/asound/card*/pcm*p/sub*/hw_params

What is the output while playing a distorted song?

Frank

- Get access to the console:
Use SSH from your PC

If you are not familiar with SSH read this for Windows or this for Linux/MacOS
The default login for RuneAudio is "root" with the password "rune" (without quotes).

sern

it is audio-gd's HDMI I2S output module to Raleigh Audio input module next is Ian's FIFO and reclocking (from diyaudio.com) and dual mono
TwistedPearAudio DAC (WM8741 based) ...

output from "your" command is :

closed
access: RW_INTERLEAVED
format: S32_LE
subformat: STD
channels: 2
rate: 48000 (48000/1)
period_size : 2048
buffer_size: 8192

as i wrote : no problems with my DAC/FIFO with all kind of music files/formats
maybe my Odroid is defective ?

BTW , why Rune "sees" all my 24bit wav's as 32bit ? i've converted this Radiohead album to FLAC and now Rune tells me "24bit"
and format is S24_LE and plays it all undistorted...

hondagx35

Hi sern,

BTW , why Rune "sees" all my 24bit wav's as 32bit ?

The question is, why sees MPD your WAVs as 32bit?
I will do some tests and see what the reason is.

i've converted this Radiohead album to FLAC and now Rune tells me "24bit"
and format is S24_LE and plays it all undistorted...

I have my whole music library in FLAC format, because it offers better tagging support.
So i didn't test WAV on the ODROID in depth.

BTW: Nice setup!

Frank

sern

Thank you very much ! nicest setup is nothing without your excellent RuneAudio software.....

(exactly - i have quad-mono Opus Dac ...)
about 32 bit wav's - yesterday I read , that it is something ALSA - related ALSA needs additional 8 bit for transport or sth.... but final
output is 24 bit. I don't know if it is true .
I'll play with these 24/48 wav's .. will see..
My music library is mostly in wav files because I used a PC- based (win XP heavily cutted, linear PS) CiCS memory player (CMP2/Cplay) with I2S output via Esi Juli@ card and for it wav's and cue sheets are "native" files.... but when I heard Odroid with yours RuneAudio i decided to switch to Rune. Despite for inconvenient for me mainly because of changes to music library structure and lack of direct display /screen
sonically it is step (big) forward. and some talks that I2S should sounds the same in every case.....

hondagx35

Hi sern,

Despite for inconvenient for me mainly because of changes to music library structure and lack of direct display /screen

You can add a local display, Rune (RP2/3 and ODROID-C2) is able to display the UI locally.

Frank

sern

yes , I know about local browser , but I need configure it by ethernet first (or use Odroid Magazine image ) but I'm starting to get used...
and learning.... (it is not so hard - I remember x386 PC's and MS-DOS )
OK. I've played with some wav's , setup etc. I bought Odroid C2 (with last Rune rc image ). I've tried Madeleine Peyroux The Blue Room bought at HDtracks (separate wav tracks 24/44.1 ) and distortions the same . Radiohead - same distortions after player start to play next track... Again , I must say it happens only with separate 24 bit wav tracks .
on Volumio ("...rc2fix" image for C2) - everything is OK . So , something is missed in RuneAudio with 24bit wav's .....
I know , that wav's are rare and I can convert it to flac's but wav is still studio standard .....

sern

My last try (i thought that it could be setup fault) - i rebuilt my old Buffalo IIIse DAC + Ian's FIFO and Si570 reclocking module and audio-gd's output and input I2S to HDMI modules and ... I've got the distorted sound same as with previous setup. With Volumio - no distortions.
of course distortions only with 24bit single track wav's - first track played perfectly next track starts distorted....
How distorted ? hmm the simplest answer could be : like frying music....

I tried some more - and this is what I finally found : it happens only with 24bit wav and 44.1kHz and 24/48kHz . And only with tracks/files
within 1 album - when tracks are added to playlist one after the another (first track +second .... ) but all tracks are from the same album - the second played is distorted (and next too) Usually I listen the music by whole albums not by tracks and when I made "patchworked" playlist
- first track from Radiohead , second from Gotye (all 24bit/44.1kHz) everything is OK , no distortions ..... but 2 tracks from the same album - second always distorted. ?!?!
24bit wav higher then 48kHz - everything OK. wt... ?!?!
sorry for my english ....