Rockbox

  • Status Closed
  • Percent Complete
    100%
  • Task Type Bugs
  • Category Music playback
  • Assigned To No-one
  • Operating System All players
  • Severity Low
  • Priority Very Low
  • Reported Version Daily build (which?)
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Rockbox
Opened by some-xtc - 2010-10-02
Last edited by Buschel - 2010-10-02

FS#11650 - "Garbage sounds" on Musepack (.mpc)

Hello again!

I've got another ( :-) ) complaint about Musepack:

On some tracks I hear annoying clink (It appears particularly after/with heavy basses).
This clink doesn't appear with other codecs on rockbox or with musepack+foobar2000.

I attached examples, where this clink very often appears.
I created these (of course) from my lossless source.
If you need a nother one, please let me know.

Tested with Clip+ & Fuze V1 & e260 v1

Greetings,
Leo

   exapmle01 (fail).mpc (689.4 KiB)
   exapmle01 (okay).mp3 (662.8 KiB)
   exapmle01 (okay).ogg (624.4 KiB)
Closed by  Buschel
2010-10-02 23:05
Reason for closing:  Fixed
Additional comments about closing:   Warning: Undefined array key "typography" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 371 Warning: Undefined array key "camelcase" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 407

Fixed with r28200

Buschel commented on 2010-10-02 21:18

Two questions from my side:
Can you add an lossless compressed sample (e.g. flac)?
Can you give an exact timestamp where this sound is audible?

Edit:
Can you also add a sv7 encoded file?
→ The spectrum of the decoded sv8 file looks strange.

some-xtc commented on 2010-10-02 21:43

The sound is right at the beginning audible (after the first second it gets nasty)

   example01 (sv7).mpc (715.1 KiB)
some-xtc commented on 2010-10-02 21:46

here is the source-sample (splitted in two parts)

   example01.7z.001 (2 MiB)
   example01.7z.002 (423.6 KiB)
Buschel commented on 2010-10-02 22:23

Ok, found the change that introduced the failure (for both sv7 and sv8). I am searching for the root cause…

some-xtc commented on 2010-10-02 22:26

I have played a bit with the musepack-encoder parameters.
The clink is on q5 very pronounced and it gets quieter with each quality-level.
At q10 the clink is lost (or just inaudible).

Buschel commented on 2010-10-02 23:05

Fixed with r28200. The error was caused a copy-paste-error when introducing new macros (4 months ago!). Your tests verify this perfectly: When raising q-level fewer subbands will be zero'ed out (silenced). The error itself was errorous silencing of subbands – old signal parts were kept instead. Therefor your experienced high frequency noise bursts after drums…

Thanks for supporting!!!!!

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