Rockbox

  • Status Closed
  • Percent Complete
    100%
  • Task Type Bugs
  • Category Music playback
  • Assigned To No-one
  • Operating System Sansa AMSv2
  • 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 rasferret - 2012-05-09
Last edited by MikeS - 2012-05-11

FS#12666 - clicking noise when using "fractional" timestrech ratios

After the rewrite of the dsp system (c9bcbe2) there are massive clicking noises when using “fractional” timestrech ratios (e.g. 180%).
When using the old dev build from 27.04.2012 (0842d7f) the clicks are mostly gone.

Closed by  MikeS
2012-05-11 07:48
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

Reports reports "fixed" in 0e5dd0a.

MikeS commented on 2012-05-09 09:37

I tested every ratio and haven’t heard “massive clicking noises”. Got the file or the file’s parameters for testing?

ETA: Additionally, I find it interesting you say “mostly gone” when using an older build. So….it IS there anyway.

rasferret commented on 2012-05-09 10:38

I’ve attached one file, but I think nearly every podcast I listen to seems to be affected independent of the codec. Normally I listen to the podcasts at 180%, 200%, 225% or 250% dependent of processing power (aac he) and understandability (the rest).
To be precise - I’ve just tested the archived build from 29.04.2012 - there are no clicks at any speed. This is the build just before introducing the new dsp algorithm.

rasferret commented on 2012-05-09 10:41

somethings wrong with attaching a file :-(

so here’s the link to the file:

http://mp3.podcast.hr-online.de/mp3/podcast/hr2_wissenswert/hr2_wissenswert_20120425.mp3

rasferret commented on 2012-05-09 10:42

by the way I am using a sansa clip+

saratoga commented on 2012-05-09 18:06

Could you attach your config file from the .rockbox folder on your player? Maybe the problem depends on certain combinations of settings.

rasferret commented on 2012-05-09 20:00

here you go…

   config.cfg (1.1 KiB)
rasferret commented on 2012-05-09 20:16

I’ve just recorded the beginning of the file played back by my clip+. You can clearly hear the clicking and poping noise in the background.

rasferret commented on 2012-05-09 20:19

oh you… :-( download limit…

   pop_click_test2.wav (1.72 MiB)
MikeS commented on 2012-05-10 02:07

I see what you mean. It just looks like I messed up in reporting the amount of source buffer consumed. I’ll get onto correcting that.

MikeS commented on 2012-05-11 01:58

Is 0e5dd0a ok?

rasferret commented on 2012-05-11 05:38

looks like… thanks.

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