Rockbox

This is the bug/patch tracker for Rockbox. Click here for more information.

Quick links: Bugs · Patches · Rockbox frontpage

Tasklist

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

Attached to Project: Rockbox
Opened by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 09:14 GMT+2
Last edited by Michael Sevakis (MikeS) - Friday, 11 May 2012, 09:48 GMT+2
Task Type Bugs
Category Music playback
Status Closed
Assigned To No-one
Player Type Sansa AMSv2
Severity Low
Priority Normal
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Private No

Details

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.
This task depends upon

Closed by  Michael Sevakis (MikeS)
Friday, 11 May 2012, 09:48 GMT+2
Reason for closing:  Fixed
Additional comments about closing:  Reports reports "fixed" in 0e5dd0a.
Comment by Michael Sevakis (MikeS) - Wednesday, 09 May 2012, 11:37 GMT+2
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.
Comment by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 12:38 GMT+2
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.
Comment by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 12:41 GMT+2
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
Comment by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 12:42 GMT+2
by the way I am using a sansa clip+
Comment by MichaelGiacomelli (saratoga) - Wednesday, 09 May 2012, 20:06 GMT+2
Could you attach your config file from the .rockbox folder on your player? Maybe the problem depends on certain combinations of settings.
Comment by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 22:00 GMT+2
here you go...
   config.cfg (1.1 KiB)
Comment by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 22:16 GMT+2
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.
Comment by Wolfgang Dilg (rasferret) - Wednesday, 09 May 2012, 22:19 GMT+2
oh you... :-(
download limit...
   pop_click_test2.wav (1.72 MiB)
Comment by Michael Sevakis (MikeS) - Thursday, 10 May 2012, 04:07 GMT+2
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.
Comment by Michael Sevakis (MikeS) - Friday, 11 May 2012, 03:58 GMT+2
Is 0e5dd0a ok?
Comment by Wolfgang Dilg (rasferret) - Friday, 11 May 2012, 07:38 GMT+2
looks like... thanks.

Loading...