bugslag - Bugs: bug #15845, irregular rythm

 
 

bug #15845: irregular rythm

Submitted by:  Alex Marandon <rhizome>
Submitted on:  Wed 22 Feb 2006 04:32:43 AM UTC  
 
Category: NoneSeverity: 4 - Important
Item Group: NoneStatus: Fixed
Privacy: PublicAssigned to: Alex Marandon <rhizome>
Open/Closed: ClosedOperating System: None

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Sat 18 Mar 2006 10:00:06 PM UTC, comment #4:

Audio data update is now scheduled by the playback thread. The update time is computed form the number of frames consumed by the audio driver.

Alex Marandon <rhizome>
Project AdministratorIn charge of this item.
Tue 07 Mar 2006 09:06:54 AM UTC, comment #3:

The update should be scheduled for each pad when it reaches the update time, not only the first one.

Alex Marandon <rhizome>
Project AdministratorIn charge of this item.
Tue 07 Mar 2006 08:59:58 AM UTC, comment #2:

Ideas to solve this problem :

- follow advice for using JACK : the process callback shouldn't call functions likely to block for a long time as explained at http://jackit.sourceforge.net/docs/reference/html/jack_8h.html#a8
- audio data update should be scheduled by the playback thread (time tick being based on audio driver) but not executed in this thread. We may use a separate thread waiting for a wait condition mofified by the playback thread

Alex Marandon <rhizome>
Project AdministratorIn charge of this item.
Wed 22 Feb 2006 03:39:31 PM UTC, comment #1:

The irregulatity seems to be proportinal to libao or JACK buffers size. The bigger the buffer is, the more inaccuratly the rythm is rendered.

Alex Marandon <rhizome>
Project AdministratorIn charge of this item.
Wed 22 Feb 2006 04:32:43 AM UTC, original submission:

The rythm played back is not very accurate. This is particulary obvious at fast tempo.

Alex Marandon <rhizome>
Project AdministratorIn charge of this item.

 

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Follow 5 latest changes.

Date Changed By Updated Field Previous Value => Replaced By
Fri 12 May 2006 12:58:21 PM UTCrhizomeOpen/ClosedOpen=>Closed
Thu 20 Apr 2006 01:19:14 PM UTCrhizomeStatusWorks For Me=>Fixed
Sat 18 Mar 2006 10:00:06 PM UTCrhizomeStatusConfirmed=>Works For Me
Wed 22 Feb 2006 04:34:54 AM UTCrhizomeStatusNone=>Confirmed
Wed 22 Feb 2006 04:33:03 AM UTCrhizomeSummaryirregularities rythm restitution=>irregular rythm

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