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IDProjectCategoryView StatusLast Update
0000384OpenMPTPlayback Compatibilitypublic2013-04-29 15:14
Reportermrbumpy409 Assigned ToSaga Musix  
Status resolvedResolutionfixed 
Platformx86OSWindowsOS VersionXP
Product VersionOpenMPT (upgrade first) 
Target VersionOpenMPT (upgrade first)Fixed in VersionOpenMPT (upgrade first) 
Summary0000384: playback glitch in "The Search for Life" by AcidSoul (XM module)

In the XM module "The Search for Life" by AcidSoul, OpenMPT's playback sounds very strange in pattern 10, channels 1 & 2. Linked below is a .zip file containing comparison audio between FastTracker 2 and OpenMPT as well as the original XM module file. XMPlay's playback matches that of FastTracker 2. Disabling the FastTracker 2 compatible playback mode in OpenMPT doesn't solve the problem (it actually makes it worse).

Steps To Reproduce
  1. Download the zip file containing the XM module and test audio files:

  2. Open the XM module from the downloaded archive.

  3. Solo tracks 1 & 2.

  4. Play pattern 10.

TagsNo tags attached.
Has the bug occurred in previous versions?I don't know.
Tested code revision (in case you know it)


Saga Musix

Saga Musix

2013-04-28 17:00

administrator   ~0001225

Tremor should now be closer to FT2's behaviour.
For the reference:



2013-04-29 15:11

reporter   ~0001236

The tremor rhythm sounds correct now. The only difference I currently notice is that FastTracker II uses considerably more ramping with this effect. If I set OpenMPT to use 200 samples for ramping in and out, then this effect sounds identical to FastTracker II.

Saga Musix

Saga Musix

2013-04-29 15:14

administrator   ~0001238

Yes, FT2 uses an insanely long ramping slope (not only for tremor). There might be some kind of FT2 emulation mode that takes this into consideration at some point.

Issue History

Date Modified Username Field Change
2013-04-28 03:01 mrbumpy409 New Issue
2013-04-28 17:00 Saga Musix Note Added: 0001225
2013-04-28 17:00 Saga Musix Assigned To => Saga Musix
2013-04-28 17:00 Saga Musix Status new => feedback
2013-04-29 15:11 mrbumpy409 Note Added: 0001236
2013-04-29 15:11 mrbumpy409 Status feedback => assigned
2013-04-29 15:14 Saga Musix Note Added: 0001238
2013-04-29 15:14 Saga Musix Status assigned => resolved
2013-04-29 15:14 Saga Musix Resolution open => fixed
2013-04-29 15:14 Saga Musix Fixed in Version => OpenMPT (upgrade first)
2013-04-29 15:14 Saga Musix Target Version => OpenMPT (upgrade first)