View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001344||OpenMPT||Playback Compatibility||public||2020-06-27 15:37||2021-05-07 10:09|
|Reporter||WizArthur||Assigned To||Saga Musix|
|Product Version||OpenMPT 1.29.01.00 / libopenmpt 0.5.0 (upgrade first)|
|Target Version||OpenMPT 1.30 / libopenmpt 0.6 (goals)|
|Summary||0001344: Tuning issue in Impulse Tracker file with Amiga pitch slides|
The tuning of the portamentos in the melodies (starting at 0:30) of the attached song often go sharp of the target note. This issue has stumped me since '99 because it has played back differently in almost every player outside of IT. Best guess is that it is related to the Amiga pitch slides setting (in F12 settings), possibly combined with the high octave used for leads. It almost seems to go proportionally sharper with higher notes.
I recently tested this issue in Schism 20190801, ModPlug Player 1.46.02, XMPlay 3.8.4, and foo_openmpt54 0.5.0. Most players sounded similarly out of tune with only XMPlay getting close to IT.
The attachment includes the original IT file as well as a short clip with accurate pitch rendered using IT 2.14's stereo WAV writer.
|Tags||No tags attached.|
|Has the bug occurred in previous versions?||Yes|
|Tested code revision (in case you know it)|
watching.zip (479,154 bytes)
Amiga pitch slides in IT are indeed a bit weird and finnicky. It's been on my to-do list for a very long time to look into them and try to fix them...
Note to self: relevant sackit2 commit
Please give it a try, also with other formats because a lot of pitch slide logic was rearranged. I hope it didn't break anything!
There was a bug in the new code that stopped notes in some cases if tone portamento overshot the target note too much; this is now fixed in r14850.
|2020-06-27 15:37||WizArthur||New Issue|
|2020-06-27 15:37||WizArthur||File Added: watching.zip|
|2020-06-27 16:08||Saga Musix||Note Added: 0004390|
|2020-06-27 17:06||Saga Musix||Assigned To||=> Saga Musix|
|2020-06-27 17:06||Saga Musix||Status||new => assigned|
|2020-08-25 11:33||Saga Musix||Note Edited: 0004390|
|2021-05-02 14:58||Saga Musix||Target Version||=> OpenMPT 1.30 / libopenmpt 0.6 (goals)|
|2021-05-02 14:58||Saga Musix||Category||Player input plugins (xmp-openmpt, in_openmpt) => Playback Compatibility|
|2021-05-02 16:02||Saga Musix||Status||assigned => feedback|
|2021-05-02 16:02||Saga Musix||Note Added: 0004737|
|2021-05-07 10:09||Saga Musix||Note Added: 0004759|