midi program changes fail with certain vst plugins

[devloop0123]

I am not sure if it is a plugin or MusE issue, but here goes:

In MusE, I have a couple of vst plugins which do not seem to receive, or react to, midi program change messages:

TAL Bassline 101
ShowMIDI

Other vst plugins do react to program changes, eg:

Dexed
Pianoteq
OB-Xd

Both the TAL Bassline and ShowMIDI vst's do work correctly in Qtractor and Carla standalone.

The Showmidi LV2 works correctly, but TAL Bassline has no LV2 version.

(Program changes seem to be the only way to change patterns of TAL Bassline, where every pattern must be saved under a different preset.)

MusE version: latest git compiled from source.

[farvardin]

@devloop0123 you've saved me to open a new issue, I've experienced the same, from latest git compiled from source.

I've seen that on the S-YXG50 VSTi, and I was suspecting it was an issue from the VST. So to be able to change the XG instruments (program changes is also the only way to use this VST) I've called it from an external Carla plugin host, it's working fine.

Today I've tried something similar with the ADLplug VST and LV2 and it's not working, unless I call it from an external application like Carla. Within MusE it's not changing the programs.

I can confirm some other plugins inside MusE are receiving prog changes correctly, such as Calf Fluidsynth

[farvardin]

@devloop0123 for tal bassline, was it loaded from within a carla started from Muse? It seems Ardour is experiencing a similar behavior, with for example Muse or ardour loading carla loading s-yxg50 vst. But it works fine from muse or ardour calling carla standalone.