Andrew, more testing of "many tracks (armed/disarmed), many plugins, shared plugins, gang modes, etc...?" and it seems like a really good fix. Will wait to hear back from Andrea too.

But there must be one more place that needs the same type of fix yet for GANG audio mode. This is currently working if you drag an audio plugin to a 2-channel audio track - that is, when you get back to regular mode you can see that the plugin is on both audio tracks. But when you have In/Out pointers and use the "attach effect" method instead, it only shows on the initial track.

i tried to add two more lines into mwindowedit.C

and for me I can select in/out points for two gang modes where sound tracks collapsed on timeline (with 6ch divx) and then use audio > attach effect for inserting effect and it propagates correctly

Andrea, you have to have both patches in: in_out_selection.diff AND in_out_selection-2.diff .

please also test main menu bar > video > atrach effect way..

On Friday, August 6, 2021, Andrea paz <gamberucci.andrea@gmail.com> wrote:

I confirm that the patch does not work. The In/Out points do not
create a valid region for "attach effect". It works instead, as
before, for the Drag&Drop effect from the Resources window.