Super cool!

That's great news! 8)

Very cool tool, had fun once I got it set up. Wouldn't work properly with 4.0+ skeletons, possibly related to the curves using doubles instead of integers.

I ended up just exporting the mouth as a 3.7 file and copying the keys over to the 4.1 skeleton.

Upon further testing it seems that a non-default timeline FPS was causing the issue, not the Spine version.

Help, please, when you press the animation button on Rhubarb-Lip-Sync Spine 2D, the rhubarb reaches six percent and no longer responds.

Help! Just got a file set up and I'm trying to do a test animation for some lipsync. I have all of the 6 basic mouth shapes in the rig, and Rhubarb seems to be detecting them correctly since it checkmarks the 6 slots for the mouthshapes, but when I got to animate the audio I get this error:

I'm using spine version 4.1.23 Pro, if that changes anything. Not sure what's going on, but any help would be appreciated.

Nevermind, I found this " "is not a valid Shape value" error fixed elsewhere. Looks like you have to have a G mouth shape as one of the defaults, not just A thru F. Was able to get past the error by adding a G shape to the rig.

Error processing file (the file path and name).
Error performing speech recognition via PocketSphinx tools.
Error creating speech decoder
Does anyone have any luck decoding this error with Rhubarb ?

I had a chance to use Rhubarb on stream and made a video showing the process here:

Thank you for the tool! It was very simple to use.