Final update for anyone searching the archive:
Screen-capture was causing the delay.
I was revisiting this older patch and realized that I was attempting to capture the gemwin output with my old computer. That caused the video rendering to be later than the audio. Specifically, I was using a [gemhead] to bang [pix_snap] at full resolution.
My solution was to stop using an external MIDI sequencer, instead using [seq], and then transferring the files to a more powerful Windows 10 computer that has built-in X-box screen capture with Win-G.
In the end there was still latency (about 1600ms) that might be my fault between creating the audio and MIDI files. So, I just put a little delay on the audio.
Sam
Update:
It seems to happen when Gem ver: 0.93.3 is activated. DSP is not turned on. Maybe, I'm just asking too much of my MacBook Pro from 2009?
Sam