If you have a WAV instrument set up to play pingpong, loop, etc., you can delete all instances of the instrument except the first one and as long as your repeat is set to F, the synth will keep cycling through the frames without resetting.
I had no idea you could do this, this has literally changed my whole life!
I think a lot of people don't, especially considering LSDJ add the instrument back in even if you just change the note.
It works for anything on the WAV, including hand-drawn PWMs, wubs, whatever.
It works on the pulse and noise channels too. Say you're running a table on the pulse and you want to change the note without retriggering the table, just delete the instrument. Note changes, table (or envelope) continues uninterrupted.