Hi, Tom,

I'm doing prototype board now, will do preview video when it's ready

But I think you did watch this, https://www.youtube.com/watch?v=Wqxp...LwQ_hg&index=4, it can already show how the TK60 mix engine rev up and rev down sound, and the smooth transit of sound. and will do more fine tuning, such as how the engine load affects engine volume, in next few month.

Other sound effect, such as
-Barrel elevation start
-Barrel elevation looping
-Barrel elevation stop
-Turret rotate start
-Turret rotate loop
-Turret rotate stop
They are already in Tk22.

Regards,
Clark