The Yamaha AN1x Synthesizer mailing list

> I also had the popping problem, and I've noticed that it occurs 
when the 
> synth isn't 'warmed up yet' on patches with scene morping (both 
leds above 
> mod wheel) is turned on. 

My experience is similar. The popping  happened on cold days when the 
AN1X fired up on any patch with scene morphing. Morph patches could 
be played successfully, as long as the AN1X powered up to a patch 
that didn't have scene morphing. To solve the problem, none of my 
patches are stored as "scene morph" patches. I just toggle the scene-
morph on, after firing up the machine.

Haven't experienced any recurrence of the problem in the two years 
since I made the change. Hoping this works for you,

Jerry