OK, I now know 'what' but not 'why' :?
This is a pure AddSynth sound and the problem is with the Filter Envelope.
To get matching behaviour I have to reduce the Decay Value of Zyn to about 120
while Yoshi is at 127. Presumably Yoshi is doing some bad maths somewhere :(
I guess it could either be the parameter being set wrongly or the synth engine
wrongly interpreting the result.
--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.