SYN
ATUNE
BFM T
CFM D
DDEC
EFM A
FNDEC
GNLEV
HOVER
This panel is live — click keys to operate it. [FUNC] toggles the second layer, [TRK] then a trig key switches track, parameter-page keys cycle their pages, [UP]/[DOWN] browse, encoders inspect parameters.
FM DFM Decay TimeSYN · knob C · sd_fm
sets the decay time of the second (modulating) oscillator and, consequently, the decay time of the FM effect.