Dave Smith Instruments Prophet Rev2 - Page 54

! !
23
Prophet Rev2 User’s Guide
Filter
The description of envelope behavior just given is true when the amount param-
eter is set to a positive value. But since this control is actually bipolar, it is possible to
set a negative amount of modulation. In this case, the envelopes are inverted and their
behavior changes. The best way to get a feel for the difference is to experiment with
both positive and negative settings of the env amount parameter.
7KHFXWRIIIUHTXHQF\VHWWLQJPD\OLPLWWKHHIIHFWRIWKHHQYHORSHRQWKH¿OWHU)RU
H[DPSOHLQORZSDVV¿OWHUPRGHLIcutoff is at its highest setting, a positive envelope
DPRXQWZLOOKDYHQRHIIHFWRQWKH¿OWHUVLQFHWKH¿OWHULVDOUHDG\FRPSOHWHO\RSHQ
Velocity: 0...127²$OORZVNH\YHORFLW\WRLQÀXHQFH¿OWHUIUHTXHQF\,I
the amount is set to a positive value, the harder you play, the more the
¿OWHUZLOORSHQDQGWKHEULJKWHUWKHVRXQGZLOOEH&RQYHUVHO\LIVHWWRD
QHJDWLYHYDOXHWKHKDUGHU\RXSOD\WKHPRUHWKH¿OWHUZLOOFORVHDQGWKH
less bright the sound will be. This control makes for more touch-sensitive
sounds.
Key Amount: 0...127—Sets the amount of modulation from the
NH\ERDUGWRWKH¿OWHU¶VFXWRIIIUHTXHQF\$Q\VHWWLQJDERYH]HURPHDQV
WKDWWKHKLJKHUWKHQRWHSOD\HGRQWKHNH\ERDUGWKHPRUHWKH¿OWHURSHQV
This is useful for adding brightness to a sound as higher notes are played,
which is typically how acoustic instruments behave. When set to zero,
NH\ERDUG¿OWHUWUDFNLQJLVRIIPHDQLQJWKDW¿OWHUIUHTXHQF\LVXQDIIHFWHGE\
SOD\LQJKLJKHURUORZHUQRWHVRQWKHNH\ERDUG:KHQVHWWRWKH¿OWHU
will track in half-step increments (which can be useful if you are using
WKH¿OWHUWRJHQHUDWHDSLWFKWKURXJKVHOIRVFLOODWLRQLQSROHPRGH
Audio Mod: 0...127—Controls the amount of audio from Oscillator 1
XVHGWRPRGXODWHWKH¿OWHUFXWRIIIUHTXHQF\,WLVXVHIXOIRUDGGLQJDELW
of harmonic movement and high end sizzle to many sounds, especially in
SROH¿OWHUPRGHZLWKVRPH¿OWHUUHVRQDQFH
To create bell-like FM sounds with audio modVHWWKH¿OWHUWRSROHPRGHVHW
audio mod to 127, set osc mix to 127, set osc 2 shape to off, and set osc 1 shape to the
desired waveshape. Then turn resonance to 127 and experiment different osc 1 freq
WXQLQJV¿OWHUcutoff, and key amountVHWWLQJV$GMXVWWKH¿OWHUDQGDPSOL¿HUHQYHORSHV
as necessary.