Vox DA15 Owner's Manual page 22

FLANGER
A model of a truly classic flanger that "unchained" a highly influential modern guitarist
who many hail as the "godfather of two-handed tapping."
TAP
EDIT 2
[TAP+EDIT 1]
EDIT 3
[BYPASS+EDIT 1]
TREMOLO
This effect is based on the highly acclaimed tremolo circuit found in some guitar amps.
TAP
EDIT 2
[TAP+EDIT 1]
EDIT 3
[BYPASS+EDIT 1]
ROTARY
This models a rotary speaker.
TAP
EDIT 2
[TAP+EDIT 1]
EDIT 3
[BYPASS+EDIT 1]
22
"SPEED" Sets the modulation speed in a range of 0.1...10 [Hz].
"SPEED" This lets you use the knob to make fine adjustments
to the parameter.
"RESONANCE" Adjusts the amount of resonance.
"SPEED" Sets the tremolo speed in a range of 2.5...10 [Hz].
"SPEED" This lets you use the knob to make fine adjustments
to the parameter.
"DEPTH" Adjusts the tremolo depth.
"SPEED" Sets the rotational speed of the speaker in a range of
0.8...10 [Hz].
"SPEED" This lets you use the knob to make fine adjustments
to the parameter.
"SENS" By adjusting this parameter you can make the rota-
tional speed change automatically in response to the
volume of your guitar. If you use this function, set the
SPEED to a slow setting.