The dynamic parameters of the RA701 are
controlled by the ENVELOPE section.
The DELAY control introduces a time lag between the trigger and the
Envelope Attack. It can produce flam effects on drums or repeat ef-
fects on keyboards. Envelope Delay also opens new possibilities in re-
verb processing (e.g. when gating snare reverb use Delay to produce a
burst of reverb say one beat after the snare).
The DEL LED gives a visual indication of the delay length.
The ATTACK control sets the time taken for the gate to open. Very fast
Attack times are usually needed for percussive sounds, whilst vocals or
low frequency sounds normally require a slower attack.
The ATK LED fades up as the gate attacks and remains on full while
the gate is open.
When the trigger source falls below threshold the gate will remain fully
open for a period set by the HOLD control and indicated by the HLD
LED. Use Hold when you want to preserve the natural decay of the sig-
nal.
After the Hold period the gate starts to close. The time taken to reach
full attenuation is set by the RELEASE control.
The DUCK switch inverts the envelope, so when the trigger source is
above threshold the gate attenuates. Most Ducking applications will use
an external trigger source, and require a reduced Range setting. (e.g.
Duck a music track a few dBs using a vocal or voice over channel as
trigger source.)
When the FIXED mode is selected the whole envelope is triggered
when the signal rises above threshold. i.e. Hold will follow Attack with-
out waiting for the signal to fall below threshold. This mode is useful
for processing tom-toms if they have a particularly loud ring, or reshap-
ing sampled sounds.
When operating the RA701 in STEREO the right channel Envelope and
Trigger controls are disabled and left channel acts as master controller.
