3-19
Algorithms and Parameters
PCM 81
FEEDBACK/CROSS FEEDBACK
Parameters in this row provide level and phase setting for feedback
of individual voices, as well as a master feedback parameter for all
voices. In the Glide>Hall algorithm, a duplicate set of parameters is
included for cross-feedback.
Master
A Master Feedback control is available in effects with a feedback
level control for each voice. It allows the feedback level for all
voices to be simultaneously adjusted over a range of 0-100%.
Voices
In the 4-Voice algorithms, four voice controls are provided for
adjustment of the level and polarity of signals recirculated back to
the input of individual voices. Note that, as Voices 1 and 2 and
Voices 3 and 4 are paired, caution should be observed not to
create feedback within a pair which exceeds more than 100%.
In the Chorus+Rvb and M-Band+Rvb algorithms, six voice
parameters control the feedback level of the voice delays. Voices 1,
2, and 3 Fbk control the individual voice feedback levels from the
left channel voice delay outputs to the left channel delay feedback
input. Voices 4, 5, and 6 Fbk control the individual voice feedback
levels from the right channel voice delay outputs to the right
channel delay feedback input. The range of these parameters is
from +100% down to 1% (Phase Normal feedback), 0% (Off), –1%
up to –100% (Phase Inverted feedback).
In the Glide>Hall algorithm, the Feedback row provides both
Feedback and Cross Feedback parameters as described below. Press
Load/✱ at each row position to toggle between Feedback and
Cross Feedback parameters.
Mstr Fbk, Mstr X-Fbk
These parameters allow the feedback and cross feedback levels for
all voices to be simultaneously scaled over a range of 0-100%.
Voices 1-6 Fbk, X-Fbk
These parameters control the feedback and cross feedback levels
and the polarity of the voice delays.
Voices 1, 2, and 3 Fbk control the individual voice feedback levels
from the left channel voice delay outputs to the left channel delay
feedback input.
Voices 1, 2, and 3 X-Fbk control the individual voice feedback
levels from the left channel voice delay outputs to the right chan-
nel delay feedback input.
Voices 4, 5, and 6 Fbk control the individual voice feedback levels
from the right channel voice delay outputs to the right channel
delay feedback input.
Voices 4, 5, and 6 X-Fbk control the individual voice feedback
levels from the right channel voice delay outputs to the left
channel delay feedback input. The range of these parameters is
from +100% down to 1% (Phase Normal feedback), 0% (off), –1%
up to –100% (Phase Inverted feedback).
The sum of all Fbk and X-Fbk values for each channel should be less
than 100%.
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