12
13
Per-Tap rhythm Delay Parameter editing
The “TAP EDIT” buttons allow the setting and display of the per-tap parameters. The per-tap parameters are as
follows:
●
MUTe
Mutes/un-mutes the selected tap. When muted, the output for that tap is removed from the rhythm
delay output sum.
●
LeveL
Adjusts the gain applied to the tap output before summing with the other taps. The range of values is
0 to 15, with the corresponding gains increasing exponentially (so that, for example, the gain increases more
from value 14 to 15 than it does from 1 to 2). A value of 0 will set the gain to zero, effectively muting that tap.
Every tap that has a gain of more than 0 will have its corresponding tap# LED lit up (these are the numbered
LEDs in the upper left hand part of the module). This provides a convenient way to see which taps are active,
and contributing to the rhythm delay output.
●
PAN
The action of this parameter setting depends on the module’s configuration (STEREO or MONO). In the
stereo configurations, it acts as a
balance
control, while in the mono configurations it acts as a
pan
control.
The range of values is from 7L (panned fully left, or balanced so that just the left channel comes through)
through 0 (panned to center, or balanced so that both the left and right channel are at full level), to 7R
(panned fully left, or balanced so that just the left channel comes through).
●
CUT
Adjusts the cutoff frequency of the tap’s multimode filter. The range of values is from 0 to 4095. These
values are approximately equal to the cutoff frequency in Hertz. When the tap filter is configured as a
lowpass filter, then the frequencies above the cutoff frequency will be attenuated. Conversely, When the tap
filter is configured as a highpass filter, then the frequencies below the cutoff frequency will be attenuated.
When configured as a bandpass filter, the frequencies above AND below the cutoff frequency will be
attenuated. When the filter type is set to None, the filter is bypassed and the CUT setting has no effect.
Pushing on the encoder while rotating it will change the CUT value in larger increments, to speed up going
from one cutoff frequency setting to another.
●
Q
Adjusts the resonance (or Q) of the tap’s multimode filter. There is a range from 0-15 for the Q value.
Higher values give higher filter Q. At high Q values the filter will strongly emphasize those frequencies near
the filter’s cutoff frequency. The filter is easily overdriven at high Q values leading to distortion. This can be a
useful effect, but if it is undesired, the input level should be reduced.
●
TYPe
Allows the tap’s multi-mode filter to be configured as either - None (in which case there is no filtering
applied), Lowpass, Bandpass, and Highpass.
●
PiTCH sHifT
The pitch of the selected tap’s output is shifted by a multiple of semitones. The range is from
-16 to +15 semitones. Negative values will shift the pitch to lower frequencies while positive values will shift
the pitch higher.
●
DeTUNe
This parameter is accessed by pressing the PITCH SHIFT button a second time. The DETUNE is
a small (less than 1/2 a semitone) pitch shift. It is added to the pitch shift amount set via the PITCH SHIFT
button.
Figure 4.
Delay line read pointer behaviour when “reverse” is activated.
x
delay line input time
dela
y line output time
reverse on
reverse off
T_feedback
Reverse Mode Operation
●
Ping-Pong
When displaying the TAP# (11) or SLIP (12) edit pages, the PING-PONG state can be toggled
on or off. This is done by pressing the rotary encoder. When PING-PONG is turned on, a little crossed-arrows
icon will appear to the right of the FEEDBACK label on the top line of the display, as shown in the figure below.
When PING-PONG is turned on the LEFT and RIGHT feedback channels are swapped. That is, the LEFT channel
of the feedback tap output is fed back into the RIGHT channel of the rhythm delay input, and vice-versa. In
this way a bouncing of echoes from side to side can be obtained.
Figure 5. LEFT: The TAP# edit display when Ping-Pong is OFF. RIGHT: The TAP# edit display when Ping-Pong is ON.