©2015 - Compiled by Robert Anselmi
for full manual
Make Noise Maths
Function Module
Maths
is an analog computer designed for musical purposes. Amongst other things, it can: 1. Generate a variety of linear, logarithmic, or exponential triggered
or continuous functions 2. Integrate an incoming signal 3. Amplify, attenuate and Invert an incoming signal 4. Add, subtract and OR up to 4 signals 5. Generate
analog signals from digital information (Gate/ Clock) 6. Generate digital information (Gate/ Clock) from analog signals 7. Delay digital (Gate/ Clock) information.
If the above list reads like science rather than music, here is the translation: 1. Voltage Controlled Envelope or LFO as slow as 25 minutes and as fast as 1khz
2. Apply Lag, Slew or Portamento to control voltages 3. Change the depth of modulation and modulate backwards! 4. Combine up to 4 control signals to create
more complex modulations 5. Musical Events such as Ramping up or Down in Tempo, on command 6. Initiating Musical events upon sensing motion in the
system 7. Musical note division and/ or Flam.
CHANNEL 1
IN:
DC input
to circuit. Use
for lag, porta-
mento, or ASR
envelopes.
Also input to
SUM
/
OR
bus.
Range: +/-10V.
CHANNEL 4 IN:
DC input to
circuit. Use for lag, portamento,
or ASR envelopes. Also input to
SUM
/
OR
bus. Range: +/-10V.
CHANNEL 2 IN:
DC input to
attenuvertor and
SUM
/
OR
bus.
Normalized to a +10V refer-
ence for generation of voltage
offsets. Input Range: +/-10V.
CHANNEL 3 IN:
DC input to
attenuvertor and
SUM
/
OR
bus.
Normalized to a +5V reference
for generation of voltage off-
sets. Input Range: +/-10V.
CYCLE BUTTON & LED:
Causes the
circuit to self cycle, generating a repeating
voltage function, aka LFO. Use for LFO, clock,
or VCO. The associated LED displays red
when the cycle is enabled.
TRIG IN:
Gate or pulse at input
triggers the circuit regardless of
Signal In activity. Result is a 0V -
10V function (envelope), whose
characteristics are defined by the
Rise
,
Fall
, and
Vari-Response
parameters. Use for envelope,
pulse delay, clock division, LFO
Reset (only during falling portion).
RISE ROTARY & CV IN:
The rotary sets
the time it takes for the voltage function to
ramp up. CCW roation decreases rise time,
while CW rotation increases rise time. CV In
is the linear CV input for the
Rise
parameter.
Positive CV signals increase rise time, nega-
tive CV signals decrease rise time, with re-
spect to the
Rise
rotary setting. Range: +/-8V.
FALL ROTARY & CV IN:
The rotary Sets
the time it takes for the voltage function to
ramp down. CCW rotation decreases fall
time, while CW rotation increases fall time.
CV In is the linear CV signal input for the
Fall
parameter. Positive CV signals increase fall
time, while negative CV signals decrease fall
time, with respect to the
Fall
rotary setting.
Range: +/-8V.
BOTH CV IN:
Bi-Polar Exponential CV
signal input for entire function. Positive CV
signals decrease total time while negative CV
signals increase total time. Range: +/-8V.
CYCLE IN:
On gate high, circuit will cycle.
On gate low, the circuit will not cycle (unless
the
CYCLE button
is engaged). Requires
m2.5V for high.
CHANNEL NOTE:
Channel 1 & 4 are identical, except for
EOR
/
EOC
. So only Channel 1 (
in
Green
), and any differences, are explained below. Channel 4 Input is shown below, for reference.
VARI-RESPONSE ROTARY:
Sets the
response curve of the voltage function.
Response is continuously variable from
Logarithmic through Linear to Exponential to
Hyper-Exponential. The tick mark shows the
Linear setting.
EOR (END OF RISE OUT) & LED:
Goes
high at the end of the rise portion of the func-
tion. 0V or 10V. The associated LED indicates
the states of the EOR output. Lights when
EOR is high.
EOC (END OF CYCLE OUT) &
LED:
Goes high at the end of the fall
portion of the function. 0V or 10V. The as-
sociated LED indicates the states of the
EOC output. Lights when EOC is high.
CHANNEL 1 ATTENUVERTOR
ROTARY:
Provides for scaling, attenu-
ation and inversion of the signal being
processed or generated by channel 1.
Connected to
Channel 1 Variable Out
and
SUM
/
OR
bus.
CHANNEL 4 ATTENUVERTOR
ROTARY:
Provides for scaling, attenu-
ation and inversion of the signal being
processed or generated by channel 4.
Connected to
Channel 4 Variable Out
and
SUM
/
OR
bus.
CHANNEL 2 & 3 ATTENUVER-
TOR ROTARIES:
Provides for scaling,
attenuation, amplification, and inversion
of the signal patched into Channel 2 or 3.
Connected to
Channel 2
/
3 Variable Out
and
SUM
/
OR
bus.
UNITY SIGNAL
OUT & LED:
Signal from the
Channel 1 circuit. 8V
peak to peak when
cycling. Otherwise,
the output follows
the amplitude of the
input. The associ-
ated LED indicates
activity within the
circuit. Positive volt-
ages display green,
while negative volt-
ages display red.
SUM BUS LEDS:
Indicates voltage activity in the
SUM
bus (and therefore the
INVerted SUM
as well). A red
LED indicates negative voltages. A green LED indicates positive voltages.
OR BUS
OUT:
Result
of the Analog
Logic OR
function with
respect to
the settings
of the
At-
tenuvertor
rotaries
for
channels 1,
2, 3 and 4.
Range: 0V to
10V.
SUM BUS
OUT:
Sum of the
applied volt-
ages with
respect to
the settings
of the
At-
tenuvertor
rotaries
for
channels
1, 2, 3 and
4. Range:
+/-10V.
INV BUS OUT:
Signal from
SUM Out
turned upside down. Range: +/-10V.
MATHS
is laid out top to bottom, with
symmetrical features between Chan-
nel 1 and Channel 4.
The signal inputs are at the top,
followed by the panel controls and
control signal inputs at the middle.
The signal outputs are at the bottom
of the module. LEDs are placed near
the signal they are indicating.
VARIABLE OUTS:
The applied signal,
as processed by channels 1, 2, 3, or 4
controls. Normalized to the
SUM
and
OR
busses. Inserting a patch cable will
remove the signal from the
SUM
and
OR
busses. Output range: +/-10V.
Maths Tips & Tricks
●
Longer cycles are achieved with more Log. response curves. The fastest, sharpest functions are achieved with extreme Exp. response curves.
●
Adjustment to the response curve will affect
Rise
and
Fall
times.
●
To achieve longer or shorter
Rise
&
Fall
times than available from the Rotaries, apply a voltage offset to the CV Signal Inputs. Use Ch.2 or 3 for this.
●
Use the
INV SUM Out
where you require reversed modulation but don’t have means for inversion at the CV destination (ex.: Mix CV In on Echophon).
●
An
INV
signal from Maths back into the Maths at any CV input is useful for creating responses not covered by the
Vari-Response rotaries
alone.
●
When utilizing the
SUM
and
OR
outputs, set any unused Ch. 2 or 3
Attenuvertor Rotaries
to Noon, or insert a dummy patch cable into the associated
channel Input. This will avoid unwanted offsets.
●
The
OR
output will not respond to, or generate, negative voltages.
●
The
EOR
and
EOC
are useful for generating complex CV functions where Ch. 1 and Ch. 4 trigger from each other. Patch to each other’s
Trigger
,
Signal
, and
CYCLE
inputs.
