SYNTHESIS TECHNOLOGY
PAGE 18
MOTM-510 ASSEMBLY 7/11/04
WWW.SYNTHTECH.COM
TUTORIAL SECTION
A Ring Modulator is a multiplier: the output can be written as:
Out = X * Y
where X and Y are the 2 input signals (sometimes referred to as the modulator and the
carrier). X and/or Y can be audio or DC signals. The output is simply the voltage X times the
voltage Y. This produces the sum of X and Y (X+Y) and the difference of X and Y (X-
Y)…Instead of the 2 RM inputs, the basic WaveWarper has 3: X, Y and Z. These are audio
inputs. The transfer function is
Out = X * (Y/Z)^m
OK, so let’s plug in some numbers to the MOTM-510 transfer function
. If we assume
Z
and
m
are
both one then we get
OUT = X * (Y/1)^1
which simplifies to
OUT = X * Y
which the minimally astute reader will recognize as the transfer function for a classic ring
modulator. So if we are understanding things correctly, the following patch should give us
some traditional-sounding RM:
VCO 1 SIN OUT -> 510 AUDIO Y (Y IN = 10, Y WARP = 10)
VCO 2 SIN OUT -> 510 AUDIO X (X IN = 10, X WARP = 10)
510 AUDIO OUT -> amplifier
1
, power switch = UNITY
Drive the VCO’s however you like, I use the MOTM-101 Sample & Hold module; detuning the
VCO’s shows off the nice RM effect of the patch.
1
I take the 510 AUDIO OUT to the MOTM-109 IN and the OUT of the 190 to my mixing desk. This allows me to
attenuate the output going to the desk. The signal in this patch is TOO HOT for my mixer’s inputs, and is probably too
hot for yours, too. Be careful! Also note that the FULL OUT can output up to 400 KHz; at high energy levels, you’re
bound to break something.
Summary of Contents for MOTM-510 The WaveWarper
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