User Manual

Using Ring Mod 1U as a VCA
Not every patch needs a ring mod, but most patches could benefit from another VCA. For this
reason, Ring Mod 1U can be pressed into service as a simple VCA when not performing ring
modulation duties.
1. Connect your audio signal to IN Y [2] .
2. Connect your modulation source (such as the output of an envelope or LFO) to IN X [1] .
3. Connect the RING OUT [3] jack to your audio mixer.
The CV signal patched into IN X controls the volume of the signal patched into IN Y — the
output of which appears at the RING OUT jack.
Calibrating the Ring Mod 1U
Ring Mod 1U is calibrated at the factory before shipping, so it’s unlikely you’ll ever need to perform
this procedure. However, if necessary, you can easily do it using only an oscillator (capable of
generating a simple, static waveform like a square wave) and an oscilloscope.
Here is the process:
1. Connect the output of an oscillator to IN X [1] . Square waves of approximately 1kHz work best.
You should also patch the oscillator through an oscilloscope in order to see the waveform that
you’re sending into the Ring Mod 1U.
2. Patch the RINGMOD OUT [3] jack into an oscilloscope so you can also view the output
waveform.
3. While monitoring the output on the oscilloscope, turn the trimmer on the back panel of the
Ring Mod 1U.
Ideally, the output should be as close to a flat line at 0V as possible. There may be some
transient spikes at the square wave crossing points, but the goal is to get as close as possible to
having no up/down stepping of the output voltage.
Ring Mod 1U Manual 7