Castor & Pollux

To use this editor:

Connect your Castor & Pollux to your Eurorack power supply. The module must be powered by the Eurorack power supply.
Connect a USB cable from your computer to Castor & Pollux's USB port. It's located on the right side of the module on the bottom circuit board.
Click the connect button below, and when prompted, allow the page access to your MIDI devices.
Once connected the editor will appear and load the current settings from your device.
Once you're done editing, click the save & restart button at the bottom of the editor.
Saving should automatically reset your module, but, if you don't see the changes take effect then try restarting your module. You can do this by turning it off and back on or by pressing the small reset button that's right beside the USB port.

Note

This editor uses WebMIDI to communicate with Castor & Pollux. It works in Google Chrome, Microsoft Edge, and Opera (full list of supported browsers).

If you run into issues, feel free to reach out.

Settings

LED brightness percent

The higher the brightness, the more power the module will consume. At maximum brightness, it consumes 130mA from the +12V rail.

Base pitch CV offset octaves (volts)

This setting effectively determines the starting note for the module since the pitch CV input and offset knobs are added to this value to determine the final pitch CV. By default, it's 1.0.

Castor pitch knob minimum octaves (volts) Castor pitch knob maximum octaves (volts) Pollux pitch knob minimum octaves (volts) Pollux pitch knob maximum octaves (volts)

These settings determine the pitch offset knob's range for each oscillator. By default, they have a range of about -1 to +1 octaves (volts). The value of the pitch offset knob is added to the pitch CV input. Note that because the module's ADC isn't perfect, the knobs don't quite reach 100% of their range. You may need to nudge these to give the knob some headroom.

Pitch knob non-linearity percent

The firmware adjusts the pitch CV knobs so that it's easier to tune the oscillators. It does this by spreading the values near the center of the knob out so that the range at the center is more fine. This makes the knobs non-linear. This setting controls how "intense" that non-linearity is. 33% is equivalent to a linear response. Higher values make it easier and easier to tune the oscillator but sacrifices the range, values lower than 33% will make it harder to tune and aren't recommended. This is 60% by default.

Quantization Enable Castor's semitone quantization

When nothing is patched into Castor's pitch CV input, Castor's pitch knob becomes a coarse pitch knob that sweeps across 6 octaves. By default, in this situation Castor will quantize to the nearest semitone. You can disable this to get continuous frequency changes.

Jack detection Enable pitch jack detection Zero detection threshold code points

These settings determine how C&P detects the presence or absence of a signal at the pitch CV jacks. C&P does this by checking if the signal at the jack is 0V.

The intended behavior is that when no cable is patched to Castor's pitch input, it'll switch to "coarse" pitch behavior. Likewise for Pollux, if there's no cable patched to its pitch input then it will follow Castor. However, some users may find this behavior undesirable, especially if you often send pitch CV of around 0V.

Chorus maximum intensity percent

LFO frequency hertz

This setting controls the default frequency of the internal LFO. This LFO is used by the chorusing feature and the PWM feature. The frequency can be changed anytime by holding the hard sync button and moving the chorusing amount (φ) knob, this just sets the frequency at start-up.

LFO waveform

Shape 1 Amplitude

Shape 2 Amplitude Frequency ratio

Pulse width behavior

Danger zone

These settings are calibrated during assembly and do not have default values. Changing these settings can cause your module to behave incorrectly, so do not touch them unless you know what you're doing or have been asked to do so by support. It's highly recommended that you write down these settings before making changes in case you need to restore them.

I understand, let me in!

Monitor

This is an advanced debugging tool. You shouldn't even see this unless you know what you're doing!

monitor output

Ramp calibration

Output will appear here

Device info

Settings

Danger zone

Monitor

Ramp calibration