k-lfo

complex 'kæstle' LFO (micro-module)

This module is simply the 'rungler' LFO section from the Bastl Instruments Kastle modules (as found in the 3 wonkystuff kæstle modules OG, DRUM, and ARP). Since using one of the full-size modules just to use the LFO felt excessive, the micro-module was born.

Controls

• rate changes the lowest rate of the LFO;
• cv amt The LFO rate can be increased by introducing a CV (cv input below), and this knob controls how much of that CV influences the rate.

Connectivity

The LFO section of the *kæstle modules is reproduced entirely. Horizontal pairs of connections are 'local multiples', as you might want to send the signals to more than one place.

Inputs

• cv A voltage applied here will increase the rate of the LFO, depending on the cv amt control (above);
• bit Change the output of the sequence generated at the rungler output:
  • Disconnected: 16-step repeating pattern;
  • Connected to a low-level: 8-step repeating pattern.
  • Connected to high-level: Random pattern;
• clk A positive-going edge on this input will step the pattern output forward by one step. If the LFO rate is low, then it has no effect on the other LFO outputs - for higher LFO rates, the LFO output is reset to its start phase.

Outputs

Although the panel has graphical labels, they are listed here from top to bottom:

• square A simple square wave output;
• rungler A stepped, 'repeatedly chaotic' output, with 8 possible output voltages affected by the state of the bit input described above;
• triangle Triangle-wave output;

Further Info

More details on the internals of the LFO can be found in the user manual of the Kastle Drum.

Cheesy 'promo video' 😁

Since the code from this module is derived from the open-source kastle, the code and schematic is available from the wonkystuff github.

https://wonkystuff.co.uk/k-lfo.html