The Chopper Multiplier, a creation from Nonlinear Circuits (NLC), rectifies Harald Bode's statement from his now famed article; he asserted that switching type or chopper type multipliers are ill-suited for use in modular synths. The Chopper Multiplier silences such assertions, providing a switching-type multiplier that not only functions gracefully within the framework of a modular synth but also breeds a broad spectrum of intriguing control voltage (CV) signals.
A singular piece of hardware, the Chopper Multiplier houses two independent multipliers on one PCB. Inputs from the first multiplier are switched and subsequently fed into the one beneath, allowing for a myriad of patching opportunities while simultaneously conserving valuable rack space. Furthermore, the outputs from both multipliers are ingeniously routed to the switches of the inputs for the 'Passive aggressive XOR', creating a fusion of sound that's as provocative as it is pleasing.
While using the Chopper Multiplier, it’s worth noting one of its delightful quirks - the inclusion of input marked SW on the panel. Although traditionally a slot for pulse signals, NLC encourages users to throw conformity to the wind and experiment with a variety of signal types. The switching multiplier has an affinity for Control Voltage (CV) signals, exhibiting a knack for churning out enchanting envelopes and audibly enticing intricacies. Await the charming appearance of steps or gaps when observed via a scope, akin to the auditory version of pointillism, influenced by the inherent V-on found in diodes and FETs.
Investigating the Chopper Multiplier opens up a realm of possibilities for modular enthusiasts. Breaking down the walls built by Bode, it reveals the potential concealed within chopper type multipliers. It’s an invitation to dive into its rich sonic palette, conjuring up intricate layers of soundscapes and opening new frontiers of artistic discovery.
A stern reminder though - while NLC is the maternity ward for such unique modules, it no longer deals in assembled modules. However, there's a vast network of builders worldwide who have taken up the mantle to provide assembled NLC modules. Delve into the world of the Chopper Multiplier and unlock the dynamic envelopes it offers. It’s sure to be a rousing adventure for both the ears and the mind, all courtesy of the humble modular synth.
Example Usage
Suppose you are a novice-level user of the Chopper Multiplier Eurorack module. Here's an example of how you can use it to unlock dynamic envelopes in your modular synth setup:
- Start by connecting your Chopper Multiplier module to your modular system using patch cables. Ensure it has power and is properly integrated into your setup.
- Take an LFO (Low-Frequency Oscillator) module and connect its output to the "SW" input of the Chopper Multiplier. The LFO will provide a pulsating signal that drives the Chopper Multiplier.
- Now, take another module that generates an interesting audio or CV signal, such as a VCO (Voltage-Controlled Oscillator) or an envelope generator, and patch its output to one of the inputs of the Chopper Multiplier.
- Take the output of the Chopper Multiplier and connect it to a sound module or any other destination you desire, such as a VCA (Voltage-Controlled Amplifier) or a filter module.
- Experiment with adjusting the parameters of the Chopper Multiplier module. You can try manipulating the pulse width of the LFO to control the "chop rate" or the speed at which the modulation occurs.
- Notice the dynamic envelopes that the Chopper Multiplier generates. As the LFO's pulse signal interacts with the input signal, you'll hear variations in the amplitude, timbre, or other characteristics of the sound.
- Feel free to explore other possibilities by patching different modulation sources and destinations into the Chopper Multiplier. You can use other LFOs, envelopes, or even control voltages to create complex and evolving modulation patterns.
Remember, the Chopper Multiplier is ideal for creating interesting envelopes and modulation effects in your modular synthesizer. Embrace experimentation and let your creativity run wild with this powerful module!
Intermediate Usage Example:
One interesting way to unlock the dynamic envelopes of the Chopper Multiplier module is by using it in conjunction with a sequencer. Let's say you have a sequencer generating a sequence of 8 steps, controlling pitch values on another module. By patching the output of the sequencer into the SW (switch) input of the Chopper Multiplier, you can create unique and evolving envelopes for each step of the sequence.
Start by connecting the sequencer's output to the SW input of the Chopper Multiplier. The SW input expects a pulse signal, which the sequencer can generate. Next, connect the output of the Chopper Multiplier to the VCA or another module that you want to modulate.
Now, as the sequencer steps through the sequence, each pulse signal will trigger the Chopper Multiplier to generate a dynamic envelope. The Chopper Multiplier's inherent gaps or steps will add an interesting and unpredictable character to the envelopes.
To further shape and manipulate the envelopes, you can experiment with patching other modulation sources into the AM (Amplitude Modulation) input of the Chopper Multiplier. For instance, connecting an LFO or an envelope generator to the AM input will introduce additional movement and variation to the envelopes.
By combining the sequencing capabilities of a sequencer module with the dynamic envelope generation of the Chopper Multiplier, you can create complex and evolving rhythmic patterns with just a few patch cables. This technique is especially useful when you want to introduce subtle variations and unpredictability to your sequences, adding depth and interest to your compositions.
Remember, experimentation is key when working with modules like the Chopper Multiplier. Don't be afraid to try different modulation sources, patching configurations, and tempo settings to discover unique and inspiring sounds. Happy patching!
Further Thoughts
One expert-level usage example for the Chopper Multiplier Eurorack module is utilizing it to create dynamic envelopes for a percussive sound.
To begin, patch a trigger signal into the "SW" input of the Chopper Multiplier. This trigger signal can come from an external sequencer or any other rhythmic source. Adjust the trigger's timing and intensity to achieve the desired percussive effect.
Next, connect an envelope generator, such as the classic ADSR module, to the Chopper Multiplier's "X" input. This will modulate the amplitude of the percussive sound.
To add more complexity to the envelope, use another envelope generator or LFO to modulate the Chopper Multiplier's "Y" input. Experiment with different modulation shapes and rates to create unique and evolving percussive sounds.
The Chopper Multiplier's output can be connected to a VCA or directly to a sound source. By adjusting the Chopper Multiplier's controls, such as "Offset" and "Scale," you can further shape the dynamics and characteristics of the resulting envelope.
Don't forget to explore the interaction between the Chopper Multiplier and other modules in your Eurorack system. For instance, using a voltage-controlled filter after the Chopper Multiplier can create even more intricate and expressive percussive textures.
By leveraging the Chopper Multiplier's switching or chopper characteristics, you can unlock a world of dynamic envelope possibilities in your modular synth setup, adding excitement and movement to your music.