Pittsburgh Modular Synthesizers Unveil the Voltage Lab 2: A Laboratory for Analog Sound Alchemy

The Voltage Lab 2 is introduced as Pittsburgh Modular’s latest foray into advanced analog synthesis, pitched as a complete laboratory for sonic experimentation. The video’s host, Richard Nichol, frames the instrument as a tool for those who want to push beyond the familiar, offering a fresh palette of tones and textures for adventurous patchers. The emphasis is on exploration—this is not just another monosynth, but a platform for discovering new sounds and workflows.

Pittsburgh Modular’s presentation style is, as always, focused on substance over flash. Rather than bombarding viewers with marketing jargon, the video lays out the Voltage Lab 2’s core mission: to provide a physical, natural, and alive sound that invites hands-on investigation. The instrument is positioned as a response to the ongoing relevance of analog synthesis, with its unique capabilities designed to appeal to those who value the tactile and unpredictable nature of voltage-controlled sound.

At the heart of the Voltage Lab 2 are two laboratory oscillators, each boasting newly developed wave shaping techniques that set them apart from typical analog fare. Oscillator 1 introduces a method called centre clipping, which, unlike traditional filters or wave folders that work from the peaks inward, reshapes the waveform from the middle out. This allows for independent control over the top and bottom of the wave, unlocking a range of timbres that feel both organic and unfamiliar. Additional parameters stretch and shift the waves, further expanding the harmonic palette.

Oscillator 2 brings its own flavour with pulse symmetry, adding a variable step between the top and bottom of the pulse wave to create staircase-like shapes and new flavours of pulse width modulation. The video also highlights a reflection function inspired by vintage Serge designs, which flips the bottom half of a waveform onto the top, resulting in unique transformations depending on the source wave. The interplay between the two oscillators is further deepened by options for ring modulation, bit crushing, frequency modulation, and bi-directional hard sync, all of which are demonstrated as tools for pushing analog sound into new territory.

Beyond the oscillators, the Voltage Lab 2 is kitted out with a full complement of synthesis modules designed to encourage experimentation. The system includes two function generators and two dynamics controllers, providing ample modulation and envelope shaping options for complex patches. There’s also a chance sequencer, which hints at generative and probabilistic sequencing possibilities, and a pair of analog effects to further sculpt the sound.

The video notes that these modules are joined by a collection of less obvious but highly useful tools, all aimed at covering a wide range of patching scenarios. The overall impression is of a system that doesn’t just cover the basics, but actively encourages users to push into new sonic territory. For those who want to craft the ultimate sonic experiment, the Voltage Lab 2 appears to offer a well-integrated toolkit.

Performance is a key focus of the Voltage Lab 2, with the Touch Controller 2 taking centre stage as the main interface for both traditional and experimental workflows. The controller features two channels—red and yellow—each with keyboard and sequencer modes. In keyboard mode, the pressure-sensitive touch pads can be set to a chosen key and scale, or assigned pitches via step knobs or chromatic mapping, offering flexibility for live play.

Sequencer mode ups the ante with step conditions, jumps, chance effects, and generative sequencing, allowing for intricate and evolving patterns. The blue CV channel controls gate length, envelope decay, and provides an unquantized CV output, adding another layer of modulation. Additional features include MIDI output, simultaneous quantized and unquantized outputs, scan inputs for voltage-controlled step selection, and the ability to use most functions simultaneously. The result is a controller that can weave a tangled web of complex interactions, yet the video assures us it’s easier to use than to explain.