Looking at the realm of oscillators and filters, it's hard not to marvel at the ingenuity behind the Fast and Bulbous VCF/Phaser module by Nonlinearcircuits. This distinctive module is coined after the SSI2140 chip, though it packs a few updates inspired by the SSM2040 VCF chip. A striking feature is its dual functionality, allowing users to switch effortlessly between a phaser and a voltage-controlled filter (VCF).
The idea to design a module that could transition between a phaser and a VCF originated from the intriguing properties of SSM2040 designs. Notably, such designs caught the attention of T. Henry, J. Blacet, and C. Anderton, among others. However, the Fast and Bulbous module design draws heavily from Anderton's design in Device 1-6 while being tweaked to suit the SSI2140 and Eurorack modules.
The module is built with four switches, each connected to an OTA stage. This allows the user to select between all-pass (phaser) and low-pass filter modes. The beauty lies in the blended sounds created by having a mix of switches in one mode and a few in the other. So, whether veering towards a phaser or a low-pass filter, the module promises an exciting playground for sound explorers.
A dry mix pot further amplifies creativity by giving the user the option to mix incoming signals into the OUT signal. This signal is sourced from the 4th OTA stage. The feature is typically used in Phaser mode, but in keeping with the liberating spirit of sound synthesis and design, there are no set rules against using it as one desires.
Completing the outstanding features of the Fast and Bulbous module is the POLES feature. This element serves as a weighted mix of the outputs of each pole. While it may seem a tad bit shy when all switches carry on in Low Pass mode, it shoots up enthusiastically when one or more switches are turned to Phaser.
In essence, the Fast and Bulbous VCF/Phaser module by Nonlinearcircuits stands as an intriguing addition to the oscillator and filter category in Eurorack modules. Its clever design and versatile features make it a go-to tool for sound designers and audio processing enthusiasts. Offering a unique blend of traditional ideas with contemporary updates, it invites a broad range of creative expressions, whether they be conventional or experimental. This module reminds us of the boundless exploration and synthesis possibilities within the Eurorack realm.
Example Usage
To begin exploring the Fast and Bulbous VCF/Phaser module by Nonlinearcircuits, it's essential to grasp its fundamental capabilities. Designed with flexibility, this dual-functionality module swiftly switches roles between a phaser and a voltage-controlled filter (VCF).
For a novice setup, first connect an oscillator's output to the module's input jack. This will provide the raw sound that you'll be sculpting. The module features four switches, allowing you to select between all-pass (phaser) and low-pass filter modes for each of the OTA stages. Start by experimenting with all switches in the low-pass mode to achieve a traditional filtering effect, perfect for removing higher frequencies from your sound source.
As you become comfortable, gradually engage one or two stages in the phaser mode. This action begins to infuse movement and depth into the sound, producing a distinct phasing effect characterized by sweeping resonances. With each toggle change, observe how the sound alters, gaining a blend of both filtering and phasing characteristics.
The dry mix pot is a valuable tool in your exploratory sessions. It blends the original signal with the processed one. In phaser mode, turning the dry mix pot allows for subtle to intense phasing effects, creating lush sweeps when modulation sources such as LFOs are applied.
Finally, the POLES knob serves as a fascinating feature to explore. It mixes outputs from each pole, offering a spectral shift that comes alive when the module operates in phaser mode. Toggle some switches to the phaser and listen as POLES transforms the sound, ensuring it's lively and dynamic.
Approach the Fast and Bulbous with an open mindset; part of the magic lies in the discovery of new textures as each switch toggles and each knob twist offers a fresh soundscape opportunity. Let your ear guide you as you blend traditional filtering with dynamic phasing, crafting unique audio experiences within your modular setups.
When exploring the 'Fast and Bulbous' VCF/Phaser module by Nonlinearcircuits, understanding its dual functionality can unlock a myriad of creative possibilities in your sound design. This module's ability to toggle between a VCF and a phaser by utilizing the SSI2140 chip presents a unique opportunity to manipulate audio signals in ways that are both innovative and versatile.
To begin with, the configuration of the four switches—each responsible for toggling one OTA stage between all-pass (phaser) and low-pass filter modes—allows for intricate combinations that can drastically alter your sound output. One recommended exercise is to experiment by setting two switches in phaser mode and the other two in filter mode. This particular setup creates a rich, dynamic sound that capitalizes on the contrasting characteristics of both filtering and phasing.
In addition to the switch settings, the dry mix pot plays a crucial role in blending the original signal with the processed signal from the fourth OTA stage. While this feature typically comes into play when utilizing the phaser mode, it provides creative flexibility regardless of the configuration. For example, subtly mixing the dry signal with a predominantly filtered sound can yield nuanced textures that add depth and interest to your patches.
Furthermore, the POLES feature on the module, which generates a weighted mix of the outputs from each pole, provides another layer of sound design potential. When all four switches are in low-pass filter mode, the output may come across as more subdued. However, flipping at least one switch to phaser mode can invigorate the output, introducing pronounced modulations and movement within the sound. This dynamic response can be particularly effective for creating evolving soundscapes or adding rhythmic interest to more static audio passages.
For intermediate users, the key to mastering this module lies in the thoughtful combination of its switch settings, control over the dry/wet mix, and utilizing the POLES output strategically. By understanding these interactions, the 'Fast and Bulbous' VCF/Phaser module becomes more than just a utility; it transforms into a powerful sound-shaping tool that enhances your creative endeavors within the Eurorack ecosystem. Keep experimenting and let the dual nature of this module inspire unconventional approaches to your modular synthesis.
Further Thoughts
The Fast and Bulbous VCF/Phaser module by Nonlinearcircuits stands out not only because of its heritage, drawing inspiration from classic SSM2040 VCF designs, but also because of its dual functionality that seamlessly combines a voltage-controlled filter with a phase shifter. At the heart of this module is the SSI2140 chip, a modern derivative of the legendary SSM2040. This chip enriches the sonic palette with its ability to transition between low pass filter and all pass (phaser) modes, offering a wide array of audio manipulation possibilities.
The module's flexibility is exemplified by its four OTA stages, each equipped with a switch to toggle between phaser and filter modes. By experimenting with different switch configurations, users can discover a variety of audio textures. For instance, setting two switches to phaser mode while leaving the others on low pass filter can yield complex, evolving soundscapes. This feature encourages creativity and exploration, as almost any switch combination will offer a unique outcome.
Moreover, the inclusion of a dry mix pot allows for precise blending of the dry signal with the processed output. Although this feature is typically associated with phaser mode, creative sound designers might exploit it equally well when employing the module in low pass filter mode. This openness to experimentation reflects the ethos of Nonlinearcircuits, where breaking conventions can lead to new musical discoveries.
POLES, another standout feature of the module, provides a dynamic mixing of the outputs from each OTA stage. When in full low pass mode, the output is reserved, but turning one or more switches to phaser mode enriches the output, offering vibrant harmonic content. This versatile output management makes the Fast and Bulbous particularly effective for both subtle tonal shaping and bold, resonant effects, adapting effortlessly to the needs of both intricate sound design and dynamic performance settings.
Overall, the Fast and Bulbous VCF/Phaser is a testament to how historical designs can be reimagined with modern technology to create complex and engaging audio tools. For modular synthesists seeking a multifaceted module that refuses to conform to a single role, the Fast and Bulbous presents an irresistible invitation to experiment and explore.