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Average Price: $96
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$149
$350+
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Based on price data from 1 merchant for "Frap Tools 321". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.
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Description
Unleash the full potential of your modular synth setup with the Frap Tools 321—a versatile and compact three-channel module that brings a new level of precision and functionality to your sound design. Whether you're sculpting intricate audio landscapes or fine-tuning control voltages, the 321 is your ideal companion in the creative process. Each channel of this module offers a +6 dB level boost, allowing you to amplify signals with clarity and confidence. The phase inversion feature provides you with additional flexibility, enabling you to experiment with phase-aligned or inverted soundscapes effortlessly.
The Frap Tools 321 comes equipped with a DC-offset potentiometer, which not only lets you tweak your signals with meticulous detail but also serves as a standalone CV source when no cable is plugged into the input. This makes the 321 not just a utility module, but a potential powerhouse in any modular setup. Its total output with -6dB attenuators ensures that both audio signals and self-generated voltages are delivered with balanced precision. Whether you're working with audio signals or control voltages, the 321 is engineered to meet your exacting standards.
Key Features:
- Three-channel module with +6 dB level boost per channel
- Phase inversion capability for advanced sound design
- DC-offset potentiometer, acting as a CV source when input is unplugged
- Total output with -6dB attenuators for both audio and self-generated voltages
- Suitable for both audio signals and control voltages
- Compact design with 6 HP width and 38mm depth
- Power requirement: +48mA (+12V) / -48mA (-12V)
Product specs
| Available since | April 2018 |
| Switch Modul | No |
| CV-Editor/VC-Processor | Yes |
| Tools | No |
| Width | 6 TE / HP |
| Modul Type | Mono |
FAQs
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What functions does the Frap Tools 321 module provide in a modular synthesizer setup?
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The Frap Tools 321 module is a utility module designed for processing CV and audio signals. It offers three channels of amplification, attenuation, inversion, and offset, making it versatile for shaping and adjusting signals within your modular system.
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How wide is the Frap Tools 321 module, and will it fit in my Eurorack case?
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The Frap Tools 321 module is 6 HP wide, making it compact and suitable for most Eurorack cases. Its small size allows for efficient use of space while providing essential signal processing functions.
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Can the Frap Tools 321 module process both audio and CV signals?
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Yes, the Frap Tools 321 is designed to handle both audio and CV signals, offering flexibility in how you can route and manipulate signals within your modular synthesizer setup.
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Does the Frap Tools 321 module include any built-in tools or switch modules?
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The Frap Tools 321 does not include additional tools or switch modules. It focuses on signal processing functions like amplification, attenuation, inversion, and offset, without extra utility features.
Videos
Chris Meyer: Learning Modular + Alias Zone
Frap Tools 321 Scale + Flip + Shift + Combine (LMS: Eurorack Expansion)
Reviews
PROS
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Offers both CV and audio signal processing
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Negative scale factor allows for signal inversion
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Offset can be switched on or off for flexibility
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Features sum inputs/outputs for mini-mixer functionality
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Amplifies signals up to twice the original for overdrive effects
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Includes a -6dB switch for managing hot signals
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Exceptional build quality with top-quality components
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Compact size (6 hp) packed with features
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LEDs provide visual feedback for signal polarity
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Functions as an attenuator, offset, mixer, and signal booster
CONS
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Small pots may be uncomfortable for some users
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Frap Tools 321.
Features and functionality
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The Frap Tools 321 module is highlighted for its utility and affordability, often paired with modules like Cunsa for enhanced setup flexibility.
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The Frap Tools 321 offers -6db sum attenuators, making it distinctive compared to the Happy Nerding 3xMIA, which has more channels but lacks this feature.
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Use cases and applications
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The 321 module is frequently used alongside other triple digit modules (333, 411) to optimize modular synth setups, particularly in Frap Tools-centric cases.
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The Frap Tools 321 is suggested for users wanting multiple attenuverters with offset, enhancing modulation and mixing in generative ambient music setups.
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User experience
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Owners integrating the 321 module report satisfaction in its role within a broader ecosystem, often recommending it as a foundational piece in a modular synth setup.
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Critic Reviews
Based on 0 Reviews and 0 Ratings
Artist usage
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Based on how musicians on Equipboard use Frap Tools 321, it is most commonly used with the following gear.
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