This is an introduction to the H1 Analog Harmonizer by Weston Precision Audio, available at Takazudo Modular.
The H1 is a Eurorack module designed to easily add harmonic layers and basic polyphony to a modular system. By connecting a VCO’s output to the “osc in” input, it generates two pitch-related tones (for example, a major third and a fifth to form a major chord). The H1 can also be used as a dual quantizer, frequency-to-voltage converter, or as two analog VCOs.
The detailed introduction for this product is currently being written and will be updated upon completion.
This product is available for purchase below.
- Product Photos
- H1 Analog Harmonizer Features
- Reference Videos
- Manual
- Technical Specifications
- Included Accessories
Product Photos




H1 Analog Harmonizer Features
- Versatile uses: chord generation, quantizing, frequency doubling, drone oscillator, frequency-to-voltage conversion, tuner, and more
- Fast and accurate frequency tracking from an external oscillator
- Two stable digitally controlled analog oscillators
- Mixer output and -9dB pad option to reduce cable clutter
- Analog thru-zero FM on both oscillators
Reference Videos
Below is an official demo video of the H1 Analog Harmonizer from Weston Precision Audio.
Manual
The manual for this module is available on the official Weston Precision Audio website below.
Technical Specifications
- Width: 18HP
- Depth: 33mm
- Power consumption: +12V:200mA / -12V:85mA / 5V:0mA
Included Accessories
- Power ribbon cable
- Screws
- Weston Precision Audio sticker
About Weston Precision Audio
Weston Precision Audio is a modular synthesizer maker based in North Carolina, USA.
We started carrying Weston Precision Audio after the founder, Devin, reached out to us by email about distribution. When the modules actually arrived, we still remember being struck by how beautifully made every single one was.
His modules show a real commitment to keeping that hands-on analog feel intact, and once you pick one up, the care he puts into materials and components becomes obvious — that is something we can promise.
Bonus: Modular Accessory Set by 電氣美術研究會 (Denki Bijutsu Kenkyukai) Included

In the hope that more people will get hands-on with modular synths, we have teamed up with 電氣美術研究會 to bundle a modular accessory set with this product.
The contents vary by season — patch cables, power cables, a dress-nut sample set, a mono splitter, and more. The set is included with the product, so please give it a try!
That concludes our introduction of the H1 Analog Harmonizer.
Takazudo Modular publishes manuals and related documents with Japanese translations. See the links below.
We hope you find this helpful.