This is an introduction to the ADDAC219IN Stereo > Dual Mono by ADDAC System, available at Takazudo Modular.
The ADDAC219IN Stereo > Dual Mono is an interface module that separates external line-level stereo signals into individual left and right mono outputs. It accepts a 3.5mm stereo TRS jack input, internally splits the signal into left and right mono, and outputs each through independent 3.5mm mono output jacks. It also boosts line-level signals to Eurorack level. With two conversion sections, this module serves as a bridge between external gear and your Eurorack system.
This product is available for purchase below.
Takazudo Modularではマニュアル等の日本語訳付きを作成し、公開しています。以下よりご参照下さい。
- Product Photos
- Splitting Stereo Into Dual Mono
- Adjusting Audio Level Differences
- Examples of Gear With 3.5mm Stereo TRS Audio Output
- Related Products
- Technical Specifications
- Included Accessories
Product Photos



Splitting Stereo Into Dual Mono
This module's function is straightforward -- exactly as described above: Split stereo into dual mono. Boost the level and output it ready for modular use!
Even when building a Eurorack system, you will often want to use other gear alongside it. For example, our shop carries the following as standalone audio devices:
The latter, The Mystic, has a mono output and can be connected directly to a Eurorack system. However, Wingie2's output is stereo -- audio out via a TRS cable carrying combined L/R signals. To connect this to a Eurorack system, you need to convert it to mono.
In such cases, you would need a cable that splits stereo into two mono signals, but having a dedicated module pre-installed in your setup keeps things tidy.
Adjusting Audio Level Differences
The ADDAC219IN does not just convert stereo signals to mono -- it also adjusts audio signal level differences.
Audio signals exchanged between Eurorack modules are around +/-5V, while other gear typically operates at +/-2V or less. In short, the signals exchanged between Eurorack modules are a bit too hot for most electronic instruments.
This is due to historical differences in how instruments evolved -- most electronic instruments handled audio waveforms at +/-2V or less, while Eurorack modules adopted +/-5V. Because of this voltage difference, you may notice that audio from external music gear sounds too quiet when brought into a Eurorack system.
This is where the ADDAC219IN's ability to boost the level of audio imported from external gear comes in handy. This module handles the level adjustment simultaneously -- a welcome convenience.
Examples of Gear With 3.5mm Stereo TRS Audio Output
Music gear that outputs audio via a 3.5mm stereo TRS jack includes products such as:
Devices with 3.5mm stereo TRS jacks tend to be smaller, gadget-style instruments. Additionally, since standard small headphone jacks are 3.5mm stereo TRS, this module could also be useful when you want to quickly bring audio from a PC or smartphone into your Eurorack system.
So whenever you want to bring something from outside your modular into the system, this is a great module to have on hand.
Related Products
The reverse of this module -- one that combines dual mono into stereo -- is also available from ADDAC System, and we carry it as well.
Please check that out as well.
Technical Specifications
- Width: 3HP
- Depth: 40mm
- Power consumption: 20mA +12V / 20mA -12V / 0mA +5V
Included Accessories
- Power ribbon cable
- Screws
ADDAC Systemについて
ADDAC Systemはポルトガルのモジュラーシンセメーカーです。
アナログ良さを生かした、ベーシックな機能をしっかり形にしているモジュールラインナップを基本としつつも、CVをMIDIに柔軟にコンバートしたり、高度にコントロール可能なグラニュラープロセッサー等、デジタル技術もうまく調和させた独創的なモジュールも数多くリリースしています。
オマケ: 電氣美術研究會モジュラー小物セット付き

モジュラーシンセをもっと多くの方に触って欲しいという願いの元、電氣美術研究會さまにご協力頂き、モジュラー小物セットを本商品にバンドルさせて販売させていただいております。
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That concludes the introduction to the ADDAC219IN Stereo > Dual Mono.
Takazudo Modularではマニュアル等の日本語訳付きを作成し、公開しています。以下よりご参照下さい。
We hope you found this helpful.