Convert your signals. A simple In and Out interface. The 4ms Listen In/Out interface is a brilliant little module with one single mission. Convert your signals. The top half takes care of any information coming in and converts it to Eurorack level. The bottom half does the exact opposite. It converts your Eurorack signal to a line/headphone level.
Any signal from your computer, external synthesizer, microphone, and more can be converted down to be used in your Eurorack set up. This provides endless uses. The Listen I/O features accurate LED lighting that provides information, like when the signal is clipping, so you know exactly what you're sending into your Eurorack synthesizer.
Useful Signal Conversion
The Listen I/O is a very handy module from 4ms. This simple tool converts signals to and from normal Eurorack levels. Meaning you can use lots of different equipment to reach your creative goals. The top section deals with any incoming signals, desktop synths, keyboards, computers, even microphones. Either a stereo signal or two mono signals can be plugged into the Listen I/O and then are converted to be used within the structure of your modular synth. The LED on the front panel indicates clipping, so you can be sure you're getting a balanced signal, even if you can't hear it directly. The bottom half is the total opposite. Converting any Eurorack signals to line or headphone level so that you can use it with speaker equipment or other synthesizers.
Features
- 2 Line Inputs
- 2 Line Outputs
- LED Indicators for monitoring levels
- Specifications
- 62 mA +12V
- 55 mA -12V
- 0 mA 5V
- 24 mm deep
- Width: 6HP
- Depth: 24mm
- Power: 62 mA +12V / 55 mA -12V / 0 mA 5V
How much is my shipping?
Shipping costs are calculated automatically at checkout. Simply add items to your cart and proceed to the checkout page, where you'll see the available shipping options and their prices. VAT at the applicable rate for your country will also be displayed at checkout.
European Union orders:
- Standard shipping is free on orders over €100. Express shipping is available on orders over €100, and free on orders over €400.
Poland orders:
- Standard shipping is free on orders over 250 PLN. Express shipping is free on orders over 500 PLN.
What about local taxes?
By default prices on the site include sales tax at 20%. The precise sales tax rate for your country will be calculated at checkout.
Do you ship to my country?
We ship to all EU member states from our warehouse in Warsaw, Poland. Add an item to your cart and enter your country and postcode to see the available shipping options and prices for your location. If you have any questions about shipping to your country, drop us an email at info@signalsounds.eu and we'll be happy to help.
Shipping methods
All EU orders are shipped via UPS. We offer two service levels:
- UPS Standard – our default shipping option. Delivery times vary by country (see estimated delivery times below).
- UPS Express Saver – next business day delivery to most EU destinations.
Each product page shows the estimated delivery time for your location, so you'll always know what to expect before you order.
Estimated delivery times (Standard shipping)
The times below are estimates in working days from dispatch, based on UPS Standard service. Express Saver delivers by the next business day to most destinations.
| Country | Estimated delivery (working days) |
|---|---|
| Austria | 2–3 |
| Belgium | 2 |
| Bulgaria | 4–5 |
| Croatia | 2–4 |
| Cyprus | 10 |
| Czechia | 2–3 |
| Denmark | 3 |
| Estonia | 2–3 |
| Finland | 3–5 |
| France | 2–4 |
| Germany | 2 |
| Greece | 5–7 |
| Hungary | 2–3 |
| Ireland | 4–6 |
| Italy | 3–5 |
| Latvia | 2–3 |
| Lithuania | 1–2 |
| Luxembourg | 2 |
| Malta | 5–7 |
| Netherlands | 2 |
| Poland | 1–2 |
| Portugal | 4–5 |
| Romania | 3–4 |
| Slovakia | 2–3 |
| Slovenia | 2–3 |
| Spain | 4 |
| Sweden | 3–5 |
These times are estimates and are not guaranteed. Delivery may occasionally take a little longer due to customs processing, local conditions, or carrier delays.
Dispatch times
Orders placed before 15:00 CET (Central European Time) on a working day are normally dispatched the same day. Orders placed after 15:00 CET, or on weekends and public holidays, will be dispatched on the next working day.
If you have an urgent order, please email us at info@signalsounds.eu before placing your order and we'll do our best to accommodate you.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch at info@signalsounds.eu if you have questions.
Product Overview
Convert your signals. A simple In and Out interface. The 4ms Listen In/Out interface is a brilliant little module with one single mission. Convert your signals. The top half takes care of any information coming in and converts it to Eurorack level. The bottom half does the exact opposite. It converts your Eurorack signal to a line/headphone level.
Any signal from your computer, external synthesizer, microphone, and more can be converted down to be used in your Eurorack set up. This provides endless uses. The Listen I/O features accurate LED lighting that provides information, like when the signal is clipping, so you know exactly what you're sending into your Eurorack synthesizer.
Useful Signal Conversion
The Listen I/O is a very handy module from 4ms. This simple tool converts signals to and from normal Eurorack levels. Meaning you can use lots of different equipment to reach your creative goals. The top section deals with any incoming signals, desktop synths, keyboards, computers, even microphones. Either a stereo signal or two mono signals can be plugged into the Listen I/O and then are converted to be used within the structure of your modular synth. The LED on the front panel indicates clipping, so you can be sure you're getting a balanced signal, even if you can't hear it directly. The bottom half is the total opposite. Converting any Eurorack signals to line or headphone level so that you can use it with speaker equipment or other synthesizers.
Features
- 2 Line Inputs
- 2 Line Outputs
- LED Indicators for monitoring levels
- Specifications
- 62 mA +12V
- 55 mA -12V
- 0 mA 5V
- 24 mm deep
Technical Specs
Shipping Details
How much is my shipping?
Shipping costs are calculated automatically at checkout. Simply add items to your cart and proceed to the checkout page, where you'll see the available shipping options and their prices. VAT at the applicable rate for your country will also be displayed at checkout.
European Union orders:
- Standard shipping is free on orders over €100. Express shipping is available on orders over €100, and free on orders over €400.
Poland orders:
- Standard shipping is free on orders over 250 PLN. Express shipping is free on orders over 500 PLN.
What about local taxes?
By default prices on the site include sales tax at 20%. The precise sales tax rate for your country will be calculated at checkout.
Do you ship to my country?
We ship to all EU member states from our warehouse in Warsaw, Poland. Add an item to your cart and enter your country and postcode to see the available shipping options and prices for your location. If you have any questions about shipping to your country, drop us an email at info@signalsounds.eu and we'll be happy to help.
Shipping methods
All EU orders are shipped via UPS. We offer two service levels:
- UPS Standard – our default shipping option. Delivery times vary by country (see estimated delivery times below).
- UPS Express Saver – next business day delivery to most EU destinations.
Each product page shows the estimated delivery time for your location, so you'll always know what to expect before you order.
Estimated delivery times (Standard shipping)
The times below are estimates in working days from dispatch, based on UPS Standard service. Express Saver delivers by the next business day to most destinations.
| Country | Estimated delivery (working days) |
|---|---|
| Austria | 2–3 |
| Belgium | 2 |
| Bulgaria | 4–5 |
| Croatia | 2–4 |
| Cyprus | 10 |
| Czechia | 2–3 |
| Denmark | 3 |
| Estonia | 2–3 |
| Finland | 3–5 |
| France | 2–4 |
| Germany | 2 |
| Greece | 5–7 |
| Hungary | 2–3 |
| Ireland | 4–6 |
| Italy | 3–5 |
| Latvia | 2–3 |
| Lithuania | 1–2 |
| Luxembourg | 2 |
| Malta | 5–7 |
| Netherlands | 2 |
| Poland | 1–2 |
| Portugal | 4–5 |
| Romania | 3–4 |
| Slovakia | 2–3 |
| Slovenia | 2–3 |
| Spain | 4 |
| Sweden | 3–5 |
These times are estimates and are not guaranteed. Delivery may occasionally take a little longer due to customs processing, local conditions, or carrier delays.
Dispatch times
Orders placed before 15:00 CET (Central European Time) on a working day are normally dispatched the same day. Orders placed after 15:00 CET, or on weekends and public holidays, will be dispatched on the next working day.
If you have an urgent order, please email us at info@signalsounds.eu before placing your order and we'll do our best to accommodate you.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch at info@signalsounds.eu if you have questions.
