Deftaudio Teensy 1U Interface – a powerful, feature-rich solution designed for musicians, audio engineers, and developers seeking a compact yet highly capable MIDI and Audio interface. This advanced unit delivers an impressive combination of functionality in a sleek 1U form factor, including:

• MIDI Interface: 8x14 MIDI routing capabilities for complex configurations and flexible connectivity.

• Audio Outputs: 4 audio output channels, ideal for professional sound applications.

• Trigger & Sync: 6 configurable trigger and sync outputs for seamless integration with modular gear, drum machines, or analog synthesizers. Up to 200mA per output can drive directly Eurorack gear, sequencers, drum machines, arpeggiator inputs or external load such as relays, LEDs, etc.

• USB Connectivity: Full USB MIDI and Audio Class Compliant support for easy interfacing with computers and standalone operation without the need for a host system.

Best of all, the Deftaudio Teensy 1U Interface is fully open-source. All hardware schematics and software source code are freely available. The unit comes with a fully featured firmware which requires no extra development for the basic operation. However, can be easily customized, inviting users to expand, or adapt the system for their own creative or technical needs.

Package options:

• PCB alone: Default option. Only main PCB included. You source all other parts (based on the BOM list) and assemble yourself.

• Complete Electronics kit: Includes main PCB and all electronics (but Teensy4.1) - Din5 and TRS connectors, optocouplers, headers, resistors, diodes, USB socket, OLED screen, Encoders. It doesn't include Teensy 4.1 (purchase at https://www.sparkfun.com/teensy-4-1-without-ethernet.html) or mounting hardware. Check BOM list by the link. Soldering is required, refer to the assembly guide.

• Complete Electronics kit with front panel: Same as above but also includes aluminum front panel, mounting screws and encoder caps. It doesn't include Teensy 4.1 or other parts of enclosure. Soldering is required, refer to the assembly guide.

• Full kit: Includes everything with programmed Teensy 4.1 and all enclosure parts, mounting HW, etc. Soldering is required. You need to supply your own USB cable or USB PCB mount cable extension. Soldering is required, refer to the assembly guide.

• Fully assembled: Everything is assembled and ready to be used. Has USB-B port installed on the back for easy connection.

Technical Specifications

• Core Platform: Teensy 4.1 (600MHz ARM Cortex-M7)

• MIDI Routing: 8 input x 14 output matrix (8x8 DIN5 ports + 6 TRS configurable ports)

• Audio Outputs: 4 independent channels (2 high-quality Burr-Brown DAC channels + 2 MSQ Teensy channels)

• TRS MIDI/Trigger/Sync Outputs: 6 configurable ports between MIDI, 5V Trigger out or Sync out (resolution can be adjusted)

• Connectivity: USB MIDI and Audio class compliant client port. Shows as 16x16 MIDI + 2x2 USB Audio device. Additional USB Host port for routing USB MIDI Class Compliant devices. Standalone operation capable.

• Controls: OLED Screen, two rotary encoders, activity and power LEDs. Allows TRS port configuration from the panel without re-programming. Displays real-time information on the screen.

• Power Source: Over USB or with external 9-12V PSU for driving high loads on trigger outs

• Hardware: Options include 1U aluminum front panel, full PCB enclosure.

• Programming Environment: Arduino IDE compatible

• Software: Includes the basic firmware that implements all functions. Extensive audio design libraries are available from Teensy/PJRC to implement extra functionalities (synth, FX, processing).

• Open Source: Full access to hardware schematics and source code for customization and development

More Information:

Introduction video

Schematics

User Manual

Assembly Manual

BOM list