Audio Injector Ultra Sound Card for Your Pi Now on Kickstarter

By on April 19, 2018
Pin It

Flatmax Studio has just launched their latest board designed for Raspberry Pi on Kickstarter: the Audio Injector Ultra Sound Card.

The board gives high fidelity input and output audio @ 192 kHz, is equipped with digital output (S/PDIF) and offers dual microphone capability.  It uses premium components to ensure a low noise floor, low jitter and low harmonic distortion.


  • Direct Inputs – Unpopulated Analogue Connectors (stereo RCAs provided)
  • Direct Outputs  – Unpopulated Analogue Connectors (stereo RCAs provided), Digital Optical SPDIF (Optical transducer provided)
  • Potentiometer Inputs – Unpopulated Connectors and potentiometer (stereo pot. not provided).
  • Potentiometer Outputs – Unpopulated Connectors and potentiometer (stereo pot. not provided).
  • Microphone – 2x high-quality ultrasound (model – SPU0410LR5H) surface mount microphones populated
  • Audio Codec – Cirrus Logic CS4265 stereo codec
  • Sample rate – 192 kHz, 24 bit
  • Jitter control – Low jitter clock oscillator
  • Hardware Compatibility – Works with the Raspberry Pi 2, Pi 3, Zero, etc.
  • Metal film capacitors in the line driver/receiver audio paths yielding low harmonic distortion levels.
  • TI DRV632 line drivers on output giving 2Vrms (5.66 V peak-to-peak)
  • Mute line driven outputs – for silence!
  • Breakout pins exposing 5v, Rin/Lin, InGND, Rout/Lout, GND, Mute.

The Balanced Ultra board is an extra balanced HAT that can be added to the sound card. It appends the following specifications:

  • Balanced line drivers (TI DRV632 5.66 V peak-to-peak)
  • TI INA1650 balanced line receivers
  • Output connectors – 1/4″ TRS connectors (unpopulated)
  • Input connectors – 1/4″ TRS connectors (unpopulated)

A pledge of $19 US should get you one Ultra Sound card, while you’d have to spend $38 US for the Balanced Ultra board + Ultrasound card. For further information, you can refer to the Kickstarter page.

About Luca Ruggeri

Leave a Reply

Your email address will not be published. Required fields are marked *