USB-HEAR

USB High-end Audio Receiver

DAC Output

SPDIF Output

Digital Input

Control Interface

USB HID Consumer Control

Simplified System Integration

Microcontroller-based USB audio receiver solution for simplified integration in professional high-end HiFi applications.

USB-HEAR Module

The FC301 USB-HEAR Module is a microcontroller-based USB audio receiver solution for HiFi DAC and amplifier applications. It is implemented as a system on module (SoM) which enables easy and rapid integration.

The FC301 USB-HEAR Module implements a USB audio class 2.0 compliant PCM and DSD playback interface compatible with Windows 11/10, macOS and Linux hosts. For Windows, a bit-perfect, high-res audio driver is available.

For proper integration with a DAC, the module supports an external master clock input. The receiver can be controlled and monitored through an I2C register interface and a set of control and status lines.

Typical Application

Scenario in a DAC or amplifier product

Feature Overview

Main Features

USB Audio

USB audio class 2.0 compliant isochronous streaming, two audio channels (stereo)
Asynchronous clocking model, USB playback stream is synchronized to master oscillator
32-bit PCM sample format up to 768 kHz sampling rate
Native DSD up to DSD1024, compatible with Windows driver and Linux
DSD over PCM (DoP) up to DSD256
ASIO compatible (DSD and DSD over PCM)

DAC Output

I2S compliant digital interface for connecting a digital-to-analog converter
32-bit PCM format up to 768 kHz sampling rate
DSD format up to DSD1024

Control Interface

Control and status register set accessible via I2C
Interrupt status line for notifications on status register changes
Status lines for master clock selection, PCM/DSD format selection and DAC mute

Additional Features

Digital Input

I2S compliant digital interface for connecting external digital sources such as a streaming client or tuner
32-bit PCM format up to 192 kHz sampling rate

SPDIF Output

24-bit PCM format up to 192 kHz sampling rate

USB HID Consumer Control

Multimedia key events can be sent to the host to control a player application
For example: Volume Up, Volume Down, Play, Pause, Fast Forward, Fast Backward etc.

made in Germany

Our hardware and software is purely designed and implemented by our teams in Germany.

Technical support is provided directly by the developers.

USB-HEAR DevKit

The FC920 USB-HEAR DevKit comes as a Raspberry Pi format compatible Kit for direct usage of FC301 USB-HEAR Module. Mounting holes and pin-connector are identical to Raspberry Pi 3A+ Format to use existing Audio extensions as easy as possible.

The DevKit includes pre-soldered FC301 USB-HEAR Module and all needed cables for power-up and SPDIF extension.

To start using the FC301 USB-HEAR Module, the FC920 USB-HEAR DevKit can be used as reference, evaluation and validation environment.

Typical Application

Scenario with a DAC or amplifier product

Feature Overview

Main Features

USB Audio

USB audio class 2.0 compliant isochronous streaming, two audio channels (stereo)
Asynchronous clocking model, USB playback stream is synchronized to master oscillator
32-bit PCM sample format up to 768 kHz sampling rate
Native DSD up to DSD1024, compatible with Windows driver and Linux
DSD over PCM (DoP) up to DSD256
ASIO compatible (DSD and DSD over PCM)