A comprehensive, unified interface for small audio peripherals

Quick Facts

Primary Use

For small, cost-sensitive audio peripherals

Physical Layer

CMOS I/Os

Fundamental features
  • High performance
  • Low power
  • Low EMI
Use Cases

Microphone array
Stereophonic and surround sound
Low-latency multichannel audio transfer

Industries

Icon of a Smart PhoneIcon of a TabletIcon of an AutomobileIcon of a cloud with the letters IoT inside.

Overview

MIPI SoundWire®, introduced in 2014, consolidates many of the key attributes in mobile and PC audio interfaces, providing a common, comprehensive interface and scalable architecture that can be used to enable audio features and functions in multiple types of devices and across market segments. It supports the use of advanced amplifiers and microphones. In addition, it can also optimize speaker protection, microphone power and performance, noise cancellation and always-listening audio input.

MIPI SoundWire is developed by the MIPI Audio Working Group.

MIPI SoundWire’s key features include a double-data rate, configurable frame size, low complexity, low power, low latency, optional multilane extensions, PCM and PDM format, multichannel data and a low gate count. It can be embedded in small, cost-sensitive audio peripherals such as amplifiers and microphones. It is also used in smartphones, tablets, PCs, automotive and embedded systems.

With v1.2, introduced in 2019, MIPI SoundWire gains several improvements to further aid the integration of audio components in mobile and mobile-influenced systems. There are three main additions:

  • Improvements that make it easier to implement SoundWire in systems with a wide range of hardware topologies, including larger form factors
  • Features that lay the foundation for an upcoming device class specification for communicating audio device properties in the OS
  • Various optimizations, including a way to directly communicate the bus clock speed to system hardware

These updates benefit SOC, device and system vendors as well as OEMs and system integrators. SoundWire v1.2 and v1.1 controllers are interoperable.

MIPI SoundWire can coexist with MIPI SLIMbus or non-MIPI interfaces through bridging solutions.

The software component, MIPI DisCo Specification for SoundWire v1.0, is available to the public.

Note: The full specification is available only to MIPI Alliance members. For information about joining MIPI Alliance, visit Join MIPI.