Microchip Solutions for Digital Audio Applications
Today’s designers are looking for many different types of digital audio solutions for their products. Microchip supplies a range of products, from audio decoders to different types of audio streaming solutions that include Bluetooth® as well as USB connectivity. In addition, Microchip offers solutions for graphics, USB drivers, file systems, and a DSP Fixed-Point Math Library to provide Total System Solutions (TSS) for many audio applications.
Our PIC32 Digital Audio Solutions currently focus on three areas:
- Audio Decoders/Encoders: MP3, WMA, AAC, WAVE, FLAC, etc.
- USB Audio: Audio playback from a personal computer, Android™ device, or Apple® device; also supports other functions like capturing microphone data, bidirectional headset functionality, communicating data for Made for iPod® (MFi) applications, as well as acting as a USB host
- Bluetooth Audio, Voice, and Data: Wireless audio streaming and wireless data transmission, as well as other functionality including HFP/HSP; supports Classic Bluetooth and Bluetooth Low Energy (BLE) modes
Audio decoders are the foundation of audio playback. They decode the digital audio file information for playback via some type of speaker (headphones, PC speakers, etc.). Microchip the following decoders for developing a variety of USB audio and Bluetooth audio applications:
These audio decoders are the basis for many of the different solutions USB Audio and Bluetooth Audio.
Some of these audio decoders may need to be licensed from a third party. Visit the PIC32 Audio Decoders page for more information.
Microchip also offers PCM and ADPCM audio encoders.
(1) The MP3, WMA and AAC decoder libraries are available for purchase from microchipDIRECT.
USB audio solutions enable audio streaming over USB. To support the growing number of Android and Apple devices, such as tablets and smartphones, we offer solutions that enable USB connections for Android Open Accessory (AoA), MFi and Samsung audio applications.
Our PIC32 USB audio solutions offer a flexible range of playback options and support for high-resolution audio up to 192 kHz/24 bits per sample.
In addition, the MPLAB® Harmony USB Device Libraries support the both USB Audio Class 1.0 and USB Audio Class 2.0.
The MPLAB USB Audio Host Client Driver Library allows host applications to interact with and support USB Audio Class 1.0 devices.
Bluetooth has become a popular solution for incorporating wireless audio into tablets, smartphones and portable media players.
Bluetooth audio is most commonly associated with the Advanced Audio Distribution Profile (AD2P), with the audio encapsulated with either Advanced Audio Coding (AAC) or Subband Coding (SBC) audio codecs.
Microchip’s Bluetooth Library includes support for these codecs and the A2DP profile. It also includes options for Hands Free Profile (HFP), Handset Profile (HSP) and Audio Video Remote Control Profile (AVRCP) as well as for Serial Port Profile (SPP) for data.
We also offer the BM64 stereo audio module and the RN4871 module for implementing Bluetooth Low Energy designs. For more information on Bluetooth Low Energy, please visit the Bluetooth Low Energy Solutions.
Libraries and solutions are also available for implementing DSP functionality:
- CMSIS Library: DSP functions for ARM® Cortex®-M based microcontrollers
- DSP Fixed-Point Math Library: Dedicated libraries for the PIC32MZ family of microcontrollers
PIC32 Digital Audio Development Boards
Microchip offers several development boards for the development of Digital Audio for both USB Audio as well as Bluetooth Audio.
|PIC32MX Curiosity Development Board||DM320103|
|PIC32MM USB Curiosity Development Board||DM320107|
|PIC32 Bluetooth Audio Development Kit||DV320032|
|PIC32 Bluetooth Starter Kit||DM320018|
|PIC32MZ Embedded Connectivity with FPU (EF) Starter Kit||DM320007|
|PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit||DM320010|
|PIC32MZEF Curiosity Development Board||DM320104|
PIC32 Digital Audio PIMs and Compatibility
The PIC32 Bluetooth Audio Development Kit supports multiple PIMS which are supported with the PIC32 Bluetooth Development Kit.
|PIC32MZ EF Audio PIM||MA320018|
|PIC32MX270F512L Bluetooth PIM||MA320017|
PIC32 Digital Audio Daughter Cards
The PIC32 Digital Audio Daughter Cards are compatible with the PIC32 Bluetooth Audio Development Kit as well as the PIC32 Bluetooth Starter Kit.
|BM64 Bluetooth Radio Daughter Board||AC320032-3|
|Audio Codec Daughter Card – AK4642||AC320100|
|Audio Coder Daughter Card – AK7755||AC327755|
|PIC32 Audio DAC Daughter Card||AC320032-2|
|Multimedia Expansion Board II||DM320005-2|
16-bit PIC® MCU and dsPIC® DSC Development Boards for Audio
|Explorer 16/32 Development Board||DM240001-2|
|MPLAB Starter Kit for dsPIC DSC||DM330011|
PIC32 Multimedia Expansion Board
The PIC32 MEB II is a highly integrated, compact and flexible development platform. The MEB II integrates with the PIC32MZ Starter Kits for a complete graphics development solution.
|Multimedia Expansion Board II||DM320005-5|
Recording and Playback Software Libraries
|Audio Functions||Resource Type||Title and Link||Supported Families|
|Audio and Speech||Library||MP3 Decoder Library for PIC32MX||PIC32 MCU|
|Audio and Speech||Library||PIC32 Audio Equalizer Filter library||PIC32 MCU|
|Bluetooth Audio||Library||PIC32 Bluetooth® Audio Software Suites||PIC32 MCU|
|AAC Playback||Library||AAC Decoder Library for PIC32||PIC32 MCU|
|Streaming Audio||Demo||USB Audio Headset Demo||PIC32MM MCU|
|Record and Playback, Streaming Audio||Library||dsPIC33E Sample Rate Conversion||dsPIC33E|
|Record||Application Note and Source Code||AN1152-Achieving Higher ADC Resolution Using Oversampling||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||Library||SW300026 dsPIC/PIC24 G.711 Speech Encoding & Decoding Library||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||Library||SW300090-dsPIC G.726A Speech Encoding/Decoding Library||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||Library||SW300070-Speex Speech encoding/decoding Library||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||Library||dsPIC® DSC Equalizer Library||dsPIC33E, dsPIC33F|
|Voice Communcations||Library||SW300060-Aucostic Echo Cancellation Library||dsPIC33E, dsPIC33F|
|Voice Communcations||Library||SW300080-Line Echo Cancellation Library||dsPIC33E, dsPIC33F|
|Voice Communcations||Library||SW300040-Noise suppression library||dsPIC33E, dsPIC33F|
|Voice Communcations||Library||dsPIC DSC Automatic Gain Control Library||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||GUI||dsPIC DSC Speech and Audio Fast Forward (SAFF) tool||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||GUI||Digital Filter Design||dsPIC33E, dsPIC33F|
|Record and Playback, Voice Communications||GUI||dsPICworks Data Analysis & DSP software (use to convert PCM to WAV and back)||PIC24F, dsPIC33E, dsPIC33F|