Wireless Audio Streaming Solution

Incorporated with Golden Bridge Module (GBM) and Real Acoustic Wave (RAW) technology, PROS offers a comprehensive solution to fulfill Hi-Fi audio streaming requirement from and to any device, anytime and anywhere.



GBM is a high performance module for digital audio system.   A broad range of wireless connectivity and streaming protocols, such as Wi-Fi 802.11an, STA-AP-p2p roles, Bluetooth* 4.0+LE, NFC, RAW PLAY, AirPlay**, DLNA*** and A2DP, are supported seamlessly and simultaneously.  The modern streaming technologies are supported for consumers to access media library from any device everywhere.  RAW technology is exclusively for high fidelity lossless streaming by raw data.  The entire system architecture is designed for up to 192kHz/24bits audio streaming applications.



GBM is developed based on TI Cortex-A8 SoC, integrated Wi-Fi and Bluetooth System-in-Package (SiP) module.  The dynamic computation power ranged from 300MHz to 1GHz is capable of full native functions with spare tolerance for additional complicate applications.  Excellent jitter and better stability of the audio subsystem is contributed by MEMS multiple clock sources.  The internal DAC generating industrial standard 2Vrms line-out and both I2S and S/PDIF digital output simplify integration for further post process, no matter linear, digital AMP, CODEC, DAC, DSP or end equipment.   Its low power consumption and small form factor provide designers high flexibility of wireless extension.



The powerful platform is ideal for peer-to-peer and networked streaming services while remaining Internet accessibility and ease of use.  The platform is ready for firmware upgrade Over-The-Air (OTA).   Any deployed devices can be managed and refreshed for upcoming features or bug fixes from field easily.  GBM SDK is open for OEM’s value added application under software license agreement, which means software feature can be redefined and developed for specific requirement.


RAW PLAY (https://play.google.com/store/apps/details?id=com.prosys.rawplay&hl=zh_TW)

PROS offers an exclusive companion APP for direct streaming.  Thanks to advanced Wi-Fi standards, RAW PLAY is fully compliant with Wi-Fi Direct for ease of peer-to-peer service without the need for a Wi-Fi network.   It has never been so easy to realize flawless audio streaming indoor and outdoor with no configuration effort.  Users can setup and start streaming via multiple NFC tags anywhere or a click on a widget.  RAW PLAY takes care of all the other procedures by converting pristine uncompressed data from android device to GBM like a virtual coaxial or S/PDIF cable in between smart handheld and amplifier.



As a MFI developer, PROS supports Apple AirPlay protocol, which allows audio connection from iDevices natively, PCs and Macs to GBM receiver.  With WAC support, GBM can be setup and configured by a simple scenario.  For detail, please refer to Apple/MFi website. (https://mfi.apple.com/)



GBM supports industrial streaming protocol-DLNA 1.5, which allows connection to almost any device with built-in DLNA stack, Digital Media Player (DMP) or DLNA APPs from market places.



Bluetooth is widely used for years and compatible with many legacy devices.  GBM supports Bluetooth A2DP and AVRCP profiles for short ranged peer-to-peer stereo audio.  The original data format of stereo audio will be up-scaled to higher sampling rate and resolution.


Demo Kit GB1

Not only a convenient wireless connection between smart handhelds and Hi-Fi system, GB1 can receive audio content from smart handheld or media server and output to headphone or home premium audio system.  The smart gadget is ideal for evaluation prior to design-in.

Product specification:

1.          RAW PLAY, AirPlay audio receiver, DLNA-DMR and A2DP-sink

2.          Wi-Fi 802.11an, Bluetooth and NFC technology

3.          DAC

-Sampling rate: 192kHz

-Resolution: 24bits

-SNR> 97dB

-THD+N< 0.008%

4.          Stereo 3.5mm & mini-Toslink (S/PDIF) dual-output

5.          Power supply: 5V@500mA (micro-USB)

6.          LEDs (Red: Power, Blue: Streaming/Wi-Fi STA and Green: Wi-Fi AP/p2p

7.          Dimension: 45x65x10 mm3


The unit price of GB1 is US$150. We can accept your payment by PayPal.


For more information, please contact our sales representative-Arthur Lin arthur.lin@prosys.com.tw


About PROS

A system design company focusing particularly in the areas of wireless connectivity, technical support and embedded software design, PROS commits to deliver ‘Convenience’ and ‘Quality’ into digital audio world, making a whole new wireless audio experience.


PROS Systems, Inc.

+886-2-2651-3822 (O) 

+886-2-2651-3821 (F)

3F, No.26, Fukang St.

Nangang, Taipei 11571

Taiwan (R.O.C.)



*Bluetooth is a trademark of Bluetooth SIG.

**AirPlay is a trademark of Apple, Inc.

***DLNA is abbreviation of Digital Living Network Alliance.