Reference design for high resolution audio player with Bluetooth

Rohm has anounced a high definition audio system reference design based around its BM94803AEKU media decoder processor, aimed at Hi-fi equipment, Bluetooth speakers, separate audio components and USB audio DACs.

Included in the SoC is a 108MHz ARM946ES and a dedicated DSP for CD media decoding and a co-packaged 16Mbit SDRAM – reducing mounting area and cutting pcb noise. It is designed to download programs from external serial flash and execute system control, file system management, audio codec and media control functions.

PCM output is selectable across 32, 44.1, 48, 88.2, 96, 176.4 or 192kHz and 16 or 24bit width.

DSD output sample rate can be 2.8224 or 5.6448MHz.

Input sample rate is 32, 44.1 or 48kHz.

“The media decoder supports a wide range of sources, and utilising expertise cultivated for over 20 years in developing media decoders ensures smooth playback without skipping, even with CDs featuring surface scratches” said the firm. “Non-standard USB memory prevalent in emerging countries can also be read, while unmatched playback stability allows ROHM to meet customer expectations.”

The reference design is compatible conventional (CD, USB, SD) sources, smartphones and Bluetooth, and covering music formats including MP3, WMA. AAC. WAV., FLAC and DSD.

It includes a tuner module, Bluetooth module, and CD driver “making it possible to immediately verify playback operation and enable quick development of high-resolution audio equipment,” claimed Rohm.