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This application note shows how to use low-power CC111x and CC251x SoC RF transceivers to provide a low-cost 16-bit 16-kHz audio to USB interface. Sample code and hardware designs are given for the 900 MHz ISM bands using the CC1110 and CC1111; these can be easily modified for the 2.4GHz ISM band using the CC2510 and CC2511.
http://www-s.ti.com/sc/techlit/swra368
Download associated code files: http://www-s.ti.com/litv/zip/swra368