The Audio Module software helps users play back stored audio files from a micro-SD memory card. The module supports 4-bit ADPCM audio files (.ad4) with sample rates from 6kHz up to 32kHz. The compact 14-pin module takes up little board space and is recommended for any application that needs embedded audio. The .ad4 file can be saved to a uSD card and playback can be regulated via one of two methods: key mode or serial mode.
The key-mode gives a stand alone operation where a host micro is not needed. With only 3 push buttons, a 3V battery and a speaker, an intense compact and low component count MP3-Player like system can be applied. The serial-mode extends a plain, 2-wire interface to any micro-controller through its DATA and CLK lines. Audio operations such as PLAY, PAUSE, STOP and VOLUME control functions are all accessible to the host micro by using simple serial commands.
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If you have additional information about which types of files Audio Module can process, please do get in touch - we would love hearing from you.
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