3/16/2023 0 Comments Mbed cookbook waveplayer wav fileFind "Mbed Audio" and uninstall the device. In Device Manager, click View > Devices by Connection. If USB properties of the Mbed USB WAV Audio Player are altered, such as the sample rate or number of channels, the Mbed board will need to be deleted and re-installed in the host PC's installed device list. If View by is not set to Category, audio will be under Sound in Control Panel: The audio from the WAV file is now audible through whichever output device is selected for the host PC's audio output. Check the Listen to this Device box, and click Apply. Then, navigate to Hardware and Sound > Sound, and in the recording tab, right click on Microphone Mbed Audio > Properties > Listen. On Windows, in Control Panel, set View by to Category in the top right corner. Select Mbed Audio as the host PC's default audio input device. Make sure that the board is connected to the host PC over USB. The file "Bach-minuet-in-g.wav" is already in the correct format.Ĭompile the program and flash the binary. You can use Online-convert to achieve WAV files with different formats from any source audio file. The WAV file can have any sampling rate and can have any number of channels. It is important that the WAV file be PCM signed 16-bit little endian, or else it will not play becaues USBAudio does not support any other WAV formats. The example below uses a public domain WAV file called "Bach-minuet-in-g.wav" (attached below for download) that is inside a "songs" directory on the SD card. For example, in the example below, line 10 sets up SPI for the SDBlockDevice for the NXP K64F Mbed board. Make sure the SPI pins for the SDBlockDevice object are updated and correct for your board. The following steps demonstrate the setup and use of the Mbed WAV audio player:Īdd the sd-driver and AudioPlayer libraries to the new Mbed project directory:Ĭopy and paste the example code into main.cpp. Please install Mbed CLI to complete the tutorial.
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