Play short pcm sound on CYW20706

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Robek
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Hello, I need to play short sound on CYW20706 HFP device when I turn on the device. I know that some functionality as voice route is disabled. But each HFP wireless headset has welcome sound. So how can I send short sound via pcm to speaker?

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Owen_Zhang123
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I guess you will need the audio insert function which is not supported by CYW20706. 

The function is supported by CYW20721 device.

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Owen_Zhang123
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I guess you will need the audio insert function which is not supported by CYW20706. 

The function is supported by CYW20721 device.

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Robek
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I can't change microcontroller because I've bought a lot of chips and pcbs are ready. I think that I can put array address direct into pcm peripheral register or something like DMA. But I need address of this peripherial.

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Owen_Zhang123
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Very sorry the interface is not exposed to the application level. You may take a look at the codec,  some codec has the function to add some audio/voice data.

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