How to use the mic array and the on-board mic simultaneously?

[kevintsq]

I'd like to ask how to use the mic array and the on-board mic simultaneously? Since it seems impossible for me to get audio data from the mic array directly via MaixPy API, I tried to get audio data from the on-board mic while using the mic array to get sound direction. But it doesn't work. I guess there may be some I2S interface conflict between the on-board mic and the mic array. But it is said that the CPU supports 8 mics and 3 I2S devices, and the mic array contains 7 mics serving as 1 device. Could anyone helps me out? Thanks a lot~

[RexzZzY]

You could try setting on board mic to another I2S device

For I2S device 0 (I2S0)

<< Pin Assignments may be different for your board and configurations>>

fpioa = FPIOA() fpioa.set_function(21, fpioa.I2S0_IN_D0) # 21/24/15/11(Single MIC) works fpioa.set_function(24, fpioa.I2S0_IN_D1) fpioa.set_function(15, fpioa.I2S0_IN_D2) fpioa.set_function(11, fpioa.I2S0_IN_D3) fpioa.set_function(22, fpioa.I2S0_WS) fpioa.set_function(23, fpioa.I2S0_SCLK)

For I2S device 1 (I2S1) fm.register(20,fm.fpioa.I2S1_IN_D0, force=True) fm.register(19,fm.fpioa.I2S1_WS, force=True) # 19 on Go Board and Bit(new version) fm.register(18,fm.fpioa.I2S1_SCLK, force=True) # 18 on Go Board and Bit(new version)`

Find more FPIOA assignments on maixpy FPIOA docs

[petersmit]

Hi Kevin,

Did you get it working the mic array and the on-board mic. I have the same problem, I can not get it working. Can you share the code please?

Peter

[kevintsq]

I gave up and found an alternative because I didn’t have much time. There must be some way to implement this in pure C and then export the API to microPython, but you may want to reach out to some talented straight A students for help.

在 2021年11月29日，23:05，petersmit @.***> 写道：

 Hi Kevin,

Did you get it working the mic array and the on-board mic. I have the same problem, I can not get it working. Can you share the code please?

Peter

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