I am looking to make audio circuit

[SMeht.1]

I am looking to make audio circuit. I need suggestion for microphone followed by noise cancellation ICs.

Any help will be appreciated.

Thanks

Sudhanshu.

[Eleon BORLINI]

Hi @SMeht.1​ , as I wrote before, the reference design for an active noise cancelling and, better, beam-forming app is the Bluecoin tool, aka STEVAL-BCNKT01V1 (the first one you mentioned in the comment here above). The other suggested evaluation tool is the X-NUCLEO-CCA02M2. Both them can be interfaced with the tool you suggested, the NUCLEO-F410RB, that acts as master board. You can find the FW libraries for the PDM to I2S conversion in the Middlewares folder of the function pack FP-AUD-SMARTMIC1.

I suggest you not to use the STEVAL-MKI126V3 / STEVAL-MKI138V1 and related SW, because they are nrnd products and are no more supported.

[SMeht.1]

Hello @Eleon BORLINI​ 

Thanks for your reply.

As per your suggestion, i have started doing POC with STEVAL-BCNKT01V1 .

it works fine when i record sound on PC using USB.

My next action is to make it compatible with product. I want to take this audio over I2S and send this to bluegiga wt32i iwrap6 module.

I am getting challange in this.

i want to reduce following items of STEVAL-BCNKT01V1 module.

LRCLK (Word Select Clock) - 8.00 kHz

BCLK (Bit Clock) - 385 kHz

I can compile code. Can you suggest how to lower this. I am using STM32CubeFunctionPack_SMARTMIC1_V2.0.0.

other wise voice on other side of Bluegiga module is cracking.

Thanks

Sudhanshu Mehta