I2S microphone (RX)

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Re: Megaphone example for ESP32-LYRATD-MSC

Postby theronic » Tue Mar 12, 2019 7:48 am

Hi BuddyCasino, I'm trying to get your megaphone example working on the ESP32-LYRATD-MSC, but I'm only getting silence. I've spent a few days trying to cross-correlate what's different in the get-started/player examples and the newer esp-avs-sdk, but I'm only getting silence. Do you perhaps have some pointers or code lying around for the LYRATD?
BuddyCasino wrote:
Thu Jul 13, 2017 11:25 am
You might want to take a look at my megaphone example.

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Re: I2S microphone (RX)

Postby BuddyCasino » Tue Mar 12, 2019 8:56 am

Sorry no, I don't have a Lyra.

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Re: I2S microphone (RX)

Postby fly135 » Tue Mar 12, 2019 4:14 pm

felipeduque wrote:
Fri Feb 01, 2019 2:27 pm
Now, I've only managed to get perfect I2S sound for sampling rate 8 kHz. From my experience with other I2S drivers (for H3 boards), it's a matter of proper clock handling. Probably some I2S master clock is too slow - maybe it didn't expect any sampling faster than 8 kHz? Anyway, I did not delve into it.
Just for reference I've had no problems capturing at 16Khz. However, If you try to capture and send in the same thread I would expect to have performance issues.

I just ordered a LyraT from China. Expect to get it in a couple weeks.

John A

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