No recording from DMIC on iMX6 Kitkat 4.4.2

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No recording from DMIC on iMX6 Kitkat 4.4.2

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krzysztofsza_ac
Contributor III

Hi. We're trying to figure out why we cannot record audio. We've connected MP34DT01 microphone to proper pins of module (dmic_clk, dmic_dta) but we don't receive any data from mic. What we'ce observer is that there is no clock wave on dmic_clk, which we think should be generated at least when we start recording. Is there anything we have to switch on in kernel or in other place to make it working?

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saurabh206
Senior Contributor III

Hi

Does your sound card registered properly for "MP34DT01"?

is this default sound card?

you also need to modify hardware\imx\alsa for your sound card.

Thanks

Saurabh

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krzysztofsza_ac
Contributor III

Used sound chip is TLV320AIC3106 and it's registered and working properly as we can play audio with success.MP34DT01 is just MEMS microphone, which doesn't require any special handling. While having clock signal it should output converted (A/C) data on dout pin.

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