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respeaker / get_started_with_respeaker

This is the wiki of ReSpeaker Core V2, ReSpeaker Core and ReSpeaker Mic Array.
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Recording Each Microphone Individually (7 Channel wav file output) #192

Open dnakamura464 opened 6 years ago

dnakamura464 commented 6 years ago

ReSpeaker Mic Array w/ ReSpeaker Core (not v2)

I want to be able to use the Mic Array and Core to record each microphone in the array individually so that the output wav file has 7 channels, each with a recording from a different microphone. Is this possible? Using Audacity, alsamixer, and get_device_info_by_index() in python to see how many channels I can record with, the maximum amount is always 2.

I tried using arecord -v -D plughw:1 -f S16_LE -r 16000 -c 8 audio-8ch-16k.wav to force the mic array to record in 8 channels, but this only produced an 8-channel wav file with 2 channels having audio data, and the other 6 completely empty.

The end goal for my application of the microphone array is to be able to calculate the position (angle and distance from the array) of people nearby by relative time delays between microphone recordings. Is there an alternate method I can use to find these same parameters?

We have the mic array and core plugged into a Raspberry Pi 3 running Raspbian if that helps at all.

Thanks in advance.

xiongyihui commented 6 years ago

To get 7 channel raw audio, use the dfu tool to change the firmware of the mic array. See https://github.com/respeaker/mic_array_dfu

dnakamura464 commented 6 years ago

I stumbled upon that earlier and it worked perfectly. Thanks!

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To get 7 channel raw audio, use the dfu tool to change the firmware of the mic array. See https://github.com/respeaker/mic_array_dfu

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