I'm in the same boat - did you (or anyone) ever find an answer to this?

Not a bad idea. It's not an esp32 solution, though, AFAIK. (thanks)
So anyone have any ideas how to use Quad SPI mode? Esp in Arduino?

I have https://www.seeedstudio.com/Sipeed-6-1-Microphone-Array-for-Dock-Go-Bit-p-2875.html, and am trying to beamform with the esp32s3. Alas, you really need to read all the 7 microphones at once, and there are only 2 i2s ports on an esp32s3. IE: You can read at most, 4 microphones simultaneously. I...

I know, I know,
ancient dead
5yo thread
But someone said
What's in my head
ESP32 parallel DMA
I need to find a better way
to import 4 bits at a time
or maybe find a better rhyme
I haz 6 i2s MICs
and don't wanna bitbang 'em; yikes!