Hello, I just bought 2 of these microphones to use them in my raspberry pi as a stereo as the tutorial says: https://learn.adafruit.com/adafruit-i2s ... -pi-wiring -test
My question is: is it possible to connect 4 or even 6?
This is how I replicate this: https://www.amazon.com/-/es/Seeed-Studi ... 076SSR1W1/
(It will be a bit more expensive, but at least I can put it as far away as I want with cables, and as many mics as I want.)
More than 2 Adafruit I2S MEMS microphones
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- principemestizo
- Posts: 5
- Joined: Sat May 01, 2021 11:04 am
- principemestizo
- Posts: 5
- Joined: Sat May 01, 2021 11:04 am
Re: More than 2 Adafruit I2S MEMS microphones
The tutorial (url correction): https://learn.adafruit.com/adafruit-i2s ... iring-testprincipemestizo wrote:Hello, I just bought 2 of these microphones to use them in my raspberry pi as a stereo as the tutorial says: https://learn.adafruit.com/adafruit-i2s ... -pi-wiring -test
- danhalbert
- Posts: 4687
- Joined: Tue Aug 08, 2017 12:37 pm
Re: More than 2 Adafruit I2S MEMS microphones
The Rpi only has one I2S channel available, according to what I have seen. You can use up to two microphones on one I2S channel, because of I2S's provision for stereo.
The Seeed board gets around that by using a 4-channel ADC (and analog mic's)
I found a number of discussions of multiple mics, but it's not easy: https://www.google.com/search?q=raspber ... ltiple+i2s
The Seeed board gets around that by using a 4-channel ADC (and analog mic's)
I found a number of discussions of multiple mics, but it's not easy: https://www.google.com/search?q=raspber ... ltiple+i2s
- principemestizo
- Posts: 5
- Joined: Sat May 01, 2021 11:04 am
Re: More than 2 Adafruit I2S MEMS microphones
Thanks for your answer. I will use 2.
I have a question: do you know the range of the microphone? I don't see anywhere that says so.
I have a question: do you know the range of the microphone? I don't see anywhere that says so.
- danhalbert
- Posts: 4687
- Joined: Tue Aug 08, 2017 12:37 pm
Re: More than 2 Adafruit I2S MEMS microphones
Microphones don't have ranges, but they have sensitivities. Here is the datasheet: https://media.digikey.com/pdf/Data%20Sh ... LM4H-B.pdf. You could compare that with other microphones.
Please be positive and constructive with your questions and comments.