the External microphone is not working

[hero1980]

When I use External Mic it does not work only the internal Mic working
I used many types of microphones but still does not work
is there kind of activation from code?

[Dylan_K]

This has been discussed at length in other threads. Here is a recent one:

external Microphone

I am assuming with ‘tolerance’ you mean the value to the THRESHOLD command? Dropping that value to 1 puts the internal noise threshold at 1%. This means that some MOVI boards will become completely unresponsive as the noise induced by the AGC will be interpreted as speech most of the time. 2% is really the lowest we can safely go. In fact, there is a reason I made the default 5%. Having said that, let’s look at your concrete problem. I haven’t tried your circuit yet (thank you so much btw., …

Bottom line, you’re going to need to buy or build a powered microphone and an attenuator circuit. I also talk about a voice bandpass filter if you’re operating in a noisy environment; that piece is optional.

[hero1980]

@Dylan_K

voice bandpass filter

I would like to buy them so could you please send me a link for powered microphone and an attenuator circuit and also voice bandpass filter because I am working in a very noisy environment.
thank you

[Dylan_K]

Click on the “external Microphone” link above. Everything should be detailed there. It’s a bit of reading but a worthwhile read to understand why all of this is necessary.

[hero1980]

Mr. Dylan_K i bought this Microphone

https://www.amazon.de/gp/product/B01F84YMZQ/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1

it is a Stereo Type Mic as i think , and still when i connect it to the Movi it does not work
only the internal Mic is working , please Help what to do ?

[Dylan_K]

For it to work at all, it needs to be a mono microphone, not stereo. But even if you get an adapter, it won’t work very well as it’s just a passive mic, not a powered one as discussed in the thread I linked above.