popjones

Also, I tried running the mic ground to the audio shield and alternately to the ground rail on the PCB--no apparent change in quality (a post on another thread suggested grounding to the shield was quieter). Does this make a difference? My power...

Some progress. The drone tone mentioned above is related to my Neopixel code. As it cycles through it sounds like an LFO. I unplugged the LED ring and it went away. The sound quality is quite poor on this mic/board (Max 4466), very distorted...

So it looks like I don't need the external preamp (red board in photo above) as one is built into the mic (purple board above). I am running one mic left, one mic right into the Line In on the audio shield. I get good volume from the mic board...

Thank you all for your help. Standing on the shoulders of giants! See my diagram and photos of wiring. I did some testing today running the mic directly into a headphone monitor (basically a preamp with a headphone jack) and it was insanely...

No reply in the Project Guidance Forum, maybe Audio is where I should post this: I'm trying to use 2 mono mics for a binaural signal. I have these going into a preamp and then into the line inputs on the teensy audio board. No signal is coming...

Any ideas? Paul? Should I ask this in Audio?

I ran across this reply to another post. I am running both mics into ONE preamp and then into the line level input on the audio shield. Maybe I need a separate preamp for each mic?

I'm trying to use 2 mono mics for a binaural signal. I have these going into a preamp and then into the line inputs on the teensy audio board. No signal is coming through. Am I mistaken in thinking the preamp will bring the mic level up to line...