I am trying to record audio using the MAX4466 op-amp breakout from Adafruit (
link) and VS1053 shield (
link)that I bought from Adafruit. I am able to record audio by connecting OUT --> MICP, GND --> MICN, GND -> GND.
The recorded audio seems to have a very low gain i.e. I am barely able to hear what has been recorded in a room. I tried varying the gain using a potentiometer. The recordings are generally noisy so I am not able to listen to what is actually being recorded.
The recordings are marred by some noise (Link for the
sample). While I am not trying to achieve high quality audio using an arduino + a breakout on a breadboard, I would like to record any conversation within a few feet (of course with the consent of people being recorded).
My questions are:
a) How do I avoid the noise that is affecting the quality of the recording?
b) How do I improve the gain of the recording so that I am able to hear something when I play the recorded file?
c) If it is not possible using the MAX4466 breakout, is there an alternative to record the audio?