Why my recording audio have a low gain and have noise?

Lding

New Metal Member
Feb 24, 2017
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Hi,I am trying to record audio using the MAX4466 op-amp and VS1053 shield that I bought from Kynix. 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’m not able to listen to what is actually being recorded.


The recordings are marred by some noise . 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?