I am using the STM32F407 discovery board and Wolfson pi audio interface. I have a problem in analysing sample values received from MEMS microphone.
I wanted to plot the data sensed by the MEMS microphone, which is just sensing the surrounding environment. So, in order to achieve this, I am using an array of float type (float32_t) to store the samples continuously. After running the algorithm for a few seconds, I am plotting the values. The problem here is, when I am plotting the data, huge values (around 32000) are getting displayed on the screen. And the graph is looking like a continuous pulse waveform.
Are these true sample values? If I want to operate on these samples, can I directly do that?
Some of the threads posted earlier, related to this topic, suggesting me to convert the values into the q0.15 format and then operate on it? I couldn't get a complete understanding over there.
Do I need to do that? If yes, why we need to convert into that format?
