The Spectrum Analyser is a free audio spectrum analyser for your microphone. It has been developed with the purpose of making it easy for you to analyse and compare the sound pressure level (SPL) of your microphone with the audio signal of any other microphone or audio source in your room.

This app is able to analyse and calculate the frequency spectrum of the sound signal that is captured by your microphone. This can be done in a number of different ways. The most common way is by using the FFT (Fast Fourier Transform) algorithm. This algorithm can be used to analyse any signal that has a sound pressure level. The output of this algorithm is a set of complex numbers, or more commonly, a vector of real numbers and an imaginary number. This vector contains the information about the frequency and the corresponding amplitude of the sound.

Another way to analyse your microphone is by using the discrete Fourier transform (DFT). This is a mathematical algorithm that can be used to calculate the Fourier transform of any signal. The output of this algorithm is also a set of complex numbers.

The Spectrum Analyser is also able to analyse the sound captured by your microphone with the help of a digital signal processor. This processor can be used to analyse and compare the sound captured by your microphone with the audio signal of any other microphone in your room.