Use APKPure App
Get Spectrogram old version APK for Android
Displays real time graphics representing the sound captured by the microphone.
This app uses a Fast Fourier Transform (FFT) to analyse the sound picked up by the device's microphone in real time.
It then displays the results in the form of a spectrogram. Try whistling some notes to see the effect.
Also featuring a frequency and musical note detector, displayed at the top left of the screen.