It is an application program that in real time displays the spectrum of the voice input from your Android phone's microphone. A horizontal axis is a music scale. A display position can be adjusted by dragging horizontally. Scaling of the display range of a scale can be carried out in pinch zoom operation.
Use the opportunity to get the setup package of Audio Spectrum Monitor 1.5.1 free of charge and read users' reviews on Droid Informer. The app is available for Android 4.0 and above. It's safe to download this application. The tool was originally designed by TadaoYamaoka and it is included in the Music & Audio category.