Android Midi Pad is project uses the touch capabilities of Android-enabled devices to send midi messages as would do a 2D pad used in music production systems.
A connection is made to a computer via bluetooth, and a server build using python on it is paired to the device and receives messages from it. Those messages are then sent to a virtual midi bridge
AudalyzerAndroidVersion: 1.15 updated Upload Date: 10 Jun 11
Audalyzer is a simple audio analyzer for Android. It displays sound readings from the microphone as a waveform display, as a frequency spectrum, and as a dB meter. dB levels are relative to the maximum input level of your device