The Needlesound application represents a VU meter adjustable react in real time to the sound received by the microphone smartphone. Changes in volume, captured by the microphone smartphone are represented by a decibel scale. The frequency response of the microphone depends on various smartphones and behavior of the needle may vary accordingly. It simulates a high-fidelity power amplifier VU meter, and can be used in the musical atmosphere at high SPL.
The author's pseudonym: Nexminup.
Since version 1.2, Needlesound incorporates a sound spectrum analyzer.
Version 1.3 features a playful representation of the spectral analysis.