NEMa - note energy matrix

NEMa - note energy matrix. App records sound (30sec) and calculate recorded sound spectrum.
Spectrum is calculated and shows as note energy matrix or as note energy chart.

There are two modes to calculate NEMa:
1) Accurate, in this mode range is 0.6% of the base frequency (note frequency);
2) Rough, in this mode, one note interval goes into another note interval.

The app record audio from C2 note ( 62 Hz) to B7 note ( 3960 Hz).
NEMa contains of 12 notes (C, C#, D, D#, E, F, F#, G, G#, A, A#, B) and 6 octaves.
Quantization: 16 bit.
Sampling rate: 8000 Hz.

NEMa an easy-to-use app:
1) Press Microphone button to start record;
2) Recording will take 30 sec and when it will show NEM (note energy matrix);
3) Press Chart button to show note energy chart.

To get more accurate results, you need to keep the audio source closer to the phones microphone.