woheller69 / audio-analyzer-for-android

A fork of audio-analyzer-for-android in Google code, with a lot of enhancement.
Apache License 2.0
184 stars 12 forks source link

Max range 4kHz #10

Closed orbisvicis closed 1 year ago

orbisvicis commented 1 year ago

I'm looking for a spectrogram that can analyze lower-ultrasonic frequencies. I'm curious to know why the max range of this app is 4kHz.

woheller69 commented 1 year ago

simply increase the sample rate

That is a consequence of https://en.m.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem