by Arne Elster (23 Submissions)
Category: Sound/MP3
Difficulty: Intermediate
Date Added: Wed 3rd February 2021
Rating: 
(6 Votes)
This is just a little demonstration on how to do frequency detection on digital audio signals.
You can generate a signal from a DTMF sign (numbers, chars), which consists of 2 frequencies,
and the program will detect it by using a Görtzel algorithm.
Frequencies + Detection musn't always mean FFT.
Sometimes there are faster ways.
VBcoders
