• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 143
  • Last Modified:

Getting freqeuncy of an external input

Hi,

how can i get the frequeny of an external input (like a guitar)?
0
duke2000
Asked:
duke2000
1 Solution
 
davidhusselmannCommented:
Hi,

This is potentially a very hard problem.  The algorithm you use for this is the Fast Fourier Transform (or FFT) - but usually the sound from musical instruments such as the guitar consist of many frequencies (called harmonics), so you'll end up with a jumbled mess of frequencies out the other end of the FFT.  You'll have to find out which frequency you need and filter the rest out.

There are many FFT components available for Delphi online.  You'll find one of them here: http://teachme.tuwien.ac.at/lo/fourier.html

Good luck
David
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Cloud Class® Course: Microsoft Azure 2017

Azure has a changed a lot since it was originally introduce by adding new services and features. Do you know everything you need to about Azure? This course will teach you about the Azure App Service, monitoring and application insights, DevOps, and Team Services.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now