Skip to content


Subversion checkout URL

You can clone with
Download ZIP
Uses given peak data to infer some basic psychoacoustic data about a waveform. Licensed under the WTFPL.
Fetching latest commit...
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.

Peak Harmonics Ratio Calculator

This program takes in a data file containing rows populated by both a frequency and a dB value of a given peak in a spectrum. It treats the first peak in the list as the fundamental frequency, and from that calculates the sum of all of the peaks that are harmonics of the fundamental vs. the sum of all the peaks that are non-harmonic to the fundamental (note that for each frequency it allows for a 3% error deviation from what the ideal harmonic should be). The number will be between 0 and 1, and the closer it is to 1, the more likely the sound that these peaks came from has a definitive pitch to it.

This is a very simple and non-robust program, written for a lab I was doing for my acoustics class but it gave me a chance to program in Scala which I've been wanting to do for a long time and perhaps somebody somewhere besides myself will actually find this useful.

Peak Data File Format

This program expects a very specific format for the data file. Each line should be formatted exactly as follows:

{frequency} {amplitude_in_db}

Where {frequency} corresponds to the frequency value of a specific peak and {amplitude_in_db} corresponds to the amplitude of that frequency in dB. There should be one newline character at the end of every line. The program is very finicky about this format.

Building/Running The Code

You will need:

  1. Scala

  2. sbt

Once these are installed and on your $PATH clone this repo, cd into it and then

$ sbt run

That should do it. To give it a custom file try

$ sbt "run $FILE_NAME"

License: WTFPL

This program is free software. It comes without any warranty, to the extend permitted by applicable law. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See for more details.

Something went wrong with that request. Please try again.