Frequency-wave

Frequency-wave is a program that visualizes sound coming from MPD. It can do so in three different ways: as a waveform, by plotting amplitude vs frequency, and by rendering a 3D surface spectogram.

Demonstration

YouTube demonstration (enable annotations)

Features

3D surface spectogram

Waveform

Amplitude vs frequency

How to use

Dependencies

• MPD

Build dependencies

• freeGLUT
• libGL
• libGLU
• FFTW

Building

Frequency-wave can be built by running

$ make

in the root directory of this project.

MPD setup

MPD needs to be configured to create a FIFO pipe to which raw samples will be written during playback. This can be done by adding the following to your MPD configuration (normally in ~/.mpd/mpd.conf):

audio_output {
    type                    "fifo"
    name                    "my_fifo"
    path                    "/tmp/mpd.fifo"
    format                  "44100:16:1"
}

Controls

Key	Description
1	Waveform-mode
2	Amplitude vs frequency mode
3	3D surface spectogram mode
x	Toggle between logarithmic and linear frequency scales