A visualization framework for sound recorded from the microphone. Three different visualization styles are currently available:
- an oscilloscope,
- a spectral intensity plot, showing sound intensity as a function of frequency,
- a sliding window spectrogram, with time on the horizontal axis, frequency on the vertical axis, and intensity encoded with color.
There are a number of keys (currently hard-coded) that flip between the displays and change their parameters:
| Command |
Keyboard shortcut |
| Exit program: |
Escape |
| Next display type: |
d |
| Previous display type: |
SHIFT + d ('D') |
| Next input source: |
i |
| Previous input source: |
SHIFT + i ('I') |
| Command |
Keyboard shortcut |
| Reset axes: |
r |
| Log scaling for frequencies: |
l |
| Log scaling for amplitudes: |
SHIFT + l ('L') |
| Zoom in frequency domain: |
= |
| Zoom out frequency domain: |
- |
| Shift frequency domain up: |
UP |
| Shift freq. domain down: |
DOWN |
| Increase gain: |
SHIFT + = ('+') |
| Decrease gain: |
SHIFT + - ('_') |
| Move amplitude range up: |
RIGHT |
| Move amplitude range down: |
LEFT |
| Command |
Keyboard shortcut |
| Reset axes: |
r |
| Flip axes visibility: |
a |
| Flip grid visibility: |
g |
| Log scaling for frequencies: |
SHIFT + l ('L') |
| Log scaling for amplitudes: |
l |
| Zoom in frequency domain: |
SHIFT + = ('+') |
| Zoom out frequency domain: |
SHIFT + - ('_') |
| Shift frequency domain up: |
RIGHT |
| Shift freq. domain down: |
LEFT |
| Increase gain: |
= |
| Decrease gain: |
- |
| Move amplitude range up: |
UP |
| Move amplitude range down: |
DOWN |
| Command |
Keyboard shortcut |
| Reset axes: |
r |
| Flip axes visibility: |
a |
| Flip grid visibility: |
g |
| Next display style: |
f |
| Previous display style: |
SHIFT + f ('F') |
| Flip starting at zero cross: |
s |
| Zoom in amplitude: |
= |
| Zoom out amplitude: |
- |
Display style cycle is: (lines only, lines and dots, dots only)