Vocle is a Matlab tool to view, play, and compare audio signals.

Features:

• Load workspace signals or sound files
• Play signals or segments
• Blind A/B test two signals
• View spectrum, on linear or perceptual scale
• View spectrogram
• Mono and stereo support

Usage

• Vocle([fs,] x, y); Open vocle with signals x and y, optionally setting the sampling rate to fs
• Vocle('x.wav', 'y.mp3'); Open vocle with files x.wav and y.mp3
  Vocle reads unrecognized file types as headerless 16-bit mono files. For these you can specify a sampling rate as the first argument (or just set the sampling rate later in the menu). You may also combine signals and files in the input arguments.

Navigation Mouse:

• Left mouse: Select/deselect signal
• Left mouse + drag: Highlight segment
• Right mouse:
  • If highlight exists: Zoom to highlighted segment; remove highlight
  • Otherwise: Zoom out
• Double click left: Zoom out full
• Mouse click outside axes: Remove highlight
• Mouse scroll: Zoom in or out
• Shift + left/right mouse: Play start/stop Keyboard:
• Space bar: Play start/stop
• Arrow left/right: Scroll horizontally
• Arrow up/down: Zoom in/out

Vocle is inspired by Thomas Eriksson's spclab, and shares some of its behavior.

Vocle requires Matlab 2014b or newer.