Ten Minute One-liners for the Curious: https://www.youtube.com/@10minute1liners

In this video, I show how to make a dual voice track editor using Matlab. The code can be found at https://www.innovationincrisis.com/10minute1liners/episode-t3 and downloaded here. The code dualvoiceedit.m requires SpectralCentroid.m (below).  Also included is getjsonwords, a shell script that extracts word and word times from a JSON file produced by OpenAI Whisper.

References:

To run 

GITHUB code for Spectral Centroid: https://github.com/edk26/Common-Matlab-Functions/blob/master/SpectralCentroid.m

Tools:

• Matlab R2024b Update 5 (24.2.0.2863752) 64-bit (glnxa64)

• Details:

The different features of this minimalist editor are as follows:

1. Reads in two audio voice files and two transcript files

2. Speaker volume setting for each track along with continuous cursor/mouse signal value

3. Both voice signals and spectrum centroid signals shown

4. Scroll down strip chart

5. Play and stop cursors

6. Zoom in and out, one or both tracks

7. Select time interval and delete/zero out audio

8. Select time interval and insert/overwrite audio

9. Select and raise/lower track region volume

10. Go up and down the edit version tree