Sonic Visualiser is a free, open-source application for Windows, Linux, and Mac, designed to be the first program you reach for when want to study a music recording closely. It's designed for musicologists, archivists, signal-processing researchers, and anyone else looking for a friendly way to look at what lies inside the audio file.
Sonic Visualiser version 4.2 was released on 14th August 2020. Download it here!
Sonic Visualiser is one of a family of four applications from the Centre for Digital Music:
Sonic Visualiser itself is the most general, a program for highly configurable detailed visualisation, analysis, and annotation of audio recordings.
Sonic Lineup is for rapid visualisation of multiple audio files containing versions of the same source material, such as performances from the same score, or different takes of an instrumental part.
Tony is for high quality pitch and note transcription for scientific applications, designed primarily for solo vocal recordings.
Sonic Annotator is a non-interactive command-line program application for batch audio feature extraction, using the same feature extraction plugins as Sonic Visualiser.
READ MORE: https://www.sonicvisualiser.org/
Supplemental: Keith J Clark has been using this software since at least December of 2018 for live spectrograph images using sound. Demonstrated in the following videos: