Install gjacktransport by entering the following commands in the terminal:
sudo apt update sudo apt install gjacktransport
Description:
access to the JACK's transport mechanism as touchable slider
G. JACK Transport is a standalone application that provides access to the Jack Audio Connection Kit's, JACK transport mechanism via a dynamic graphical slider. . In other words: this software allows to seek Audio/Video media files when they are played along jack transport. Intended for audio-engineers or A/V editors that work with Ardour, Ecasound, Hydrogen, Xjadeo, etc. . Additionally it provides G. JACK Clock, a "Big Clock" display for jack-transport.
Homepage: http://gjacktransport.sourceforge.net/
Version: 0.6.1-1build2
Section: universe/sound