extace software package provides waveform viewer, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install extace
extace is installed in your system.
Make ensure the extace package were installed using the commands given below,
$ sudo dpkg-query -l | grep extace *
You will get with extace package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Sound |
| Package | extace |
| Version | 1.9.9-7 |
| Description | waveform viewer |
| Sub Section | Sound |