The x42-plugins set is now available in the Ubuntu repo.
x42-plugins is the amazing work of Robin Gareus (http://gareus.org). The set contains
- convo.lv2 – plugin to convolve audio signals
- meters.lv2 – a collection of audio-level meters with GUI
- tune.lv2 – a musical instrument tuner with strobe characteristics
The version in the repository is the latest from github: http://github.com/x42/x42-plugins