Linux Multi Media Studio or LMMS is application audio editing for linux (ubuntu) to install this application there are two ways, from PPA or downloaded packages. Here we will install from PPA, to install it we need add PPA sources, go to terminal, login as root by type :
$ sudo su
$ add-apt-repository ppa:gwibber-daily/ppa
After it, update your repository by type :
$ apt-get update
Now install it by type
$ apt-get install lmms
Other Step, you can download this packages here
Happy Testing...!!