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There are numerous instruments available and you can mix them however you want. Also, the software comes with a good number of samples.
If you feel that LMMS is lacking something, you can extend its functionality through various plug-ins, which are available online.
The user interface has a built-in file explorer, which makes it much easier to locate local media files and to manage projects.
The software is developed for numerous Linux distributions, as well as other operating systems, including Windows and Mac OS X.
The interface and its controls may seem intimidating at first, but you can find a huge amount of helpful information on the software's website.