set_volume() causes song to stop playing.

[rhaejr]

Issue Report

Description

After a fresh install of Rasbian and getting all my packages redownloaded the songs I am playing with my project just stop anytime I try to use the set_volume() method. Everything worked fine before I reloaded the OS. I can't figure if I have missed some setup that I had done before or what.

Problem reproduction

Fresh Install with dependencies
player = OMXPlayer(song)
player.set_volume(-1500)
Audio drops out completly

Environment details

• OS (lsb_release -a):

Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 10 (buster)
Release:        10
Codename:       buster

Software	Version
python-omxplayer-wrapper	0.1.0
python-dbus (dpkg -s python-dbus)	1.2.8-3
python (python --version)	3.7.3
omxplayer (omxplayer --version)	f06235c

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