I will not comment on your code, I like the idea of suspending jobs, but it would be better to use mpg321 remote interface, it's simpler and IMHO much more cleaner. If you really need to suspend execution, you could save the player status and restore it later, it's not difficult using one of the available modules on CPAN; I would start from
Audio::Daemon::MPG123, Audio::Play::MPG123 or MP3::Daemon.
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