I just learned that I can make a sound in perl by printing "\a" as part of my string.

\a just prints the BELL character to the terminal. It's actually up to the terminal to decide what to do. Typical settings are ignore, audio bell, visual bell. It typically won't make a sound on my systems (xset -b).

are there other sounds and ways to make sounds in perl without the use of files or modules?

Without *files*? Not really possible, if only because perl itself is a file. Without modules, of course. Anything can be done with modules can be done without modules.

You probably wanted to ask something else - but I'm not sure what.