If you need to create an audio recording, e.g., to record a lecture, etc., you can do so on a Mac OS X system using the QuickTime Player application that you should be able to find in the
/Applications directory
on the system. When you have completed recording, you can save the file
in the MPEG-4 Part 14 multimedia container format as a .ma4 file. If you
wish to convert the file to another format, you can convert it with
iTunes or the afconvert utility
that comes with the OS X operating system.
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