Use of audacity with openmpt

Since openMPT is very useful in creating music, where do you get the samples for making instruments, to enter in the pattern editor?
A surprising thing I found out is that you can import such file extensions such as wav, aiff and FLAC files from audacity, to be used in openMPT. Audacity also comes with a metadata editor, for use with openMPT too. So you don’t need to go online and download.