.wma and .m4a files splitter with least amount of loss

[waterdrinker]

I have some .wma and .m4a family history files that need to be split. It is crucial that sound quality be preserved as much as possible.

I am having trouble finding a file splitter for .wma and .m4a. I did not see a category for audio file splitting here at techsupportalert.com.
I tried Format Factory. Format Factory did not seem to “split” a file but rather it seemed to “convert” the file to a different length. To me a significant amount of sound quality would be lost, right?

I need a recommendation for an audio file splitter that will cause the least loss of sound quality.
Thank you

[Anupam]

You can find a list of free software here:

http://listoffreeware.com/list-best-...tter-software/

[waterdrinker]

Thank you.