changing multiple file extensions

[asmith3006]

Hi,
I want to change multiple files from .m4a to .m4b as this makes them appear as AudioBooks in itunes apparently.

First of all, is this right? Second of all, is there an easy way to do it? (I have about 100 files in different folders I want to change)

Thanks.
Andrew.

 

[Mitthrawnuruodo]

Here you go.

 

[asmith3006]

Excellent thank you 🙂

For future reference though, can a multiple rename be done in the terminal?