best audio editing software for windows 10

[eziowar]

os windows 10 pc
can someone please tell me best free audio editing software which can cut various parts in an audio files and re joine them to make ringtones and also does not changes sound quality of source file and also support m4a files and mp3 as well.

 

[reedo_43]

This may work for you.
http://www.audacityteam.org/

 

[eziowar]

This may work for you.
http://www.audacityteam.org/

but i think it dont support .m4a files, i need a software which supports .m4a files, please any more suggetion?

 

[reedo_43]

http://manual.audacityteam.org/man/faq_installation_and_plug_ins.html#ffdown

 

[skittle]

Of course audicity supports m4a files..