can't open m4a?

i remember i used to be able to open .m4a on renoise but after i got the 2.8.1 update i can’t seem to do it anymore. does anyone else have this problem?

You mean you could you load M4a on Renoise 2.7 and lower but not since 2.8.0?

2.8.0 uses the Microsoft codec library on Windows at least and stopped using the quicktime library for that…So you would need an M4a codec for your windows environment.
I don’t know how this works for Mac and Linux though.