Sorry to have wasted time with the installs (and probably uninstalls),
all the .m** files work here .. and I don't have QT or iTunes installed. I think Nero 9 did it if I recall correctly.
Other machines here (kids and wife) play these formats in WMP, so playbeack there may be a false positive. WMP (via Windows) has separate 'read' codecs than 'decode' codecs. MP3 is an example of that.
Standard Windows install lets WMP play all kinds of MP3 bitrates .. but if you try to record or recode using the same codec no dice. I guess it's OK one way and not the other according to their license for MP3.

May be the same for m4a.


I do not work here, but the benefits are still awesome
Make your sound your own!