3.4.3 on 2.1

Since certain sound features doesn’t work in 2.3 (files with AC3 track only output no sound)
can I restore to 2.1 and install 3.4.3.

Is it supported? Can it do good or worst?

I’m not exactly sure what plugins have problems with AppleTV 2.1. I know you can still use aTV Flash 3.3.1 with AppleTV 2.1 and still have Sapphire, NitoTV, Boxee/XBMC, etc. As far as which plugins might have problems with AppleTV 2.1, I’ll have to let aTV Flash answer that. If you want to try out aTV Flash 3.3.1, just let me know, PM me.