Playback flac 5.1 to AC3 on the fly

[thxbest]

I convert AAC 5.1 to AC3 with ffdshow on the fly, so my AV receiver can get AC3 signal from the HTPC through HDMI.

Now, I would like to get AC3 (Dolby sound) from FLAC 5.1. I assume that I have to convert the FLAC 5.1 as well, so the AV receiver can get Dolby digital signal, right?

Is there a media player that is able to encode FLAC 5.1 to AC3?

What is the easiest way to do so?

Thanks for any advice.

[Selur]

Why not use ffdshow like you do with AAC 5.1?
Aside from ffdshow I know of no solution other than reencoding the files before playback.