Wav to ac3 for Spruce

[zerohash]

Dear Friends,

We are doing profssional DVD Authoring using Spruce hardware and software.We get Digibetas in Pal but we have to convert them to Ntsc for export.The Hi-8 tapes are also in Pal format.Now my Video becomes 25 to 29 and so i have to convert my audio too.I do all this work in ProTools.
After matching the sound with video i play back my ProTools and capture in my encoder in real time.So ProTools 5.1 Wav files becomes 5.1 AC3.But it takes real time.3hrs movie takes 3 hrs to dumpback.
I am looking for a pro S/W which convert my 5.1 Wav to 5.1 AC3 which will be used in Maestro.Please suggest me some Sotwares which do this job.I am using Mac for Protools so i need Mac S/W. It should also show Dolby logo in Amp after replicating the DLT.

I have heard of Softcode but i havent tried it.someone said that we cant increse the levels above 0db.Please suggest me more Softwares of Pro level.

Thanks.

Zerohash.

[guns1inger]

Surcode (http://www.surcode.com/) make pro level encoders that accept wav or aiff files, however the manual only refers to a PC version. Steinberg have Nuendo, which has a Mac version.