Error: I need Lame_enc.dll to encode MP3!

The LAME dll is not included in the distribution of Reaper. You have to find it and download it yourself. for example, heres one I found in google : it says for audacity, but it's just the dll. unzip it into your reaper directory I think.

Ok that is what I thought but wasnt sure. Thank you! what encoders do you guys use on here? or does it not matter which one I use?

i heard there's a different version of lame called lame mt (as in multithreading) any thoughts on that? for a long time i used mpeg suite which was really fast and had decent quality with whatever default codec it came with.

I use lame when I need to put up mp3s for quick listening, but I don't really have a need to export to a compressed format much. I also own a copy of Cubase that comes with a Fraunhofer MP3 encoder, but meh, LAME does the trick.

I use an old lame enc.dll which does nicely. I think I got it by installing WinLame. Just copy it to your Reaper folder. Kind regards Dave Rich

There's a link in the Reaper manual (ReaperUserGuide):