I have just been using the sound recorder that comes with little reader.
Please note that the Sound Recorder that "comes with little reader" does not actually come with LR.
That is actually the WINDOWS SOUND RECORDER, yes, the same one Nikki was referring to that you can find in your Windows start menu, accessories section.
In the next build (1.06), LR
will come with its own "Easy Voice Recorder". For now, best to use the program Nikki mentioned to do your conversions. With EVR, all audio recorded will be saved in mp3 and the size will be quite small.