I have an .avi that I've resized using AviSynth, and am trying to compress in VirtualDub back into a manageable .avi size. The video compression works just fine, but when I try to compress the audio, the only options that are available for the MPEG Layer-3 are for 24kHz and below. The original .avi file, according to GSpot, has MP3 audio with stereo 48kHz at 128 kb/s, which is how I'd like to recompress it. Is there something I'm missing, some codec that's required to allow me to recompress it back to 48kHz? GSpot declares I have all the codecs installed that are necessary, so shouldn't I be allowed to compress it again?