Comparison of Audio Compression

I stumbled across a really interesting link here from Nigel Coldwell comparing different audio compression techniques and bit rate.
To quote his opening lines:

"I've compiled a table containing the same audio sample compressed into different bit rate using several common compression techniques. Namely MP3 (constant bit rate and VBR,) windows media audio, ogg vorbis, AAC and flac. My intention is that you can use this to work out the lowest bit rate at which the audio sounds clear to you. this will depend on the equipment you're using, and your hearing. I firmly believe that if you can't hear the difference then there is no point wasting space."

I'm still a firm convert to FLAC but nevertheless this is a very interesting read and listen. especially if you are space constrained. Check it out here: http://nigelcoldwell.co.uk/audio/