You can try before you buy on just about any music or software Using WinMX. The latest version of this client share program has access to all existing open networks on the internet. It'sort of like about five napigator's in one....around 400 active open nap networks. I personally can hear the remnant signature of an mp3 in audio signals that had a compression bitrate of less than 160. By spectral wave, the new signal has an overall conical shape if we were able to see the sound waves we hear and average them up or down in resolution (spectrum analysis). Well there you have it, compression is compression.