any audiophiles might be interested in this link..
Gets pretty involved..
HOW TO EQ OLD RECORDS:
http://midimagic.sgc-hosting.com/mixphono.htm
recording curves used for producing records before 1964:
http://midimagic.sgc-hosting.com/mixcurve.htm
OLD records pre 1964.. EQ curves for proper playback
generally its for reproduction.. but i like to play wif it sometimes..