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----- Original Message ----- From: "Jesse Ray Lucas" <jlucas@neoprimitive.net> > Not sure about these "record" things, but my father told me once that the > phono input on a receiver applies a special EQ to the input signal. You > can't just run it into a normal jack, or it will sound all brittle and >lack > any low end. Probably doesn't help you. But... That's called the RIAA curve. (There have been a few other EQ schemes over the years but this one applies to all LPs.) This is a specific curve applied to the signal from the master tape on its way to the cutting lathe. It (1) cuts the bass to keep the grooves from becoming too wide and deep (simplixtic answer) and (2) boosts the treble ranges to increase the signal-to-noise ration (S/N) where the musical energy is small. By applying the inverse curve to the signal coming from the phonograph cartridge, the bass is restored while the treble is cut back, taking with it all the groove noises (pops, clicks, scratches, diamond rubbing vinyl, etc.). Those of you born after the CD came to market might marvel at all the funny things people did to make sound fit into vinyl grooves. EQ, limiting, compression... None of which need to be done for soundwaves being digitally encoded into pits of a CD. Cheers, Bill =============================================================================== Host of EMUSIC, an electronic, ambient, and space music show. Thursdays at 11 pm on WDIY 88.1 FM, Allentown and Bethlehem and 93.9 FM in Easton and Phillipsburg. http://wdiy.org/programs/emusic All times are GMT-5:00 Listen on-line to WDIY at http://wdiy.org and click LISTEN To subscribe to the EMUSIC on WDIY list, go to http://groups.yahoo.com/group/emusic-wdiy and click on [Join This Group!] Host of the AM/FM Show on WMUH Allentown 91.7 FM every other Saturday at 6 am. Host of Afterglow on WMUH every Thursday morning from 8:00 to 9:30. http://soundscapes.us/~bill/amfm http://soundscapes.us/~bill/afterglow Listen on-line to WMUH at http://www.muhlenberg.edu/wmuh and click REAL AUDIO Personal site: http://soundscapes.us/~bill All times are GMT-5:00 SOUNDSCAPES Concert Series: http://soundscapes.us