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I believe it is inaccurate to say any procedure is always correct. Lou Lou Houck Rollin' Recording Boerne, TX 78006 ----- Original Message ----- From: Goran Finnberg To: [log in to unmask] Sent: Thursday, May 14, 2009 12:56 PM Subject: Re: [ARSCLIST] Technics SP-15 to computer nightmare Malcolm Rockwell: > I always transfer in stereo and then process > digitally to mono. Helps me pick the quietest > channel, or pieces therefrom, to work with. It is well known that always summing to mono gives the quitest transfer that is least distorted. In the past we only had mono pickups and I still prefer to use this type of cartridge as they give the very best quality transfer possible. That we can use a stereo cartridge to replay a horizontal cut only, mono, disk is of course a possibility but we will then get a far higher contaminated transfer with lots of very low frequency disturbances from this type of cartridge sensing vertical disturbances from warp, and disc defects from nonflat disks that can easily be of much higher amplitude than the music itself. When one mono a stereo transfer of a lateral only disk then the inphase components of the mono only signal nets one a +6 dB increase of the actual total signal program level. The uncorrellated, out of phase signals, just pure "Junk" of all sorts, that has nothing at all to do with the actual horizontal only signal engraved, only increases + 3 dB when we mono a stereo replay of a mono source off disk so we net an actual + 3 dB in gain of the wanted in phase mono signal compared to the junk. Then we have the pinch effect and tracking distortions coming off a mono cut sensed by a stereo responding, vertical/lateral, sensing device and the stereo replay will have a much greater content of primarily second harmonic distortion that gives that shattering breakup effects on all FF passages in the music and that glassy sounding treble. The tracking distortion at high levels of modulation at high frequencies can appear really nasty due to several 10s of percent distortion at the high frequencies while replaying mono records in stereo. But mono this and most of it disappears along with a lot of the rumble. Using a mono cartridge that responds +only+ to the horizontal, mono, content ALWAYS provides a much cleaner sounding transfer than replaying in stereo or trying to use one channel, the cleanest, or all other types of using L or R which ALWAYS will be next best compared to use mono only sensing devices either as a pure mono horizontal sensing cartridge or summing L/R of a stereo, horizontal/vertical sensing device to give pure mono. -- Best, Goran Finnberg The Mastering Room AB Goteborg Sweden E-mail: [log in to unmask] Learn from the mistakes of others, you can never live long enough to make them all yourself. - John Luther ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.12.29/2114 - Release Date: 05/14/09 06:28:00