well this is about as hot off the press as you can get
i just finished recording in Side 1 of the Spinners Quad LP about half an hour ago with the 'new old stock' AT15Sa cartridge that i got recently but haven't used yet.
(the AT15Sa is a vintage moving magnet cart from the 1970's with a Shibata stylus, made for CD-4 with the necessary higher frequency range ability in order to properly retrieve the 4-channel Quad from the LP. they aren't making these gems anymore sadly and i really lucked out with this purchase but i've been unable to test it out - until today!)
as you can see, everything is
super balanced, all 4 channels - i literally did
nothing. no level adjustment, no EQ, no noise reduction, no speed correction. nothing post-recording at all.
View attachment 97561
i had the CD-4 demodulator controls set for maximum separation (just past 3 o'clock on the pots, that's really as far as you can go before you start to get back to the difference signal!) and the 30kHz carrier level set to 6/10 (i could have pushed it further but distortion started to creep in).
seeing as it'd be impossible for the disc to separate out in this way if the Front Left channel were supposed to be at a lower level, i believe this is closer to how the Blu-ray levels should pan out. if anyone would like a sample or whatever, PM anytime.
i've feel like gone as far as i want to go with this now. i will hold off rating for now because if i were to score the Blu-ray 'as is', i would very reluctantly rate it a "5" and that feels unfair because what is there on the disc sounds great!
Rhino with the mastertapes should be able to produce a Blu-ray that utterly wipes the floor with anything a schmuck like me with a record player can produce and i'm sorry that hasn't happened in this instance. maybe there'll be a replacement, i don't know?