Having bought better speakers for my computer(s), I have caught the music bug yet again. So I have just re-ripped ~500 CD's into Apple lossless and I can (still at 62) hear the difference. So now I wish to rip ~600 albums from my youth. Collection runs he gamut and it is in very good condition. I have Kirk's Take Control book for Audio Hijack. I'll be using my old Thorens 126 turntable (still good after all these years) and a Nakamichi PreAmp for the Phono pre-amp stage. Bring that into a rMBP15 via the RCA-mini plug? My big question is - who/what performs the ADC function? With all the praise being made for dedicated DAC's, is what I am about to use good enough? Is there other ripping SW? I really only wish to do this once. ;-) Many thanks.