The pre-signal is (was) actually one of my challenges. I'll come to this topic later.zdenek wrote: ↑Sun Nov 19, 2023 2:27 amHow do you implement variable turntable slide travel and knife pressure with synchronization of the delayed audio signal?
What I mean is that the support has time to position itself in the right place before the sound so that the knife does not enter the adjacent recorded groove, as is done in German machines with the Studer A80 tape recorder, as it is done professionally, one head first gives the signal to servo of the head support mechanism and then about a second later, at 33rpm, the second reading head of the tape recorder sends a signal to the cutting head. What delay computer program do you use, or do you use a tape recorder with two reading heads?1280px-STUDER_A80_Master_2_Track_Recorder,_Mastering_Version.jpg
But to summarize briefly:
After I had ruled out using a Studer tape machine with two heads (too expensive, too rare and not up to date), I looked for alternatives. At first I wanted to use a digital delayer. But that was also too impractical for me. Instead, I play the digital music signal twice. With a time offset of half a turn of the record (about 1 second at 33 rpm). I then have stereo pre and stereo signal (and MIDI signals for control) via a MOTU M4 audio card. That works.
