I can make a partial answer, not having a Dragon.
When I set the azimuth properly using a scope my Naks, and then bring it into the computer and try RX azimuth on it, I rarely get more than 0.01 sample azimuth correction across a whole side of a tape. It is essential to set the azimuth to the tape, which makes up for the incorrect azimuth on the recording machine.
Having a perfectly aligned playback deck is irrelevant to an old tape that was not “perfect” - that is why azimuth setting is so important!
MY joy at having Nakamickis now is because I have always set the azimuth for playback transfers. but it is just deucedly difficult on some machines, and the more you fiddle with it, the harder it is to have it stay accurate.
And many or most of the cassettes in the 1500 that I am working my way thru were recorded on auto-reverse Marantz PM-510s, so the azimuth canm be different on each side, and different on successive cassettes. Thus it is vital to set it for each and every side of each cassette.
That’s why I love having a front panel knob to adjust and I can leave the tiny Phillips screwdrivers in the shop!
> On May 6, 2019, at 6:42 PM, Abhimonyu Deb <[log in to unmask]> wrote:
> If we assume that a given cassette was recorded on another machine with improper record head azimuth, then how can there be any substantial high frequency energy in the recording at all?
> Therefore, if, instead of playing this cassette on the Dragon, we play it on any other machine with perfect playback head azimuth alignment but without NAAC, are we gaining any high frequency content? Yes, there will be phase error between the two channels.
> Now, let us suppose that we digitize this cassette from the machine with perfect playback head alignment (without NAAC). Then suppose we apply azimuth correction processing such as Izotope RX dynamic auto-azimuth correction to correct the phase issue.
> Will the result be substantially different from digitizing from the Dragon (purely from the azimuth point of view)?