I'm sorry if my e-mails are still not headed properly! I hadn't heard about it for so long that I assumed the problem had fixed itself. I have tried with no success to correct the problem.
When I talked about phase reversal when a track is played backwards, it has nothing to do with azimuth, I'm talking specifically about the polarity of the audio, which will be inverted whether the azimuth is correct or not.
On Monday, March 9, 2015 7:44 PM, Richard L. Hess <[log in to unmask]> wrote:
[DAVID B you are still sending messages with a Reply To only you
header...hence the delay in this coming through. I had to resend.]
Lots of good comments in this thread.
I agree with all of them but offer this caveat. IF Tom Diamant meant
that over time, all the tapes were recorded on different recorders BUT
if he is pretty certain that each tape was recorded at the same time on
the same recorder, then you can often recover the two tracks together.
The geometry is such that the azimuth error will be the same for both
tracks (assuming your two-channel repro head doesn't have differential
azimuth between tracks). Unless there are azimuth HF tones on both sides
of the tapes, you'll be as close as you can get if the tape was recorded
on the same machine in the same session.
Sometimes there will be a batch of multi-mono tapes (two or four track)
that were all recorded at the same session and you're quite certain that
only one machine was available for that convention or meeting or whatever.
But, I was going to say (and David Burnham beat me to it) you need to
reverse azimuth of the reverse track IF THE FORWARD TRACK HAS ABSOLUTE
POLARITY. If it does not, you might wish to reverse the forward track
On 2015-03-09 3:49 PM, DAVID BURNHAM wrote:
> As was discussed in New Orleans in 2010, when you run both channels at the same time, (one forwards, one backwards), the one running backwards will have its phase or polarity reversed.
> On Monday, March 9, 2015 3:43 PM, Dave Radlauer <[log in to unmask]> wrote:
> Hi Tom, long time.
> I've had no problem dubbing mono 1/2 or 1/4 track simultaneously.
> In my case from *J-corder* modified Technics 1520s.
> Dave Radlauer
Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada 647 479 2800
Quality tape transfers -- even from hard-to-play tapes.