Very well described, Richard! db Sent from my iPhone > On May 6, 2015, at 8:31 PM, "Richard L. Hess" <[log in to unmask]> wrote: > > Hi, Tom, > > When measuring phase shift in degrees, it is relative to a given frequency. So, a 180 degree phase shift at 1 kHz would be the same time delay as a 360 degree phase shift at 2 kHz. > > A polarity reversal is independent of frequency/wavelength. When it used to go up, it now goes down and vice versa. It is also a binary function: in or out of polarity. > > I think 99% of the time when we say 180 ° phase shift, we mean polarity flip as we want it at all frequencies to be the same. > > Cheers, > > Richard > > > >> On 2015-05-06 8:23 PM, Tom Fine wrote: >> So is it correct to say that there can only be a polarity reversal >> (180-degrees) whereas there can be any degree of phase shift? >> >> -- Tom Fine > -- > Richard L. Hess email: [log in to unmask] > Aurora, Ontario, Canada 647 479 2800 > http://www.richardhess.com/tape/contact.htm > Quality tape transfers -- even from hard-to-play tapes.