Inch and ips { explanation in recording and playback on master tapes and reel to reels ~

Hi there;

i just think is a very good thread to discusse and explain and share comments and experience of the differences of inches and ips in tape (reel to reel) recordings and playback!

so lets star first how many inch and ips do exist and what is it?

more questions are comming as time goes bye…
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Regards