On 20/12/2010 00:11, Dave Plowman (News) wrote:
In article ,
JNugent wrote:
I can still cope with pretty well any 1/4" tape here at home, with the
exception of 30 ips.

You can just spin them into the computer at 15ips and adjust the sample
rate to convert them...!

Ok if you just wanted to listen to it. But the equalisation will be wrong,
and you'll lose the extreme bottom end. So I'd advise anyone with 30 ips
tapes to have them copied properly - since they are likely to be of
important stuff.

Just checked - an old copy of Wireless World had a DIY tape recorder design
with pre/de-emphasis time constants inversely proportional to the tape
speed.
So the frequency response will be correct when playing back at a
different speed.
(Dolby would still screw it up though.)

--
Eiron.