🚀 go-pugleaf

In article <1745@convex.UUCP> forsythe@convex.com (Charles Forsythe) writes:
>yh0a+@andrew.cmu.edu (Yary Richard Phillip Hluchan) writes:
>>44.1 kHz is the rate CD's are recorded at, 48 kHz is the DAT rate.
>
>Actually, there was an old Sony DAT which is being OEM'ed by some pro-audio
>company as a CD-mastering unit that has a switch for 44.1 or 48 -- could
>DAT machines be modified with reasonable effort? I doubt there's anything
>in the storage format that relies on 48KHz.

The R-DAT standard defines 3 sampling rates for DATs: 32 kHz, 44.1 kHz,
and 48 kHz.  The recording rate is encoded on the tape so when it is
played back, the DAT deck automatically selects the proper playback
rate.

DAT decks, like VCRs, can record and play at different rates.  Which
rates are supported by a specific model is a decision that the
manufacturer makes when they design and market the product.  If the
deck isn't designed to record at 41.1 kHz, then I doubt that it would
be feasible for any home hacker to modify it to do so.

What does happen, is that a company will design a product that can
record at 44.1 kHz and 48 kHz, but then decide to sell a crippled
version that only records at 48 kHz.

My Panasonic SV-3500 is like this (I assume because of the RIAA
debate).  It can play tapes at all 3 rates.  It can record from the
analog inputs at 44.1 kHz and 48 kHz.  But, according to the manual, it
can only record at 32 kHz and 48 kHz (not 44.1) from the digital
input.  However, if you remove the cover from the version I have, you
find an undocumented slide switch.  This switch, I was told, allows you
to record at 44.1 kHz from the digital input.  I don't own a CD player
with digital outputs yet, so I haven't been able to test this. I have,
however, changed the position of the switch.

Curt Welch
curt@dtix.dt.navy.mil