<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Rich, you mentioned if everyone followed the rules then you wouldn’t need the tone. Well, as soon as elevated level came round, the rules became very difficult to enforce. Everyone asked “if we elevate the fluxivity, shouldn’t we elevate the Dolby level, too?” Plus, the meters on the 361 were easily out. If you owned a calibrator you soon learned that you could either “trust” The meter or the internal cal voltage but rarely both. I used to put tape marks on the meter to indicate the correct deflection. <div><br></div><div>Bob<br><br><div dir="ltr">My iPhone made me write this. Quotes only below this line. Nothing more to see here. <div>----------------------------------------------------</div></div><div dir="ltr"><br><blockquote type="cite">On Jan 25, 2023, at 3:45 PM, Richard L. Hess via ProAudio <proaudio@bach.pgm.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>It was...I saw a third 363 on Reverb and bought it so I now have
three pairs of CAT 300 SR/A cards, but didn't need them, but I
wasn't certain all four of mine work 100%. I do have a fourth 363
with SR-only cards. The Dolby A decoders seemed to be OK from
quick testing (I don't have a working version of the tester, and
besides, that's for CAT22s). I no longer trust the Cat 22s and 361
frames as the 363s seem to sound a bit better, but the big
improvement is on the SR side between the Cat 280 and the Cat
300...and I hear (but haven't evaluated) that the SR only cards
sound better than the SR/A cards.<br>
</p>
<p>Anyway, the 185 nWb/m cal tape was most useful and I confirmed
the level against a modern MRL 250 nWb tape.</p>
<p>If everyone completely and diligently follows the rules, the cal
tones are unnecessary. <br>
</p>
<p>Speaking of this, the world needs software decoders for Dolby A,
S, and SR. It seems as if we have workable decoders for Dolby B
and C, dbx I and II, and Telcom C4. I have not tested, but the
same folks who brought us the Telcom C4 decoder are working on
Telefunken High-Com, Nakamichi High-Com II, and CBS CX (both
versions). These three are subsets of the Telcom C4 pro system.<br>
</p>
<p>Cheers,</p>
<p>Richard<br>
</p>
<div class="moz-cite-prefix">On 2023-01-25 12:54 p.m., Scott Dorsey
wrote:<br>
</div>
<blockquote type="cite" cite="mid:63d16cbd.RKR1wdb4oLvntr%2FT%25kludge@panix.com">
<pre class="moz-quote-pre" wrap="">Dolby A with no tones? That's kind of terrifying...
--scott
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Richard L. Hess email: <a class="moz-txt-link-abbreviated" href="mailto:richard@richardhess.com">richard@richardhess.com</a>
Aurora, Ontario, Canada <a class="moz-txt-link-freetext" href="http://www.richardhess.com/">http://www.richardhess.com/</a>
<a class="moz-txt-link-freetext" href="http://www.richardhess.com/tape/contact.htm">http://www.richardhess.com/tape/contact.htm</a>
Quality tape transfers -- even from hard-to-play tapes.</pre>
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