Date: Tue, 23 Dec 1997 09:16:41 -0800 From: Amancio Hasty <hasty@rah.star-gate.com> To: Stephen Roome <steve@visint.co.uk> Cc: Luigi Rizzo <luigi@labinfo.iet.unipi.it>, multimedia@freebsd.org Subject: Re: precise soundcard tuning ? Message-ID: <199712231716.JAA01380@rah.star-gate.com> In-Reply-To: Your message of "Tue, 23 Dec 1997 11:59:32 GMT." <Pine.BSF.3.96.971223114156.9149F-100000@dylan.visint.co.uk>
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I apologies to SB owners and to myself for I am SB16 PnP owner . Now, SB cards are notorious for their clock innacuracy and 5% is not really unheard of . Jim Lowe once reported a SB card which was 10% off . The GUS PnP comes with two crystals: 24.576-MHz and a 16.9344 MHz. Amancio > On Mon, 22 Dec 1997, Amancio Hasty wrote: > > After about 7 minutes or so: > > 3112000 388.919 8001.66 > <snipped results> > > Okay, I've not had a chance to test this one yet, but I don't think that's > the problem I was initially experiencing. > > I was playing a 440 Hz wave and it was coming back somewhere between a G > (391Hz) and a G# (416Hz). It's nearer G# to be fair, but that's still at > least 5.45% out. > > Even combining any inaccuracies in my RTC, with the sound card 5% is quite > a big swing. > > So, I'm still going with your original (if defamatory) statement about > sound blaster cards, my Creative Labs cdrom drive isn't any better either. > > Steve. > > Steve Roome - Vision Interactive Ltd. > Tel:+44(0)117 9730597 Home:+44(0)976 241342 > WWW: http://dylan.visint.co.uk/ >
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