Date: Thu, 25 Dec 1997 19:55:12 +1030 From: Greg Lehey <grog@lemis.com> To: Martin Heller <mheller@student.uni-kl.de> Cc: hackers@FreeBSD.ORG Subject: Re: Moving CD audio data around with HP 4020i Message-ID: <19971225195512.18219@lemis.com> In-Reply-To: <Pine.A41.3.95.971224233128.45982A-100000@mater.student.uni-kl.de>; from Martin Heller on Wed, Dec 24, 1997 at 11:42:18PM %2B0100 References: <19971224132149.33375@lemis.com> <Pine.A41.3.95.971224233128.45982A-100000@mater.student.uni-kl.de>
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On Wed, Dec 24, 1997 at 11:42:18PM +0100, Martin Heller wrote: > On Wed, 24 Dec 1997, Greg Lehey wrote: >> On Tue, Dec 23, 1997 at 08:05:53PM -0600, Daniel M. Eischen wrote: >>>> Heh, I'll bet you $10 right now that I can send you an Audio CD >>>> (transcribed from DAT) which you will *not* be able to duplicate >>>> with your Solaris box. :-) >>> >>> Wait, I've got a buddy that's been trying to figure out how to read >>> an audio DAT tape and write it to a CD audio track. Is there a >>> known solution??? >> >> With enough effort, there's always a solution. > > Getting Audio data from a DAT is not trivial. > To do this you need a special ROM on your > DAT drive, SGI DATs are the only ones to have such a beast AFAIK. > There is no known way around this problem - ever put a audio DAT > tape into a DAT streamer ? Yup, and I've written data to them, too. > my DAT doesnt like them and throws them out. More modern DDS drives have a thing called MRS (Media Recognition System), which causes them to reject cartridges which are incorrectly coded, including a number of older data grade cartridges. You can disable this feature on most drives. I don't know whether this is sufficient to read DATs, however. >>> I know he'd be *very* interested if there was, as he's been trying >>> to figure it out for a few months (on and off). >> >> There's a lot more involved than just copying. IIRC, CDs record at >> 41.4 ksamples/second, and DATs record at 44 or 48 ksamples/second, so >> you'd effectively have to remaster. I suppose straight interpolation >> would work, but it's still a lot of processing. > > I do not think that its so esay, but there are programs for professionals > who can do this. Any comments on the difficulty, or the appropriateness of linear interpolation? Of course, you'd need to know the block format. Merry Christmas Greghome | help
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