DAT-Heads Digest #426

Contents:

Info please (Jonathan Evraire) AIWA batteries (matgbb@lure.latrobe.edu.au) DMB dat clones of 8.29.95 and 7.31.95 for trade (Abbott Wang) Casio DA-7 & SCMS defeat (Greg Brown (G P Brown)) Start_IDs on SPDIF (Greg Hanssen) hi (claus@stat.bio.aau.dk) Re: Start-ID on SPDIF (how ?) ("Norbert G. Hanke") REM Woodlands Sept 15th (Victor Yiu) Panasonic 3700 (Mark D Henderson) Aiwa batteries. (jms@uic.edu) Terrapin Sony DDS sale (Jeff Lester) Binaural mics (WOW!) (Barry Klein)
From: Jonathan Evraire <evrj01@vli.ca> Subject: Info please Date: Mon, 11 Sep 1995 20:01:06 -0400 I'm interested in the Tascam DA-20 but have no technical specs on it. Could anybody out there send me them, the pro's and con's, a place where I could get more info, etc. Also, I'm interested in any other DAT products in the same price range (around 1000$). I'd also appreciate any personal experience with this product, or other recommended products. I'm not subscribed to this mailing list so please send your replies to my personal e-mail account. Thank you, Jonathan Evraire evrj01@vli.ca Jonathan Evraire evrj01@vli.ca
From: matgbb@lure.latrobe.edu.au Subject: AIWA batteries Date: Tue, 12 Sep 1995 12:27:18 +1000 I thought someone would have pointed out by now that the battery in an AIWA HD-S1 is NOT a Ni-Cd. The serial number is PB-20: Pb as in lead. They are sealed lead-acid, as is clearly stated in the manual. Now while Ni-Cd's have charge depression effects which can give the impression of the infamous "memory effect", I've never heard of such things with lead-acid batteries. Their problem is that if they are left completely flat they can be difficult (sometimes impossible) to re-charge. This could be the problem experienced by the original poster: if the batteries were flat for some time, a normal charge period would have been insufficient to properly recharge them. Presumably they can also be fried by extreme over-charging. One of the Gel-cell experts may be able to help more. Graham Byrnes, matgbb@lure.latrobe.edu.au Dept of Mathematics, tel: +613 9479 2580 La Trobe University, fax: +613 9479 3650 Bundoora (Melbourne) VIC 3083 Australia
From: Abbott Wang <wang57@wharton.upenn.edu> Subject: DMB dat clones of 8.29.95 and 7.31.95 for trade Date: Tue, 12 Sep 1995 01:34:04 -0400 (EDT) hello all, i ahve dave matthews band clones of the mann show in philly on the 29th of aug and the 31st of july in texas.. both great sounding.. 7.31.95 taped with akg460's fob 8.29.95 taped with akg414's fob - 5th row dat trades only..e-mail me your list laters ABb -- Abbott Wang Send e-mail to rubinacc@sas.upenn.edu University of Pennsylvania with a subject of GET LIST wang57@futures.wharton.upenn.edu (215)417-8776 CHECK OUT MY WWW PAGE @ http://futures.wharton.upenn.edu/~wang57
From: Greg Brown (G P Brown) <BROWNGP@alpha.unisa.ac.za> Subject: Casio DA-7 & SCMS defeat Date: Tue, 12 Sep 1995 08:48:38 +0200 Someone mentioned to me in passing that he had read in SOUND ON SOUND (a UK magazine) that it was possible to defeat SCMS on the CASIO DA-7 by simply removing a jumper. I have scrutuinzed my collection of SOUND on SOUND mags but have found no mention of it. Perhaps the article appeared in another magazine?? I own a Casio DA-7 (portable DAT) and would be very happy to annihilate the SCMS. Any help or suggestions will be appreciated. Thanks! Regards, Greg
From: Greg Hanssen <hanssen@netcom.com> Subject: Start_IDs on SPDIF Date: Tue, 12 Sep 1995 01:12:13 -0700 (PDT) Hello.. Giorgio Fontana asked about Start_IDs on SPDIF.. well, I haven't posted in a while so I thought I'd elaborate. With every sample that gets passed serially along the SPDIF (fiber optic or coaxial) cable, there is a 'User' bit and a 'Channel status' bit.. and a few others we won't get into... The channel status bits are collected into a block of 192 bits of which only 5 or 6 are used by most DAT decks (SCMS, Emphasis, sample rate, category code, generation)... The category code tells where the signal originated, and also how the User bit is to be interpreted.. If the category code is 'Optical media' (CD) then the user bits are collected into a block of bits representing the CD's P, Q, R, S, T, U, V and W subcode... Of these, the Q subcode has oodles of info on the track number, elapsed track time, elapsed disk time, Emphasis encoding and yes, copy protection (I have ONE CD that is SCMS free!) .. although I guess it wasn't called SCMS back then... but I digress.. These blocks are updated with every CD sector (1/75th of a second... also the size of a sector on a CD rom.. 6*98*4 bytes = 2048 data bytes + 304 second level error correction bytes). Ok, Start_IDs... if the category code is 'DAT' then the User bits are much more bland.. They are basically 0 99% of the time. There is a single 1 click for every rotation of the DAT-HEAD (2000 rpm). Now, if there happens to be a Start_ID (which lasts about 9 seconds or 300 head rotations) then the bit just following the first 1 bit is also a 1... if there is currently a 'Skip_ID' then the second bit is on... thus: 000000000010000000000000 (2000 times a minute) for no Start_IDs 000000000011000000000000 (300 times a 2000/min) for a Start_ID 000000000010100000000000 for a Skip_ID... Of course if you set the category code to 'DAT' and proceed to send a CD subcode (which is bustling with P and Q subcode at the least)..... then you get (most likely) a new Start_ID every 9 seconds! Sound like a SCMS stripper you know? Some of the cooler DAT decks (like the Fostex D5) are smart enough to read CD user bits and DAT user bits so they can "read Start_IDs from CD" which is an odd concept since Start_IDs don't exist on CDs, but if you understand the subcode, you can figure out where they should be (+0 to +9 seconds on each track). The ZA1 and ZA2 interface cards come with software to interpret the CD subcode and synthesize real Start_IDs on the output so you can copy your Abbey Road CD and get all the Start_IDs... that is if you don't already have a Fostex D5... Anyway, hope that answers your question Giorgio.. Oh, hey.. I was in the record store today and heard the live Phish rendition of the White Album!! I guess somebody made a bootleg-import CD of the show.. Anyone out there have this on DAT that I could score a copy from? I don't have much to trade, but I could supply blanks.. or fiber optic cable.. they wanted $40 for the disk! I don't support bootlegs, but I will support DAT-Heads! -- --Greg <Hanssen@netcom.com> (714)-551-5833 4961 Barkwood Zefiro Acoustics: SPDIF interface cards for the PC. Irvine, Ca. 92714
From: claus@stat.bio.aau.dk Subject: hi Date: Tue, 12 Sep 1995 11:53:13 METDST Hi Regarding my note on the fm master of the danish 14 April 1972 show in Tivoli I have been flooded with tape request. I think this makes a tree necessary. But first please have patience. I need to know that the tape is still in excellent condition after all these years, the show has to be complete and in stereo. I do have the show from another source on cassette in 3rd gen and will make a comparison against this. I am afraid you all have to wait a couple of weeks before I can tell you further about the tape. This tape was recorded from the radio, the radioprogramme said it was a 160 min show, if anyone knows of longer tapes let me know. (sb ?) As you can read from my web page http://www.mi.aau.dk/~claus the danish radiohouse covered the three (not 4 as dead base book claims - would someone tell them ?) dead shows in 1972 pretty well. According to the newspapers Grateful Dead played in Copenhagen and Aarhus. The Copenhagen shows where in Tivolis Koncertsal, Copenhagen, Denmark and where held 14 (Friday) and 17 (Monday) of April 1972. In between on the 16th of April they played in Stakladen, Aarhus, Denmark. The show in Tivoli the 14th was broadcasted on the radio May 20th, 1972, in stereo (I think), the program was called "Grateful Dead i Tivolis koncertsal" The rumours back then told that the radiohouse had to broadcast the entire show, otherwise the Dead would not give their permission for the recording. So the radio send 160 minutes of Dead music. The show in Tivoli the 17th was broadcasted in television, in full colour, they split the show up in three parts, 22 minutes live transmission on April 17th (Playin' In The Band / Sugaree / One More Saturday Night) Programmed as "The Grateful Dead - Live". 2 more colour broadcasts where made on August 12, this time 45 min and called "Giv tid, venner giv tid !" (means "Give time, give time friends") (setlist unknown) and again August 25, this time 35 min and called "Koncerten fortsaetter..." (means "The concert continues") (setlist unknown). I believe someone has taped the shows from the soundboard also (the Aarhus show was recorded via sb), but what I will offer if the tape is still in ex condition is the radio transmission from April 14th 1972. claus
From: "Norbert G. Hanke" <nh@lem.ee.ethz.ch> Subject: Re: Start-ID on SPDIF (how ?) Date: Tue, 12 Sep 1995 11:11:55 +0100 >From: giorgio fontana <fontana@alpha.science.unitn.it> >Subject: Start-ID on SPDIF (how ?) >Date: Mon, 11 Sep 1995 22:26:16 +0200 > >Does anybody know how start-ID are sent on a SPDIF link ? >Thanks. Start-IDs on SPDIF are not standardized, but they are used on Sony DATs, probably also on others. Just from memory: Assuming the User-Data stream (U-Bit) to be organized as 24 Bytes, the same way the Channel-Status data is, byte 15 or byte 16 (I don't remember exactly) of it is used to signal a Start ID. Normally the byte is all-zeroes, and with a active start mark on tape it will get non-zero, but again I don't remember exactly wether it's only one bit or the whole byte, and if its in the U-Bit of both channels or only one of them. Norbert Hanke Power Electronics Lab, ETH Zurich, Switzerland
From: Victor Yiu <victor.yiu@psl-online.com> Subject: REM Woodlands Sept 15th Date: Mon, 11 Sep 95 21:02:00 -0600 * I have a front-row REM/Woodlands ticket Friday Sept. 15th. ROW A, RIGHT SEC, SEAT 8. Anyone willing to trade with me (1) ONE ticket for something in the first few rows, but not front row or an aisle seat, please contact me *ASAP* with phone number! I need to move OUT of the front row. Thanks. * Another thing: my ticket says "NO RECORDERS" in bold print. The other concerts I've been to don't allow taping either, but I'm just wondering if they're gonna be beefing up searches/security... Anybody with experience at REM shows or the Woodlands Pavillian (near Houston), let me know ASAP. --- victor.yiu@psl-online.com >> music freak ((( IN STEREO WHERE AVAILABLE ))) [+Live+ | Toad the Wet Sprocket | REM | Anything Box | Red Flag | Channel 69] ... Only XT users know that January 1, 1980 was a Tuesday.
From: Mark D Henderson <hende018@gold.tc.umn.edu> Subject: Panasonic 3700 Date: Tue, 12 Sep 1995 08:05:30 -0500 Is $1300 a good price for a new a Panasonic 3700? Anyone know if the new Tascam DA-20 will support digital I/O for any of the Digidesign cards? **************************************************************************** Mark D. Henderson //..."it don't mean a thing hende018@gold.tc.umn.edu // if it ain't got that swing" Pilhofer & Co. -Duke Ellington ****************************************************************************
From: jms@uic.edu Subject: Aiwa batteries. Date: Tue, 12 Sep 1995 11:43:23 CDT > Zac writes: >> Apparently these batteries have a "memory" and if you charge them >>before they are completely discharged - they "remember" the shorter >>discharge time and that becomes the new "Life" of the battery. Those Aiwa batteries are terrible. I had the same problem. I wound up making a dummy battery out of a wood block and using an external gel cell.
From: Jeff Lester <lester@gandalf.sp.trw.com> Subject: Terrapin Sony DDS sale Date: Tue, 12 Sep 95 13:44:51 PDT Ken Hays at Terrapin Tapes (800-677-8650) is having a special on new Sony 90m DDS tapes, $6.25 apiece. Just a satisfied customer, -Jeff Lester
From: Barry Klein <barry.klein@solar.org> Subject: Binaural mics (WOW!) Date: Tue, 12 Sep 1995 02:36:00 GMT I tried out the homebrew electret ear mics yesterday and they are AMAZING! Build or buy a set of these! Great 3D reality and good freq. response. I played around with my wife's battery powered hand mixer, swirling it around my head, over my head, etc. and it sounds just like reality on the recording. What I want to try is putting one in my right ear, one in my wife's left ear, stand apart and have the kids run figure 8's around us! I am using the 54B4 model electrets (just because they are what I had around - got them at a swap meet for 75 cents each). I am using a 9V alkaline supply with 2.2K bias resistors. Would like advice on optimization of S/N of this setup for my D3 inputs. I am told that Mercury batteries have much lower noise in this type of application. What would the voltage/bias resistors have to be for best S/N AND dynamic range? klein_b@a1.wdc.com ... Elect. Music, Photography, Bubble Machines, Stunt Kites, Elect. Design ___ Blue Wave/QWK v2.20 [NR]
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