Re: MD: MD data conversion
PrinceGaz wrote: Hey, the ZX Spectrum (the finest 8-bit machine made) stored data using monaural audio. It averaged about 1500bps, not exactly super fast, but faster than the ZX81 which was only about 300bps. *cough* Excuse me! Best 8 bit machine? No way! Not as far as Data storage was concerned, it was a real slug in that area. BBC Micro and Acorn Electron 2400bps BBC Master series 2400bps or 4800bps with stereo adapter I guess given MD audio is rather better than telephone quality, it should be able to store data with all the phase-shift stuff used by a 56K modem. Of course perhaps these v90 modems use signals the ATRAC algorithm would trash? Yes they do, but that doesn't mean achieving a higher data rate isn;t possible using combinations of tones an ATRAC algorithm wouldn't trash. If you calibratedthe volume, you could probably come up with a system that not only combined tones but also changes in volume to represent data bits. Phase shifting techniques are also not removed by ATRAC. There would be some quite sophisticated electronics to encode and decode the signal, but if you use a 22kHz tone and only represent 1 bit through phase shifting, that's still 22'000bps. If you applied some of the techniques modems use to this, I don't see why you should be able to achieve at 4 times that. Of course, when it comes to selecting individual files and obtaining directory listing of what is on the disk, then you might run into problems. -- Magic Location : Portsmouth, England, UK Homepage : http://www.mattnet.freeserve.co.uk EMail : mailto:[EMAIL PROTECTED] - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion Zip Drive Click of Death?
OT i know, but.. :) I've had a parallel port zip drive for just over a year now - it's used a couple of times a week at uni, transported about a fair bit (in a proper case, but that's not a lot of protection), and the disks are often carried about uncased. I've not had a single problem, except that the thing is so damn slow and uses up all the CPU while it transfers :) I stopped using it for backups when I bought a CDR drive. (buy an external SCSI or internal IDE zip drive rather than the PP one) A couple of friends have external PP drives too, all without problems. It seems to be something that affected the really early drives. Simon On Sun, 26 Sep 1999, J. Coon wrote: Magic wrote: no. I currently use a parallel port 100Mb ZIP drive which has a data throughput of 380kbytes/sec sustained. As it costs only £70 and offers much better facilities being a dedicated drive, I Has anyone experianced the "Click of death" Syndrom on ZIP drives? I have one but haven't used it very much. I friend ran into this "Click of Death" and lost a couple of his archives. Bummer. -- Jim Coon Not just another pretty mandolin picker mailto:[EMAIL PROTECTED] If Gibson made cars, would they sound so sweet? My first web page http://www.tir.com/~liteways/ - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED] - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion Zip Drive Click of Death?
I'm on my 3rd zip drive (not problems with the drive) sold the first one to a friend (SCSI ZIP 100) Still using the second and third one one is a 100 the other is a new 250 never had a problem with any of them.. the one I sold my buddy is still using... The reports I read about the click of death, say that it was fixed within the first year of the drives production... Yep, It's only in certain drives, and if you buy an Iomage zip-drive, then they'll suply a new disk and/or drive whenever you encounter CoD, even if you're 5 years out of warenty, doesn't matter. I've got a 100Mb SCSI Zip, and 12 disks, haven't had a single problem with any of 'm. Bye, Remko van der Vossen, [EMAIL PROTECTED] The Black Angel, [EMAIL PROTECTED] ICQ: 48056779 EDA and owner of [EMAIL PROTECTED] fan of Jewel, The X-Files, Chris Carter, Mac Gyver, BtVS, Jane Jensen's Gabriel Knight Pretty; "There is a pretty girl on the Face of this magazine And all I can see are my dirty hands turning the page" Jewel - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion Zip Drive Click of Death?
[EMAIL PROTECTED] wrote: -BEGIN PGP MESSAGE- Version: PGP Personal Edition 5.0 MessageID: CaaHP/mHZnthdcqCtBY67uKlwAcg52lX owGlVGtsFUUU9gpI3JBC0hCtEDxUDSD3RUFKm9oildgLFioXAzUozO7OvTt2d+Yy M9tlDb4wMWL5Yw0pGDG12vjDRzQ+EjGmmpomkBj8UZVEYojEJ5EYGiL4o/HMbqvx t5vNZnfmnO985/vO7OHM4jnzrmu+9P5LRy/sLzftoKOZzDO986dvb+k4ef6Lhu2L lk1cqZboD23P9b2wWH49NHDtTENn9dc5Hx9ZOPnp9NTF1X/82Hvo4pKpkYZvLh3q H/t2gbpz6wPTp1S17ur808GF3+ofeXf4/uGhG+q6H9/x6uTp3tsGb3LODGbWXcg8 uOrncjbcvXNwz9Inu6w3xvvWHb82XjyZ3fdV4cT4X2O3bNvbs6teXHn4va6ec5uG rV+O5sbODxTPfvDi55/M3X287dnXN28eO/J9XVtz6fII9I6MThz+qPb7W4XnF5Yv /blmYuJq+7alQ599+MqpJevP0mMnDn5Xv/fLG2/VpYOrJ/bcfccAu3zKc0Yns+fK b+7b2r7s5V2uuHnRO5kF1y9vzw+KnzJvz52y5yntMv6U9fQGq7QiAMEhiGGtdOEx VgNXsn4KK7nQUJPC9mmgIGLaA+3RdHOVpYTvJt8VJpVGAApaAIGKZJS7sLLcWS7B Q6UeWFMsrrLKmvk+hIrxapKkqCMwinCDwbAs5lsGgynEwJQkSuBDpkucRtB0V9Gy OO3HNY9g8iy5lBvhMYiKyQvyeStJR7wSJESxOTt03diAqX+55DHS2omhktaE1ArD JTXQtgh1QsHxmdNncF1KtJcFRWJcJxqYhogo7P4AdS1DgPEkIZUjpkTOsEkFU4as GzqaCZ5UzW2hlYqkMb7lwCoBCcDojQIiXyqXW9Z2DuWQZ6FpPZRpDda0tLRkYUse OgW6FUmhaatltQPe3aTKnNmldkjW2hEuj/04oZSUaz/GjqnRjEji+9QH07BRuttO bEo9jzzmeKiukdwlmiRA2pMirHo1lARbWruh2GfHmqoCmggqVJowTt083KOMKI5Q qKPgWPC15mLisKhUqFQQhI6X4NlUa/SwQhzmM81QG5uawcCS1GUO0dRN6WShhAld hg2PjZv0QI1KRrhD09lr7PyPPY1QjrkrRTLP/zSlOiDB8Uh/OhM2NmI++AptRHEN bRyqOGGYx+DZIZaEA+M41uiumimGQFju3rSc6c7HhpG6I8KaT82eiSXS8UzpPGwK g4BKRLUSW3I5fGxhQeIivm5Dzx8NDQJPp70mUR2kgtDCx5mqYU0qMTIgzNeiFRWj EYnVRs1k3hEB7pQqcB+zlTnDxMWRJVJlIRJhekBjPAEh8lQCVESp7rASInh3xzPT GlEb56JK02VP61proRBFUX6mRuGJ2aoFy7TwPy/E2IlktKhBFZtN/wkoms+QizLC EwioUsgIZeVmvkxMIpNxPRLSRYzGkKvQVo5kNm00P5/Azfk5SfeHVOmNJAh9kpy2 VCTrbw== =zkLX -END PGP MESSAGE- Hmm, I gues somebody who stored his mail on minidisc and send it to MD-L? Cheers lpRah - errro radeing divre :C -- === Ralph SmeetsFunctional Verification Centre Of Competence - CMG Voice: (+33) (0)4 76 58 44 46 STMicroelectronics Fax:(+33) (0)4 76 58 40 11 5, chem de la Dhuy Mobile: (+33) (0)6 82 66 62 70 38240 MEYLAN E-Mail: [EMAIL PROTECTED] FRANCE === "For many years, mankind lived just like the animals. And then some- thing happened that unleashed the powers of our imagination: We learned to talk." -- Stephen Hawking, later used by Pink Floyd -- === - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion Zip Drive Click of Death?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 * Ralph Smeets [EMAIL PROTECTED] on Mon, 27 Sep 1999 | I gues somebody who stored his mail on minidisc and send it to MD-L? Nah. Just the stupidity of a Reply-To header pointing at a mailing list making it difficult to send a reply to the originator of a message. It just so happens that this one was encrypted. -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.0 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE373ZBgl+vIlSVSNkRAkJQAKC85vChZEQD3SH3oX7kxDJ0Omt6rgCaA1hM llPpBcuSVjjLcSbkSxxR/0A= =CoxW -END PGP SIGNATURE- -- Rat [EMAIL PROTECTED]\ Do not taunt Happy Fun Ball. Minion of Nathan - Nathan says Hi! \ PGP Key: at a key server near you! \ - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 * Ralph Smeets [EMAIL PROTECTED] on Mon, 27 Sep 1999 | 2) I think it would be possible to store data on a audio disc using the |analog interface.. Use two frequencies, one for '0' and one for '1'. You do not remember the days when personal computers used monaural audio cassette recorders for data storage, do you. :) Then again, a modem -- MOdulator-DEModulator works the same way, using analog tones to represent the bit stream. -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.0 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE373dkgl+vIlSVSNkRApzYAJ42OGdEBPROksNsuahsuuv0CSnljwCgs1qw hb9QyhbsPuvGImYN9OeABIQ= =J9Bx -END PGP SIGNATURE- -- Rat [EMAIL PROTECTED]\ Do not taunt Happy Fun Ball. Minion of Nathan - Nathan says Hi! \ PGP Key: at a key server near you! \ - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion
[EMAIL PROTECTED] wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 * Ralph Smeets [EMAIL PROTECTED] on Mon, 27 Sep 1999 | 2) I think it would be possible to store data on a audio disc using the |analog interface.. Use two frequencies, one for '0' and one for '1'. You do not remember the days when personal computers used monaural audio cassette recorders for data storage, do you. :) Then again, a modem -- MOdulator-DEModulator works the same way, using analog tones to represent the bit stream. Well, I know that my data-recorder for my MSX computer used 1200 Hz for '0' and 2400 Hz for '1'. All those 'turbo' charging programs would somehow double, triple, quadrople etc. the frequency in order to gain a higher speed. Cheers, Ralph - Pip, crhhh, piep piep piep pip pip pip piep piep pip pip piep chhhr... (*)(_)(@#$*( tape broken. -- === Ralph SmeetsFunctional Verification Centre Of Competence - CMG Voice: (+33) (0)4 76 58 44 46 STMicroelectronics Fax:(+33) (0)4 76 58 40 11 5, chem de la Dhuy Mobile: (+33) (0)6 82 66 62 70 38240 MEYLAN E-Mail: [EMAIL PROTECTED] FRANCE === "For many years, mankind lived just like the animals. And then some- thing happened that unleashed the powers of our imagination: We learned to talk." -- Stephen Hawking, later used by Pink Floyd -- === - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion
On Mon, 27 Sep 1999, Ralph Smeets wrote: You do not remember the days when personal computers used monaural audio cassette recorders for data storage, do you. :) Then again, a modem -- MOdulator-DEModulator works the same way, using analog tones to represent the bit stream. Well, I know that my data-recorder for my MSX computer used 1200 Hz for '0' and 2400 Hz for '1'. All those 'turbo' charging programs would somehow double, triple, quadrople etc. the frequency in order to gain a higher speed. Cheers, Ralph - Pip, crhhh, piep piep piep pip pip pip piep piep pip pip piep chhhr... (*)(_)(@#$*( tape broken. yeah, i remember my TI99 and playing montezuma's revenge on it...ahh, the memories. fire up the 99, hit play on the tape drive to load the game, go watch a half-hour sitcom, come back, wait for the game to finish loading for a minute or two, then play. fun. ;) * a disturbance in a system. laerm. @voicenet.com ##:# calm down my heart/don't beat so fast/don't be afraid icq:5562209just once in a lifetime - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion
Hey, the ZX Spectrum (the finest 8-bit machine made) stored data using monaural audio. It averaged about 1500bps, not exactly super fast, but faster than the ZX81 which was only about 300bps. I guess given MD audio is rather better than telephone quality, it should be able to store data with all the phase-shift stuff used by a 56K modem. Of course perhaps these v90 modems use signals the ATRAC algorithm would trash? Cheers, PrinceGaz -- "if it harms none, do what you will" Email: [EMAIL PROTECTED] Website: http://website.lineone.net/~princegaz/ ICQ: 36892193 - Original Message - From: Stainless Steel Rat [EMAIL PROTECTED] To: MD-L [EMAIL PROTECTED] Sent: 27 September 1999 14:55 Subject: Re: MD: MD data conversion -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 * Ralph Smeets [EMAIL PROTECTED] on Mon, 27 Sep 1999 | 2) I think it would be possible to store data on a audio disc using the |analog interface.. Use two frequencies, one for '0' and one for '1'. You do not remember the days when personal computers used monaural audio cassette recorders for data storage, do you. :) Then again, a modem -- MOdulator-DEModulator works the same way, using analog tones to represent the bit stream. -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.0 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE373dkgl+vIlSVSNkRApzYAJ42OGdEBPROksNsuahsuuv0CSnljwCgs1qw hb9QyhbsPuvGImYN9OeABIQ= =J9Bx -END PGP SIGNATURE- -- Rat [EMAIL PROTECTED]\ Do not taunt Happy Fun Ball. Minion of Nathan - Nathan says Hi! \ PGP Key: at a key server near you! \ - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED] - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: MD data conversion
currently i am involved in a research project in my computer engineering studies to allow a home audio md unit (je510 initially... same process for others) to store data and audio on the same disc.. if this conversion was patented and fairly cheap, do you all feel there is a market for this? it would use the audio discs and pass data through the serial port at 150Kbps. single speed cd... there is also the possibility of speeding up the drive itself... like with using the new quad speed ones sound good? I don't think it would, there are already 250 MB ZIP disks, which are fearly cheap, and fast, and they're bigger in MB's than MD's too. I myself have a 100 MB ZIP Drive, and it works great, a lot of my friends have one too, and at school they've also got them. and it work's really fast 600 Kbyte to 1 Mbyte per second. the 250 is even faster. BTW, the serial port of a computer has a maximum speed of 115 Kbit per second, which comes to 11.5 Kbyte per second, so that won't really work, you'd have to create a ISA or PCI card for it to work at higher speeds. Bye, Remko van der Vossen, [EMAIL PROTECTED] The Black Angel, [EMAIL PROTECTED] ICQ: 48056779 EDA and owner of [EMAIL PROTECTED] fan of Jewel, The X-Files, Chris Carter, Mac Gyver, BtVS, Jane Jensen's Gabriel Knight Pretty; "There is a pretty girl on the Face of this magazine And all I can see are my dirty hands turning the page" Jewel - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
