New Philips eXpanium Will Use 3" CDs 318
SpunOne writes: "Phillips is gearing up to release their new eXpanium mp3 player. Unlike most players in the past that use proprietary storage technology, Phillips is turning to the use of those cute little 3 inch CDs that have been around forever, but never really used for much. Apparently most existing CD burners can already write to them, and the rest can do so with an adapter. Phillips even has a beta test available if you're interested in giving it a try." If you should get into the beta group (50 people), why not write up a report for us on this little device? If it only played .ogg files, I would try to pre-order from somewhere.
Old Expanium (Score:1)
3" (Score:1)
What's the problem with DATA MD's? (Score:1)
Size Matters! (Score:1)
I like my MP3-CD player because of how much music I can fit onto a disk, and because it's easy to switch what I'm listening to without having to have a computer around to re-download music to a memory-based MP3 player.
But try bringing one of those to the gym. most of the aerobic machines have drink-holders in them, but a full-sized CD player won't easily fit in them. This might be a good compromise when you want the benefits of CD storage (165 MB is still more than 32 or 64!) but a much smaller size (not only for the gym, but for carrying in pockets, etc.
To me, it looks like the best of both worlds.
So, what's the difference? (Score:1)
http://www.freecom.com [freecom.com]
And what's wrong with minidisc media?? (Score:1)
Plus, minidiscs have a hard plastic case with locking shutter door so they won't get scratched.
Does the world _really_ need these... (Score:1)
29 Percent of a full CD... (Score:4, Insightful)
3 inch CDs = 185 Megabytes.
Bad Math (Score:3, Funny)
Why?
Obviously, it's because this media is going to be deluged with copyright efforts that make the uncrackable SDMI codec seem to be the equivalent of the 31337 "Rot-13" encryption.
We should be wary of this media, for any media that requires over 200MB of encryption shall be dangerous to our liberty!
Re:Bad Math (Score:1)
Actually, a standard CD is roughly 4 3/4 inches. Thus, the uncrackable copy prevention technology requires about an additional 20 megabytes of space. Perhaps an encoded speech from Jack Valenti?
Re:Bad Math (Score:2)
Re:Bad Math (Score:1)
Re:Bad Math (Score:2)
If I burn a folder of MP3s on a CD myself, using linux, then how could it have extra copy protection?
Also, if you take the data bits and switched them from a disk into a line of data, the larger CD will beable to hold a lot more. or have a lot larger line.. A ring of data at 6" should hold twice as much info then a ring at 3". So that's why a 6" CD holds alot more.
Re:Bad Math (Score:2)
Re:Bad Math (Score:1)
Doh...I wanted to be the only one to know.... (Score:1)
So let me get this straight... (Score:4, Insightful)
Whereas a MiniDisc is 2.5" wide, holds 256 MB, costs $2 each for a rewritable blank disk, the player is much less sesceptible to skipping, and uses ATRAC2, which at 256Kbps is generally regarded to be superior to mp3 at the same bit rate,
So why bother with this mutant mp3-cd player? It won't even play my CDs.
Skip protection (Score:1)
Re:So let me get this straight... (Score:2)
2) MD are harder to record onto
3) MD will not play in CD-MP3 players
4) MD players are more expensive
5) MD do not allow you to control audio quality -vs- bandwidth tradeoff
Re:So let me get this straight... (Score:2, Informative)
Yes, than regular CDs. However, they hold 140M vs the 160M the 3" CDs-- not much difference.
2) MD are harder to record onto
Actually, CDs are harder to record to for me. Want to know how hard it is to make an MD? Step 1: insert CD into deck; Step 2 insert CD into deck; Step 3 press CD->MD button and wait.
3) MD will not play in CD-MP3 players
Yes, and CDs won't play in MD players. So...?
4) MD players are more expensive
Which ones? I paid $150 for my RioVolt and $100 for an MD player.
) MD do not allow you to control audio quality -vs- bandwidth tradeoff
Not true any longer as has been mentioned. MDLP allows you to get either 2X or 4X the normal time.
Re:So let me get this straight... (Score:2, Insightful)
1) less information / music: I've heard up to 180MB on the little ones. Still not *that* different from a MD, but a slightly larger difference than you say
2) difficulty of recording: It sounds like it's really easy with the particular setup Rambo has. However, for people who use their PC as the everything-media station (and don't have such an MD rig
3) That MD will not play in CD-MP3 players
4) Expense: again, depends on what the baseline is. If someone has a computer made in the last 3 years, it probably has the oomph to make CD-Rs, CD-R drives start in the 50s of dollars right now
5) Bandwidth control: you can use very narrow bitdepths if you want / need to with MP3 / ogg -- I'd like to have audio books that last a long time without changing disks, don't need much fidelity for that. The choices on MD may be better than they used to be, but not nearly as rich as with the others
timothy
*In NYC, LA or Chicago, easy to find. In small-town America, even middle-sized-town America, you're probably looking at mail order. And your friend down the block won't have a player, unless you're the two guys in town with players
Re:So let me get this straight... (Score:2)
As far as the bitrate goes, 74min in 140MB does in fact work out to 256kbps.
Hmmmm......I like the idea but...... (Score:3, Insightful)
The 3 inch CD only holds about 85 megs more then a Zip disk. I can buy 50 650 Meggers for about half the price of a 3 incher, so why bother? The only thing I can think of is that they'd be nice to drop a 3 incher into a letter or card with a bunch of images on them to send it to grandparents who would like to see pics of their grandchild a bit more. While the size is nice, I don't see why they'd go that way. 2 inches is not much to save! Now if they could build a 3 inch CD player that fits into, or onto a handheld I'd be more interested, but for a portable player, maybe not. If I am selected to beta test, it will still be a neat toy to play with!
Re:Hmmmm......I like the idea but...... (Score:2)
5" CD-R's (74 min)on a 50 Pack Spindle = $18.00
Prices obtained on cdroutlet.com [cdroutlet.com]
Now which one is cheaper???? Even if the 5 inchers costed more, it would STILL be cheaper!
185 MB x 50 = 9,250 MB
650 MB x 50 = 32,500 MB
Re:Hmmmm......I like the idea but...... (Score:2)
50 PK 3 inch CD-R's = $60 (found by typing 3 in CDR in search string.....not even listed when clicking Media)
50 PK 5 inch = $8 (found by clicking media, then 50 PK CD-R)
Granted, I would NOT trust anything much under 15-18 bucks per 50 PK to burn at anything but 1-2x with any consistency, even if it was 18 bucks it would be cheaper! Per disk even!
3 in with above price = 60/50 = $1.20 per disk.
5 in with above price = 8/50 = $0.16 per disk
5 in with good quality = 18/50 = $0.36 per disk
Now, price per MB
3 in price per MB = 1.20/180 = rounds up to about a penny per MB .16/650 = Not even a penny per MB it's about .0002 per MB .36/650 = Not even a penny again.....about .0005 per MB.
5 in price per MB =
5 in quality per MB =
Now, I know that the 3 inchers are DEFINITELY cheaper then solid state memory devices such as CF, MMC, SD or Smart Media, but they ain't cheaper then 5 inchers! Now if you WANT to pay $0.50 to $1.00 per 5 inch disk, go right ahead! I won't stop you! ;) I don't buy the cheapest disks either for 5 inchers, but I don't spend $0.50 to $1.00 either, at least not at the moment! I have some ULTRA cheapies and they won't burn at 8 x at all. Throttle them down to 1-2x and they work fine. I don't loose data and those are the ones I use for little one offs. So cheap I can throw them away and it would not bother me. I just DO not find the need to spend mega bucks on a CD just to assure that it burns at a high speed or whatever. I don't have a burn proof drive anyway, so whether it takes 8 minutes or 20 to burn a disk my computer's still tied up. I also don't waste too much money on RW's yet. When they start to be as cheap as all CD-R's AND can be read in every CD player I own (I don't buy new drives or players every freakin year either...), I will STAY AWAY!
Re:Hmmmm......I like the idea but...... (Score:2)
When the Zip 250 came out, CD-R's were already cheaper then Zip Disks. In fact, have Zip's ever came down in price? Last I checked, Zips still cost about the same as they did when they came out (they are MAYBE a few dollars cheaper, but no where near where they should be!) and it's VERY hard to find any Zips other then Iomega's (unless you go to like Best Buy and scrape off the dust on some of the Fuji's on the back shelf! ;)) I mean I HAVE a Zip Drive (a 100 Megger), but after I got a CD-RW drive I saw zero point in getting a Zip 250, or more Zip Disks. Iomega could have and should have had something, but their prices are too high and the bump they made wasn't big enough. Zips COULD have replaced the floppy, but, alas, it looks like either nothing will, or CD's or DVD's will (more likely that CD's will now). Zip Drives are dead in my opinion!
Re:Hmmmm......I like the idea but...... (Score:2)
What I want to know is what happened to the real good CD players that could read scratched disks. One day when I was still in college we found a CD laying in the street and it was all scratched and everything. We took it back to the rooming house we were staying in and slipped it into the CD player and it worked great! Try that with one in Best Buy today! (well, the normal cheap ones....not the mega expensive ones)
My findings on the Freecom Beatman. (Score:3, Informative)
Whereas my Rio only held 32MB of music, the Beatman will store 185 megs. That translates to over 50 tracks in my case. And as opposed to conventional CD/MP3 players such as the original expanium, the Beatman fits snugly into my coat pocket. True, it's slightly larger than a solid state MP3 player and the battery life is a bit shorter (about half as long on twice as many batteries), but those are the only disadvantages that spring to mind. The media is nice and cheap and you can carry many of the little discs around without much hassle. Skipping isn't too much of a problem. The buffer seems to cope quite well with all but the severest of shocks. But best of all is the price. The beatman, here in NL, costs less than the cheapest MP3 player on the market.
There are several areas where philips could improve on the beatman design in their new Expanium. For one, I'd like to see a display that reproduces song titles and not only track numbers. It would also be nice to have some form of directory support. I'd like be able to easily select all songs in a single folder, for example. Finally, the beatman is still a bit on the largish side. This seems to be a result of Freecom using a standard reading mechanism as encountered in laptops and made for regular 13cm CDs instead of a custom mechanism. I think Philips could possibly shave several centimeters off the depth of the thing with a custom-built optical subsystem. The original Expanium was somewhat bulky, however. It remains to be seen how small this one will be.
I'm wondering... (Score:2, Insightful)
Re:I'm wondering... (Score:2)
I would love to have an mp3 player that could fit in my shirt or pants pocket like a walkman and it would be nice if I could easily flip a new album in like I do with tapes. Ram mp3 players are good but you have to plan ahead of time what you are going to want to listen to. 5+ inches of a media is just very bulky to carry around.
I'm looking for a 3" CDROM drive (Score:2)
I'm looking for a 3" CDROM drive that fits in a floppy drive bay. I'm still trying to shrink computers down smaller and smaller. I only need the CDROM drive in there at all to serve as a rescue disk (and a floppy won't hold enough for what I need).
Re:I'm looking for a 3" CDROM drive (Score:2)
Every Jaz disk I had eventually died. The drive is now gathering dust, no longer worth buying media for. An LS120 or ZIP is certainly a possibility. The purpose is for being able to boot a rescue disk, and those are bootable. But a CDROM would be cool and some of my machines are out of 5 inch bay space, but do have 3 inch bay space remaining. It would mean I could service all my machines with one rescue CD.
It's kinda cute looking (Score:3, Insightful)
-Henry
Re:It's kinda cute looking (Score:2)
But with a width of at least 3 inches, reduced battery life compared to most others(since CDs tend to be power suckers) and 3 inch CDs that are not exactly common in the US to buy, will it take off? -Henry
You call yourself a geek? When was the last time you were to a computer store? They are everywhere here in the cowtown that is Columbus, OH! While I agree with you it ain't common to BUY them, I see plenty of them rotting on the shelves! :)
No thanks… (Score:2)
I will be avoiding this one.
Think about the advantages an MP3 player can have over a CD player:
If you want to burn your music on to a CD, get something that takes a full-size CD. Standard CDs are higher-capacity, not much larger, cheaper, and more widely available. Plus, I believe that there are MP3 CD players that can handle standard audio CDs as well, so you have more flexibility.
If you want something small, get an MP3 player that takes a flash card. They much smaller than this thing, have more battery life, and don't skip.
irony? (Score:5, Funny)
Wow. This is, like, so new. (Score:2)
$139
It's been around for quite some time.
http://www.easybuy2000.com/store/?cat=mp3%20pla
And its 8cm, not 3 inches.
What can I say, tim-mah!
what about DVD tech? (Score:3, Insightful)
Re:what about DVD tech? (Score:4, Insightful)
Full size CD-R: 650 megs
3 inch CD-R: 180 megs
A quick ratio gives the result that a 3 inch DVD would hold about 1300 megs, twice the capacity of a full size CD..
Re:what about DVD tech? (Score:2)
Cheap DVD-R is coming (Score:2)
Ka-Ching! Count me in!
Jon Acheson
Just another opinion (Score:2)
Personally, I find them better than standard MP3 players because for half the money I get 3 times the storage, plus I can swap out disks easily. These things are actually very available. A computer show never goes by where I don't see them. And the size advantage is nice in some cases. I fly a hang glider and I want something small that I don't have to make extra room for in my harness.
Now if only it supports a flash ROM so I can write an ogg vorbis [xiph.org] decoder for it.
Most Portible CD Players these days play MP3s now (Score:4, Interesting)
Ryan
What about business cards? (Score:3, Insightful)
Business cards hold 40 min of CD quality audio (Score:3, Informative)
Business card CDs [cd-romduplication.com] can hold up to about 55 MB of data or almost 40 minutes of CD-quality audio[1] encoded with a good MP3 encoder [sulaco.org], making them very useful for distributing a demo "tape." This new player should be able to play them just fine.
[1]Yes, 192 kbps MP3 encoded with LAME is CD-quality if you consider CD-quality to mean "capable of profound fidelity over 0-20 kHz" or "transparent to the human ear vs. stereo 16 bit per channel linear PCM." See also R3mix.net [r3mix.net]'s "encoding" section.
Re:What about business cards? (Score:2)
Re:What about business cards? (Score:2)
Re:Does anyone sell those CD's on there own? (Score:2)
Theoretically I suppose you could just cut them down... but you might have a problem if the laser moves past the edge.
Ogg support (Score:4, Interesting)
I would rather use my CD player anyway. A real CD sounds better anyway. It is also a simple matter to make an expendable copy of a CD so the original isn't in danger of theft or damage.
Re:Ogg support (Score:2, Interesting)
Honestly, I don't think you want players that are updatable (the Philips site says that Rush, their solid state player, is), because you'll never know when they'll try to sneak down the latest User Hostile fuckware with an upgrade, being the slaves of the evil industry that they are (no, they probably wouldn't make a player suddenly stop reading MP3s for some encrypted format, but they could stop reading files with certain watermarks (the SDMI plan)).
Forget hardware players - they are too easy targets for control by the powers of evil. Liberation lies in software players on generic handhelds - which can play OGG files without having to go begging to some company like Windows users...
Re:Ogg support (Score:1)
Re:Ogg support (Score:1)
To upgrade Sonic Blue's Rio Volt, you have to burn a special cd with the upgrade in the root of the disc.
Re:Ogg support (Score:2)
Fair enough, but once hardware players for Vorbis appear, then there won't be any point in not using Vorbis either. Then the decision of which to use will simply be a matter of which happens to work best (i.e. fidelity per megabyte), and Vorbis has the advantage in that regard.
Re:Ogg support (Score:2)
Why? (Score:4, Informative)
To me the advantage of CD-based MP3 players has always been that they can store massive amounts of music they can store -- 700 megs (or more if you get more expensive CDs and/or overburn) on a CD that costs pennies. Being able to pop a CD containing 5 to 10 CDs' worth of music into my Rio Volt is the main reason I bought it -- no lugging around more than a couple of CDs, and I can use it in the car without endangering other people on the road by flipping through CDs when I should be driving. By cutting the storage capacity to just over a quarter of that, it's sort of eliminating the point of using CDs. Iomega had the same problems with the HipZip -- no matter how cheap the media is, nobody's willing to put up with the problems brought on by optical or magnetic media unless they get some big storage payoff. (Admittedly, at 40MB the PocketZip disks are significantly smaller, but so are the disks' physical size, and you didn't have to invest in a CD burner if you didn't already own one.)
That isn't to say I don't wish Philips well with this -- my last (pre-MP3) CD player was a Philips, and it's taken quite a beating and still works as well as the day I bought it. I'm just afraid the market for this sort of thing isn't going to be very warm.
Re:Why? (Score:2, Informative)
a) More time on one disc at the best quality
b) Better quality. _Especially_ at the same bitrates as ATRAC. www.r3mix.net has the truth.
c) Open format that plays in your neighbours' PC.
d) You can play it in a normal MP3 player as well.
e) Media is cheaper.
f) Media is more availiable (tell me, does Office Max have MiniDisc yet? They sure have 3" CDRs)
g) Media is round (ok, this one is stupid
h) MP3 offers you the trade off of more time for less quality. I don't think MiniDisc is so flexible.
i) MP3 ID3v2 tags are more versatile than what MiniDisc uses (I think)
j) *not* SDMI compliant
k) Burns 20x faster (or more) than MiniDisc
l) No generational re-encoding loss if your library is mostly in MP3 format (like a lot of people)
m) Compatibility with more of everything out there. Computers, DVD players, MPTrip clones, CellPhones, you name it.
n) MP3 is new. Minidisc is old. (this is for the people who need the newest gadget all the time)
o) Player is probably going to be cheaper than a MiniDisc player.
p) Player is not licensed by one of the biggest money grubbing record companies of all time, Sony.
q) Player is, however, developed by the company that (jointly with [ugh] Sony, I think) invented CDs.
r) Discs are readable at 27x if you want to copy then quickly.
s) All you mini MP3 discs can be backed up onto a large hard drive. From what I know, minidisc cannot be backed up to a hard drive due to SDMI restrictions. I may be wrong on this.
t) MP3 is for "computer use", so therefore in the US idiotic piracy taxes probably can't be applied (like they do to DAT -- I know that isn't MiniDisc, but you never know what might happen in the future). In Canada, though, that doesn't count as we have piracy taxes on data CDs.
There's probably more reasons I could come up with but a-t is enough for now.
Just my opinions.
No one will notice the 128kbps quality dropoff... (Score:2)
Re:Why? (Score:2, Informative)
You know MiniDisc uses a lossy compression standard developed by (I think) Sony called ATRAC, right?
Re:Why? (Score:3, Funny)
The Quality is Better than you Think (Score:2)
I felt the same way, until someone pointed me to r3mix [r3mix.net], where there are many pointers on getting the best possible quality out of lossy compression. Using LAME with the --r3mix flag set, variable bit rate min 112, I can hear no difference from the source media, and I have very good ears. Try it; you'll save a ton of space, and be happier with your sound.
Re:Why? (Score:2)
--Blair
Rip It! (Score:2, Funny)
Play your current CD collection through the PC's CD-writer using simple software to compress the music into MP3 data format and place it on your hard drive ready for compiling. (You can also download legal MP3 music files from the Internet to your hard drive).
Trust me i can also download Illegal songs to my hard drive....
Big deal - Freecom Beatman is already available (Score:3, Informative)
A great reason to Beta Test (Score:2)
Sounds like a great reason to be a beta tester to me! Not only would you get to try the thing out, you'd also be able to give them the feedback that it should play .ogg files. It's quite possible, even likely, that Phillips could add .ogg playing capability with a firmware change. If somebody told them it was a desirable feature, that would greatly increase the chances of it being included.
IOW, sign up, sign up, sign up.
[goes to sign up]
Re:A great reason to Beta Test (Score:2, Funny)
Now the beta test will be /.'ed.
There go my chances of getting a free eXpanium...
Jenova_Six
ogg (Score:2)
We just used these in a project... (Score:2)
Make your own... (Score:2, Funny)
the 3" renaissance (Score:2)
combined with this story, it definitely seems like Philips and Sony had a recent mutual epiphany about portable storage medium efficiency. whether their bets pay off or not- there seems to be a lot of pluses and minuses, it's definitely a renaissance right now for these little 3" critters!
proprietary storage technology? (Score:3, Informative)
Nearly every MP3 player I've seen use standard Compact Flash, Smart Media, or Memory Stick media -- all widely used standards used in everything from digital cameras to PDAs, and hardly proprietary!
Re:proprietary storage technology Yep (Score:3, Interesting)
The prob with compact flash and smart meida is the formats arent proprietary but the vendors write data in such a way that it is hard to interchange the cards (Sony and Kodak for one example) plus they are expensive (im outside the US)
Memory Stick is a proprietary format belonging to Sony - as yet i dont believe there has been any other vendor making either a memory stick product or a memory stick - thats as proprietary as you want.
PS Proprietary is when a tech is one companies only - the amouont of products on the market means very little if the company hasnt made it an open standard.
Re:proprietary storage technology Yep (Score:2)
Don't know much about the Memory Stick or Smart Media, but Compact Flash has a simple ATA interface. I know Kodak cameras write to it like a regular disk, and I imagine Sony does as wel, so I don't see how it can be so hard to interchange them.
Besides, I'm pretty sure that all the CF in the world gets made by SanDisk anyway, and SanDisk sells them to everybody so they can put their own branding on. But I could be wrong...
Re:proprietary storage technology Yep (Score:2)
advantages of a smaller disk (Score:5, Insightful)
The advantages of a smaller disk include a smaller player (fits in your pocket, unlike the current raft of full-size CD/MP3 players), lower power consumption (it actually does take a lot less energy to spin up a ~40% smaller diameter disk), low-cost media (3" disks usually cost about US$0.55 in lots of 50 and US$1 in lots of 10 or less), requires no new software (!!), and low production cost of the player (since none of this is new technology). Out of about a dozen cd burner I've used, every one supports 3" CDRs, as well as all tray and most slot-loading players.
This player and two disks will almost get me thru most of the workday without hearing a repeat, I can play the disk in my computer without any hardware-specific software or drivers, and the trivial cost of the media make it quite nice for sneakernet music swapping. Are you going to swap or give away your CF card or MiniDisc? I didn't think so. Who knows, maybe this will bring the cost of 3" CDRWs down.
Low tech? Yes. But a very nice application of low-tech.
Jon
Re:advantages of a smaller disk (Score:1)
All excellent points, but you forgot the most important thing:
They're really cute.
Picky, Picky ... (Score:4, Informative)
I have some (Score:4, Informative)
Re:I have some - 8cm not 3" (Score:2, Informative)
> [...] same as ten 5-1/4" CD-R's.
dude, it's 8 and 12 centimeters. The CD
was developed by Philips in the Netherlands,
therefore it's metric (like everywhere
but in the US of A)
Re:I have some (Score:2)
Ironically, they seem to be the most reliable CDRs around. The manufacturers of the crappy ones, being so focused on making crap CDRs, they aren't getting into this, apparently. OTOH, I've only burned about 30 of them, but they are 100% reliable and the CDROM drives read them at full speed (no slowdowns and timeouts like the crappy ones).
Re:I have some (Score:2)
Answer: cp is lossless; MDLP isn't (Score:1)
why Phillips thinks that people will want one of these more than a Sony MDLP player/recorder?
Copying your existing MP3 files you downloaded from mp3.com or that you ripped from your CDs a while ago to a 3-inch CD-R is a lossless process. Decoding MP3 and encoding ATRAC isn't.
Re:Answer: cp is lossless; MDLP isn't (Score:2)
- A.P.
Re:eXpanium vs. MDLP (Score:2)
Re:Those three inch CDs (Score:1)
Harman Kardon FL8370 doesn't like them (Score:1, Informative)
Re:Those three inch CDs (Score:3, Informative)
Re:Those three inch CDs (Score:2)
Subtle Benefit of 3" CDs in Portables (Score:3, Informative)
Quoted from Article:
Phillips is turning to the use of those cute little 3 inch CDs that have been around forever, but never really used for much. Apparently most existing CD burners can already write to them, and the rest can do so with an adapterThat's a great idea! I thought those things were gone forever. I loved their size and found the shape appealing, but always found their capacity to be annoying. Finally, a solution!
Quoted from reply:
They never took off in the US, but I've never seen a CD player incapable of playing them, including slot-loading CD players.I have exactly two. Ill-fated 3" CD singles - one of Lloyd Price, the other of Fifth Dimension. Bought 'em back in the late '80s, when the cassingle and the 45 RPM record were still about neck and neck. (And there were still some 8-tracks for sale in that store.) They were a pain in the butt because they took up as much space in your CD collection as regular CDs (I keep them in ordinary CD jewel boxes for protection).
I did find a benefit to them. I had an Discman D-33 portable CD player, and I'd occasionally play those CDs in it while I was walking to school. They made the CD player skip far less than ordinary CDs (these were the days before buffered CD players), and I loved them for that.
I guess it makes sense, when you think about it. Ignoring the center hole, A 5" CD has 19.6 square inches of 1mm polycarbonate plastic. A 3" CD has 7.0 square inches of the plastic. (pi x (d/2)^2)
Ratio-wise, the 3" CD is a little less than 1/3rd the area of a 5" CD, and since they're the same plastic, it would make sense that it would weigh about 1/3rd a regular CD.
Why would the lesser weight reduce skipping (and therefore make *any* portable optical disc more practical)?
A CD player has a motor which spins the CD from 500-800 RPM, depending on where on the disc it's reading. The motor is under the computer's control, and has to be a small motor to reduce power consumption and allow the disc to change speed quickly.
Of course, gyroscopic forces affect any rotating mass, and when you move a playing CD player, the effects of the gyroscopic force on the speed of the disc are dependent on the mass of the disc.
If the CD spins too slowly for the CD player to keep the playback buffer full, it will skip.
Because of the speed adjustments to maintain a constant linear velocity during playback, I think there'd also be less battery power wasted trying to make the motor overcome the greater range of disc speeds it would encounter with a 5" disc.
Finally, nothing involved with doing this isn't mass-produced already. You take an ordinary portable CD player, shave the pickup rails down to 3" size, stuff it into a small case with CD-ROM electronics and an MP3 player. Nothing to it, just a really great new application for a forgotten format.
Then, the only thing that I'd lust after is 3" recordable DVDs. All the benefits of the 3" CD-ROM in a player, but think of how many MP3s you could get in your pocket with that.
Okay. Maybe not the only other thing I'd lust after, but well up there.
Re:3 inch disc = power savings (Score:2)
Yes, they would slow down.
Re:3 inch disc = power savings (Score:1)
Re:Wonder if anybody else did this (Score:2)
So American isn't sexually repressed? Wouldn't a language grow to mirror the mindset of the people who speak it? On what planet is a language controlled by something other than how people use it?
Oh yeah... France.
-Erik
Re:Wonder if anybody else did this (Score:2)
I don't recall English having any gender issues. All the crazy continental european languages though.. I always wondered in French class just who decided that all cats are female and all dogs are male :)
Re:Wonder if anybody else did this (Score:1)
Re:No fixed point .ogg decoders (Score:1)
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GCP
Re:Why use a non-reconfigurable media? (Score:2)
Re:Why use a non-reconfigurable media? (Score:2)
Who needs to swap out a song if you have room for all the music you need? Swapping is something forced by the tiny memories of typical MP3 players. I have a player that uses full-size CD's and can store 10 hours of music at 128 KBPS. If I had infinite resources I'd have a Nomad or something similar and have every CD I own available. I don't see the point of memory-based players that can only store a dozen songs or so.
Re:CD Mp3 player (Score:2)
Re:CD Mp3 player (Score:2)
My wife has the RioVolt and the battery lasts MUCH longer when playing MP3s.
Re:CD Mp3 player (Score:2)
I Had one of the original eXpaniums... (Score:2)
The volume, when turned up all the way, was not load enough. It did not display filenames or anything; everything was a song number inside a directory number.
The whole interface seemed flaky. You couldn't skip forward/backward in mp3's; if you paused mp3's sometimes the time counter continued to advance. It put 2 second gaps between songs automatically.
The only things good about it were that it took cd-rewritable and had great skip protection.
These experiences make me quite skeptical about this new version...although you can get those half size cd's cheaply at cdrexpress.com [cdrexpress.com], as well as black cd's (like the playstation game).