Speculation On a Lossless iTunes Store 321
DrJenny writes "C|net UK has up an interesting blog post predicting that within 12 months Apple's iTunes Store will include a download center for lossless audio. This would be a massively positive move for people who spend thousands of dollars on hi-fi gear, but refuse to give money to stores that only offer compressed music — they could finally take advantage of legal digital downloads. The article goes into details on how Apple's home-grown ALAC lossless encoding relates to FLAC, DRM, and the iPod ecosystem."
they make money on the razors (Score:5, Funny)
Lossless? I thought the iTunes store was a loss leader?
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I'm sure I'll be modulated for saying this, but (Score:4, Funny)
Re:they make money on the razors (Score:5, Funny)
No clue. I refused to read the linked article, because I'm a graphics snob, and they used JPEG graphics instead of lossless TIF files.
"Lossless"? Such BS (Score:4, Insightful)
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Re:"Lossless"? Such BS (Score:5, Informative)
Now 24/96 has its uses if you're mastering something, so that any errors introduced in the mixing process are below the quantization error in the final 16/44.1 product.
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Really? I have a square wave, a sine wave, and a sawtooth wave, all at 22KHz. Now, you tell me how they'll be quantized such that all are accurately represented.
Either Nyquist is wrong, or you're misrepresenting his "theorem".
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Your 22kHz square and sawtooth waves have higher frequency harmonic content. If you don't believe me, go work the fourier transform -- it's not actually that hard if you replace the sawtooth wave with a triangle wave. Regardless, what that means is if you took your 22kHz waves, and ideally low-pass filtered them at frequency f, 22kHz
If you don't believe me, you can (sortof) do the experiment yourself. Generate the waves at 1kHz and at 10kHz and play them back. With the 10kHz waves, they'll sound diff
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Now, go read the grandparent and find out that you're actually supporting my argument...
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"The ear can't pick fundamental sounds at more than around 20 khz" != "the ear does a fourier transform and discard all harmonics above 22khz." The signal processing that a ear does to localize and identify sounds is a little more sophisticated.
I didn't do a double blind test, but even a seemingly small difference between a DAT recording at 44.1 a
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You're missing 2 things. First, to get response to 22kHz or more, you need 44kHz or more sample rates -- remember, you can only represent frequencies out to half the sample rate. Second, there are lots of potential artifacts introduced by sampling. This includes aliasing artifacts both in the original sampling, and in any later sample rate conversions. Aliasing artifacts in the original sampling are (ideally) removed by an analog filter before the ADC; that filter may very well not actually be adjustabl
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Band limiting the signal ("anti-aliasing"... or your "analog filter before the ADC") is the key, because without this, there will be artifacts like you describe. And those ARE audible to our ears below 22 kHz.
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The problem with that notion is that the standard test for hearing perception is to play pure sine waves of varying frequencies and ask the listener if they can hear them. However over the millions of years of human evolution, it was not until the invention of the tuning fork in 1711 that any human ear had heared a pure sine wave. Up until that point it had evolved to d
Re:"Lossless"? Such BS (Score:5, Informative)
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What are you talking about? These manufactured idol bands sound exactly the same in person as they do with studio processing. After all, in their concerts, they're just lip-syncing to their recorded music.
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You do know that most studios record on 16bit 48khz equipment, right? That 4khz doesn't make much of a difference. In fact, most studio masters are slap-dash affairs. Bad mikes, bad recording equipment, inadequate space, etc. All that crap puts all but the very best masters far below what CD Audio is capable of. In this real-world context, there is no point at all to formats like SACD and DVD-Audio. What people actually WANT is pretty clear. People want CDs with a 5.1 Dolby Digital mix, or an equivalent sur
24/96? (Score:2)
That is also a very popular standard for audio, and is better than CD quality, by quite a bit.
What would be nice is a losslessly compresses 24/96 5.1/7.1 channel audio format to be their choice.
Re:24/96? (Score:4, Informative)
But, 96 KHz sampling? You do know the Nyquist theorem [wikipedia.org], don't you? You are aware that top human frequency tops off around 20 KHz, right? That 48 KHz, even with 24-bit precision, should take care of all sounds possible for the human to hear?
I've had audiophiles* just snub their noses at mathematical proof and regrettably inform me that I do not have "the golden ear." I wonder if there have ever been any research on whether self proclaimed audiophiles REALLY have magical hearing.
(* You didn't say you were, don't take it personally. When I see super-high sampling rates bandied about I get a little red.)
Re:24/96? (Score:5, Funny)
On the internet nobody knows you're a dog...
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i have trained eyes too. i see all sorts of compression artifacts on digital TVs that nobody else notices. i wish i could turn that ability off! or just bring back the analauge signal!
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However, audiophiles are loons. I can hear CRTs, but I can't tell the difference between 320k MP3s and CDs, and other such comparisons. Heck, I can't even tell the difference between 320k MP3s and 192k MP3s.
But audiophiles are loons for more than just that; they actu
let's take a tour of the Nyquist sampling theorem (Score:5, Informative)
Well, not entirely. You see, if the source material contains frequencies above 22.05kHz, they will end up "aliased" onto another part of the frequency spectrum. In short, the extra high-end becomes noise. Information is lost.
Here is the important part, in practical terms. In order to prevent aliasing, the source material must be low-passed to remove the unrepresentable high frequencies. Low-pass filters are not perfect; in order to toss out the frequencies we don't want, we end up attenuating some of the frequencies we do want. Thus it is not uncommon for high-frequency rolloff to begin in the mid-teens of kilohertz, even though we're aiming for 22kHz as the corner frequency.
This causes a real, human-audible difference in the finished product, and it is practically impossible to avoid.
Now, with a 96kHz sample rate, we aim to squash all frequencies above 48kHz, and our non-ideal low-pass filter starts to work in the 30kHz range. The imperfections in the low-pass filter are only apparent at frequencies humans can't hear. The finished audio ends up sounding like the source material, with no human-detectable loss in fidelity.
This is why 96kHz is a good idea.
Re:let's take a tour of the Nyquist sampling theor (Score:3, Interesting)
Very well put. It's one of the things that makes the delta-sigma modulation at very high sample rates used in eg SACD interesting. Of course, it would help if the data stream were easier to work with, which is why I think 24/96 or even 24/192 is superior overall.
The problem gets even more obnoxious if you care about the flatness and phase response of your filter. The one time I've done data acquisition work that cared about such things at 20kHz, we ended up using a 250kHz sample rate in order to give t
Re:let's take a tour of the Nyquist sampling theor (Score:2)
For a studio (Score:5, Insightful)
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Exactly. I always record at 96 khz (though I'd rather use 60 kHz if equipment supported something in that range) and downsample to 44.1 after processing.
There's another reason to use a higher sampling rate in studios: IIRC, plug-ins that do heavy duty DSP stuff like pitch correction tend to produce less artifacting at higher sampling rates because they have more intermediate points to work with. I don't remember the details, but I think it makes pitch detection more precise as well.
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Re:let's take a tour of the Nyquist sampling theor (Score:2)
Re:let's take a tour of the Nyquist sampling theor (Score:2)
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I wish I could find the link, but there's reasonable evidence from blind listening tests that people, though they would not necessarily report any quality difference, were able to report things about the recording like "I can tell the cello is sitting in front of the viola" and other things that are very subtle and spatial. This of course depends on headphones and careful binaural recording, so on most end products it wouldn't make much of a difference.
In my line of work, most sound designers are recordin
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96 KHz sampling?
Yes, it's overkill for what you hear. But my understanding is the higher sampling rate helps the final product when processing the audio further. So maybe when a DSP in a receiver adds some effects it will sound subtly better?
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Am I missing something?
Of course, this isn't exactly the same as recording the dog whistle itself, because there may be some directionality component caused by the interference, a
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Re:24/96? (Score:5, Insightful)
Sampling at higher frequencies makes it easier to build a good output filter. That's a very secondary or tertiary level effect, so it doesn't really make much difference, but it theoretically could.
Note that this is assuming the standard PCM encoding. "Single Bit"/streaming encoding (like SACD runs at fantastically higher sample frequencies, but the frequencies aren't really comparable (and it's not a good way to go because you introduce other issues (like tons of quantization noise).
The only identified issue with the standard red-book CD format is the dynamic range, but there are so few sources that need more than 16 bits and certainly very few playback systems/environments that will let you take advantage of it, it's essentially a non-issue. HDCD (which is a 20-bit PCM format) addresses this but hasn't and probably won't become common.
Bottom line - the guys who came up with the audio CD sampling format pretty well knew what they were doing and there aren't any practical limitations in the recording format. Everything else in the system (from microphone to engineering to speaker) is the limiting factor.
Brett
Re:24/96? (Score:5, Interesting)
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Go read about Nyquist's Theorem before spouting falsehoods.
Re:24/96? (Score:5, Insightful)
Enough with the 24/96 wet dreams. Yes, 24/96 does offer real advantages for mixing houses in terms of being able to normalize levels generated by different sources and reducing the complexity of filters. But 16/44.4 is perfectly fine for home audio playback.
What does >16 bits get you? More dynamic range. BFD. 16 bits gets you (realistically) 90+ dB of dynamic range. Unless your listening room has a background noise level of 20 dB or less (trust me, it doesn't), you're not even enjoying the true benefit of the 16-bits you have now.
What does > 44.1kHz sampling give you? Wider frequency response. BFD. Let's assume that most people have good hearing beyond 20 kHz (very few do). Let's assume that most music/movie content has lots of information above 20 kHz (some do, most don't). Let's assume that your speakers can reproduce signals above 20 kHz (some can, most can't). There is still the issue of how you get that > 20kHz info on your recording on the first place. You see, most microphones don't record signals out that high, and of those that do, they only do so over a very narrow angle. When we have tech that can produce mics that are omni-directional above 20 kHz for reasonable costs then maybe you'll have an argument.
Let's deal with the loudness wars before we start worrying about 24/96.
sampling frequency and signal frequency !mix-up (Score:2, Troll)
That said... the sampling frequency shouldn't be mixed with the signal frequency in the way you mention; e.g. 44.1KHz, divide by 2 (yay Nyquist), ~22KHz is the maximum frequency you can sample. ergo: 96KHz allows y
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Ah, true, but...
A 400Hz sine wave is now -also- sampled at the 96KHz level. Suddenly, that sine wave is looking twice as smooth.
No, it's not. If a 400 Hz sine wave is sampled at a mere 800 Hz, it can be reproduced per
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But back to gold, it's a good conductor. It's not as good as copper or platinum, however, and costs a lot. But it doesn't corrode, unlike copper, and it's cheaper than platinum. This is why it's frequently used for contacts in high-reliability applications.
Unfortunately, most people incorrectly assume that because it's expensive and p
Re:24/96? (Score:5, Interesting)
I did not expect to hear as big a difference as I did. 24b absolutely crushed 16b in the oh-so-unscientific terms of listening enjoyment. Everything, especially the cymbals, sounded clearer, less harsh and brittle, more defined. We had to throw away some good 16b takes because they sounded so much worse than the 24b recordings.
Don't be so quick to discount the difference that a little extra dynamic range can make. Sure, you might not notice when you're listening to your iPod in your 89 Chevy Cavalier with the burned out left rear speaker, but it's not as hard to tell as you might think.
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Every time your audio level goes down by 6 db, you lose a bit. Once you are down by 48 db, you only have 8 bits to resolve the waveform. With 24 bits, you'd still have 16 bits left working for you at -48db.
A higher sampling rate also gives you are more accurate sound, especially when the waveform is complex. Sure, a sampling rate of X can give you a frequency response to X/2. But when you have many frequencies in the range X/F where F is less than 10, they can easily get jumbled together and result in
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I can't speak for Apple's ALAC, but FLAC [wikipedia.org] "can handle any PCM bit resolution from 4 to 32 bits per sample, any sampling rate from 1 Hz to 1,048,570 Hz in 1 Hz increments, and any number of channels from 1 to 8. Channels can be grouped in cases like stereo and 5.1 channel surround to take advantage of interchannel correlations to increase compression."
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Finally...an archive format (Score:4, Interesting)
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Same here. I've been bitching for quite some time that there was no way to purchase songs online that weren't less than CD quality...if they will offer lossless formats, with no DRM, I'll pay a fair fee. I want to use what I purchase in lossless format on my home system, and be able to rip it to mp3 or whatever for poorer listening environments like the car or the portable for the gym.
Bravo!
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Re:Finally...an archive format (Score:5, Interesting)
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First off, I haven't heard anything about the other major labels switching any time soon. Maybe they will and maybe they won't.
Moreover, I think that businessmen who are otherwise satisfied with removing DRM on AACs will b
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Any chance of better-than-CD? (Score:2)
It's good to see the possibility of lossless music nevertheless.
Let me translate... (Score:5, Insightful)
"And now I have an inkling Apple will add lossless music downloads to the iTunes Store within the next 12 months."
Translation:
I have no fricken clue that this will ever happen, but because I think it'd be cool if it did, I'll go ahead and blog about it.
The reasons I'll never adopt DRM lossless audio... (Score:2)
The ease of access argument is null, in my mind, because it has DRM and any ease is negated right the
Re:The reasons I'll never adopt DRM lossless audio (Score:4, Funny)
Watch out, you're about to start an argument with all the people who think that it's normal for good bands to make albums with only one good song.
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Honestly, I'd buy them if they are lossless and I can burn at least one audio CD. Because it's lossless, converting it to a CD and re-ripping it back as a DRM-less lossless audio file will not result in any artifacts. It works for me.
So... (Score:4, Insightful)
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May I suggest this thing called the "Internet"? There's websites such as amazon.com which will sell you CDs for less than your local store, without you having to leave your couch.
Complain about storing and ripping all you want, but not liking music stores is a silly reason to avoid CDs in this day and age. Heck, most of the stand-alone music stores are going out of business because of iTunes and Amazon, as well as Wal-Mart and Target.
Or they could just stick with CDs (Score:3, Interesting)
Re:Or they could just stick with CDs (Score:5, Insightful)
I do realize they still sell them, but are they $0.99 per song cheap?
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I assume you're referring to 45's. Adjusting for inflation, $0.99 in 1979 (the year I bought the 45 of the song "Funkytown" at Woolco) would be, according the the BLS calculator [bls.gov], $2.87 today.
Around 1990, there were CD singles. Granted, they were intended to be replacements for 12" maxi-singles and not 45s, but they were $5. And the record companies killed them because they thought CD singles were "too cheap" -- that they were canibalizi
Finally! DRM free, lossless, digital music! (Score:5, Insightful)
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Also, it will be digital, so any self respecting audiophile should instantly dismiss this format because the quantum fluctuations that are part of the original audio are not represented to a high enough precision turning the recorded audio into near white noise useless garbage (aka pop).
Lossless iTunes store? (Score:2)
iTunes won't get any more sales from me... (Score:3, Informative)
I did this for 3 reasons... 1) iTunes stopped supporting Windows 2000. (Yes, I know it's old, but I don't have to deal with the stupid BS Microsoft has built into XP, like WGA). 2) The 1.2.1 Apple firmware for iPod Videos gave me trouble with a bunch of my MP3s--cutting off the song at the 75% marker and refusing to seek within the track. (Of course, the catch-22 is that I can't get a newer iPod firmware from Apple since they refuse to support W2K). 3) I never liked the way iTunes worked in the first place...
I don't hold out much hope that a lossless format sold thru iTunes will truly be lossless. After all, converting an LP to 16-bit 44.1KHz WAV is, by definition, lossy (but outside of the perceptions of 95+% of the people out there)... To add, part of the reason that iTunes even sells DRM-free music is because the record companies can say "if you want higher quality, buy the CD or, better yet, vinyl!" So, I doubt many record companies will be selling uber-high-quality lossless tracks through iTunes...
Rockbox (Score:2)
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So, just to get this straight: You think of Vinyl records as a lossless format and believe they have a hi
DRM silliness (Score:4, Insightful)
Then people can re-encode the files to their format of choice. But by then, most consumers have said "fuck it" and decided to just download their format of choice directly from p2p or usenet because it's easier and simpler than paying Apple and still violating the DMCA just so the music they paid for will work on the audio player they own.
Oh wait, that's already the status quo... Never mind.
If you wish they'd just adopt FLAC... (Score:5, Informative)
almost everyone else distributing lossless (except musicgiants) is using FLAC [sourceforge.net] and/or WAV. it's supported by almost all s/w except itunes, hell you can even get wmp to play FLAC with some work.
re:TFA, lossless is not directly about quality, mp3 and aac both can be perceptually transparent for the most part, it's about (depending on your personality) perceived quality or format independence -- i.e. being able to transcode to the format you need without quality loss.
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They support WAV, they support ALAC. Transcoding between these doesn't result in a loss of quality. So why would they support FLAC unless it was just to decode from FLAC into something else?
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My understanding is Apple Lossless was created because it could be implemented efficiently on an iPod using only integer math, which FLAC couldn't at the time.
that's incorrect, the FLAC decoder has always used only integer math and from the beginning was lower complexity that ALAC.
iTunes can certainly play FLAC (or Ogg or whatever else you want) by installing a QuickTime component that handles the format.
I think that has since broken but when working it basically "imports" into itunes (loading the whole file before playing, causing delay) via quicktime and does not support metadata.
Cool if/when it happens (Score:3, Insightful)
A - If I'm going to pay extra for DRM'd lossless, I better get the cheap lossy version for free (for my phone, wife's iPod, whatever) because paying them to compress a song for me is ridiculous,and
B - It will be a moot point if the player won't play all the FLAC I already have, because I won't own the player. It's why I don't own one now.
Lossless piracy? (Score:3, Insightful)
Lossless is a great idea and may open up a new market to the iTMS, but I can't image it's going to offset piracy. I'd think it will offset physical CD sales.
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why it's not about FLAC+DRM (Score:5, Informative)
apple's got nothing to fear from FLAC, it can actually be used to their advantage to get a leg up on the competition, since for lossless electronic distribution FLAC is becoming the de facto standard.
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I dunno... (Score:3, Interesting)
So for Apple to seriously consider this, they're going to have to figure out if there are enough audiophiles out there willing to pay that kind of money for downloads.
Personally, I kinda doubt it.
tag: rumorsrumorsrumors (Score:2)
Contradiction (Score:2)
For serious?
If you've got thousands of dollars to toss around on audio equipment, you're seriously going to be stingy enough to illegally download music on the principle that you don't want to pay the $2-$3 more it costs to buy the physical CD?
I'm sorry, but that's got to be one of
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I hate to be a troll, but do those really exist? It seems like the selection of movies released on LaserDisc is better than the number of albums on DVDA or SACD.
Music doesn't really benefit all that greatly from multichannel audio or an increased bitrate. The current CD bitrate is high enough that human hearing shouldn't be able to tell the difference between anything with a higher bitrate (There are 'proper' double-blind studies to back up this
Audiophiles (Score:2)
AIF, AAC, RAW for Audio (Score:3, Interesting)
If any of you remember cassettes, low end MP3s are about equal (IMHO).
I haven't bought / downloaded any music because of this factor - it's just not good enough when I can purchase the CD and deal with it from there.
AAC is pretty damn good, but no, I can tell the difference for the most part and well, really, come on, get real - they already SELL it lossless, it's not like you're twisting knobs to transfer it to the hard drive.
If anyone can get the majority of the Corporate Music above the line brain dead to listen, it'll be Jobs, and Team Apple, both of them.
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Apple can cater to the portion of the market that has rejected AAC, while simultaneously ensuring lock-in by using their proprietary codec that isn't interoperative with other players.
Umm, the OSS libavcodec has played ALAC for over a year and Mplayer and VLC both can play it as a result. That's not a lot of lock-in.
Win for Apple, and lossy everyone else, including customers. (Inless[sic] they have the wisdom to just say no and keep buying CDs. And iTunes store's popularity suggests lots of people don't.)
I've bought a couple of songs from iTunes Music Store, when they were not easily found elsewhere. Getting rid of the DRM was not hard, even without burning a CD or losing quality. Apple is moving away from DRM as well, as fast as the studios will let them. They don't care about the music. They just want it easy for people to use iPods and they seem pretty content to let
Do you understand what "lossless" means? (Score:2)
Or you could transcode to mp3 and play it anywhere.
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AAC is not proprietary to Apple. It was designed to be the successor to MP3 by the designers of MP3 and is designated MPEG2, Part 7. Fairplay extensions to AAC is proprietary to Apple. Many software and hardware play standard AAC according to wiki [wikipedia.org], even the Zune. As for lock-in for Fairplay, it exists if and only if you w
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AAC is not proprietary to Apple.
I think you're misunderstanding the grandparent post. He was talking about Apple providing ALAC for users that did not like AAC. ALAC is "Apple Lossless Audio Codec" and is an Apple, proprietary technology, not another name for AAC or an MPEG standard.
Aside from that, being a lossless format, it is already possible to convert it to any other format losslessly with existing freeware and several software players have reverse engineered it and play it just fine. Lock-in is not really a concern.
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So with hard drive sizes getting large enough that a
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Re:Flac is gay.. (Score:4, Insightful)
Perhaps a better way of putting it would be 'the human ear cannot distinguish between 320kbps MP3 and FLAC if listened to on iPod headphones', which is fair enough. There's no need to include everything if all I'm going to do is listen to it on the bus. Which leads to my original point - MP3 is lossy. AAC which is my format of choice is better quality for the space and bitrate, but is still lossy. FLAC isn't, which means I could have my lossless FLAC copy on my desktop where there's easy storage space, then have iTunes automatically create reduced quality versions for carrying around on my iPod. Compression from lossless source is always better than compression from an already compressed copy.
Not to mention that the iTunes store *isn't* 320kbps. 128kbps for the normal content, 256kbps for iTunes Plus.