How are Hi-Fi Magazines Dealing with MP3s?

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It's been a long time since I've picked up a Stereo Review or Stereophile and I am curious -- how are these publications dealing with MP3s? Do they poo-poo the sound quality? Are they performing listening tests with various encoders? Is it causing a shift in the hi-fi world anything like the one that happened when CDs were introduced (which is the time I had a subscription to Stereo Review)?

Mark (MarkR), Tuesday, 1 June 2004 13:18 (twenty-one years ago)

I've been wondering this very same thing, Mark. At what point will receivers come out designed especially for the MP3 (and not CD) user?

Yanc3y (ystrickler), Tuesday, 1 June 2004 13:29 (twenty-one years ago)

As far as I can tell the UK mags are hoping it'll all go away - but that's only an assessment from the cover articles (I can't stand reading the things any more). Plenty of valve amps, beautiful turntables and DVD-A v SACD contests but I don't see much of an analytical approach to MP3 encoding. I could've just missed it.

Funny, they gave plenty of column inches to Nakamichi and their cassette decks and no one was ever extolling chrome tape as an audiophile format.

Michael Jones (MichaelJ), Tuesday, 1 June 2004 13:33 (twenty-one years ago)

There was some hi-fi unit MP3 player in last months' What Hi-Fi on this side of the pond. The reaction seemed to be "the sound will never be great but it's v.v. useful".

Sick Mouthy (Nick Southall), Tuesday, 1 June 2004 13:33 (twenty-one years ago)

For a hi-fi mag to admit that 192k MP3 or AAC or whatever represented acceptable sound quality would mean their entire value system came crashing down; these are the people who would have you buy $200 digital interconnects, remember (ok, maybe not WH-F). They can hear huge differences between CD playback on a 500 quid machine and the same on a 1500 quid machine, so the notion of data-reduced 'near-CD quality' playback is anathema.

Michael Jones (MichaelJ), Tuesday, 1 June 2004 13:40 (twenty-one years ago)

I don't think compressed (mp3, wma, ogg etc) formats will sound much different with hi-fi equipment. In my experience, even hi-end hi-fi speakers and amps color the sound too much, they make bad things sound good.

I’ve used pretty nice hi-fi equipment over the last few years in my studio (where I listen to most music). I finally got some proper studio monitors (Mackie Hr824s with a matching Mackie sub) and the first thing I noticed was how shit all the music on my computer sounded compared to how it sounded on CDs (using the same output from my computer for both).

From what I can hear, very low frequencies become much less defined and the higher low end 100-500 Hz seems to distort in places. It also seems to affect the very high frequencies that on paper someone pro-mp3 would say can’t be heard by humans, this is true; however, I think it does affect how the other high frequencies that we can hear come across. I really notice this with high pitched droney music, and stuff where the hi-hats have been recorded really crisply.

I don’t like mp3s anymore!

TomB (TomB), Tuesday, 1 June 2004 13:52 (twenty-one years ago)

The first time I really noticed how much low end you lose with mp3s was when I heard someone DJing with final scratch over a good club PA. I've no idea what bitrate the tracks were encoding at, but the loss of bass was hugely apparent compared to the vinyl that the previous DJ had been playing.

Graeme (Graeme), Tuesday, 1 June 2004 14:01 (twenty-one years ago)

Those expensive CD players are designed to make CD's sound like vinyl, aren't they? (something to do with adding "good" distortion to richen the sound).

In that sense, audiophiles haven't accepted CD's as an acceptable sound format, because the high end players they cream over are all designed to improve "typical" CD sound (which is considered far inferior to vinyl or certain mag. tape formats).

Thus, I wouldn't expect them to give mp3's any love, either.

And I'm no audiophile, but there's a huge difference in sound quality between 192 kbps and CD-quality wav, definitely as large a difference (to my qualitative ears) as between CD and vinyl.

Barry Bruner (Barry Bruner), Tuesday, 1 June 2004 14:04 (twenty-one years ago)

how important is that difference to you? as a non-audiophile digital music consumer, does sound quality matter as much as it used to in the analogue era? that's what I wonder about. CDs were sold as an "improvement" over vinyl yet I think you're right about audiophiles never accepting that.

lovebug starski, Tuesday, 1 June 2004 14:18 (twenty-one years ago)

I don't think its just audiophiles who want the best sound quality.

What about music that relys heavily on the production and the actual sounds involved? I couldn't listen to say, Fennesz over a shitty little portable cd player, it wouldn't work, or this thing tends to happen where or what you are listening to the music on becomes part of the listening experience, which is a whole other discussion...

What about people who really enjoy certain types production, high end audio equipment can make many an album sound shit, suddenly theres loads of bass and the balance is all different. Or you have to spend ages reconfiguring the eq to get it sound how it should.

There are so many details that come out of music once you listen to something through a better system, in a better environment that you may have not noticed before. I don't think this is just an 'audiophile' thing.

Personally, I like to listen to stuff over studio monitors because if your room is set up nicely, it'll sound quite a lot like it was intended to sound by the person who produced it. Also, compared to what you can pay for high end hi-fi equipment, studio stuff is cheap!

TomB (TomB), Tuesday, 1 June 2004 14:52 (twenty-one years ago)

Those expensive CD players are designed to make CD's sound like vinyl, aren't they? (something to do with adding "good" distortion to richen the sound).

Well, some expensive models out there may well do that inadvertently (big price tag doesn't necessarily preclude lousy engineering) and hence develop a bit of a reputation for standing out from the crowded field of similar-sounding CD players, but generally speaking I don't think is the aim of audiophile manufacturers. There is one very expensive DAC on the market which dispenses with brick-wall filtering altogether (technically a step backwards - inducing all manner of aliasing artefacts) but has received rave reviews (and a few brickbats).

Questions of "warmth", "analogue richness" and the like come down far more to the recording itself and the speakers than any particular CD player, I think.

I haven't A/Bed MP3s and CD originals for a couple of years, but when I did I was really struggling to cite a difference at anything over 192k (it's all material-specific, obv.) It's the high frequencies and stereo imaging that go first in my experience; I can't say I've noticed the lack of bass.

xpost

Michael Jones (MichaelJ), Tuesday, 1 June 2004 14:53 (twenty-one years ago)

what encoder were the mp3s you compared made with? different encoders = different psychoacoustic models which will drop different kinds of audio information. you *did* use LAME, right?

re: the original question, commercial hi-fi magazines don't have much incentive to focus on mp3s and mp3-playing equipment because the readers who empty their wallets to try out each one of the however many amplifiers Stereophile thinks it can get away with stuffing into Class A wouldn't touch lossy compression with a 10-foot interconnect.

common_person (common_person), Tuesday, 1 June 2004 15:31 (twenty-one years ago)

I kind of trust Mike's ears when it comes to home listening. As is being talked about in the Is moving away from vinyl killing dj-ing? thread, I wonder if the bass thing does come into play with decent club PAs, though, even with using a decent encoder at 256kps or whatever.

N. (nickdastoor), Tuesday, 1 June 2004 15:39 (twenty-one years ago)

Sorry for the excessive decency.

N. (nickdastoor), Tuesday, 1 June 2004 15:40 (twenty-one years ago)

how important is that difference to you?
The main improvement of CDs over vinyl is convenience (this is a really really big improvement, though, certainly not to be taken lightly). Similarly, the main improvement of mp3 over CD is convenience. Sound quality-wise, there's no comparison (material specific, of course).
I mainly use vinyl for techno, so my ears are fairly sensitive to the differences between techno on vinyl and on CD (and thus, I HATE the sound of techno mp3's).
Other types of material demand to be heard with better sound quality (ref: the "100 albums that sound better on vinyl" thread, noise i.e. Fennesz, anything on Mego, etc.) but I definitely don't sit around listening to a CD thinking "this sounds like shit, I want my vinyl". Similarly with mp3's, although less so.

Barry Bruner (Barry Bruner), Tuesday, 1 June 2004 15:45 (twenty-one years ago)

I wonder if the bass thing does come into play with decent club PAs, though, even with using a decent encoder at 256kps or whatever.

Absolutely...three's no sub bass so minimal thumping / tingling feeling in your chest. Vinyl that's been mastered for a big PA will always trump a lossy digital format, even when played through a good compressor.

Graeme (Graeme), Tuesday, 1 June 2004 16:22 (twenty-one years ago)

I'm happy to believe the clubgoers on the sub-bass thing - I'm not a clubgoer (at least not in the MP3 age), the -3dB point on my Heybrooks is about 48Hz and I don't own a subwoofer.

Maybe there's some low-end roll-off with certain material (though it's not a genuine response limit like with >15k material for example; I've got Cool Edit open in another window and a VBRed Alva Noto track is showing plenty of activity below 30Hz*) but as Graeme says, it's more likely to be a question of mastering - the vinyl heavily EQed to sound massive through PA subs.

(* - I can sense my wife pushing imaginary spectacles up the bridge of her nose as I type that).

Michael Jones (MichaelJ), Tuesday, 1 June 2004 19:39 (twenty-one years ago)


--Those expensive CD players are designed to make CD's sound like vinyl, aren't they? (something to do with adding "good" distortion to richen the sound).

--Well, some expensive models out there may well do that inadvertently (big price tag doesn't necessarily preclude lousy engineering) and hence develop a bit of a reputation for standing out from the crowded field of similar-sounding CD players, but generally speaking I don't think is the aim of audiophile manufacturers.

There are such devices- I forget exactly what is done, but as originally posted- it introduces errors that make results in a more 'vinyl' sound

nothingleft (nothingleft), Wednesday, 2 June 2004 18:56 (twenty-one years ago)

> There are such devices

I can't say with certainty that this isn't true, but if people really are paying to have distortion applied to the outputs of their CD players, it's yet further proof of the dictum that there's a sucker born every minute.

Palomino (Palomino), Wednesday, 2 June 2004 22:09 (twenty-one years ago)

It isn't distortion = white noise, it's distortion that fills in frequencies that are lost through the process of digitization.

But yeah, there are suckers who will pay $2500 to get a CD player that sounds like a $250 turntable.

Barry Bruner (Barry Bruner), Wednesday, 2 June 2004 23:13 (twenty-one years ago)

Something that hasn't been mentioned yet; audiphile stuff can make a pretty big different with live and semi-live music where spacial positioning, nuances and dynamics are more important. f.ex. Classical, jazz, etc..

I remember that everytime I upgraded my speakers/source/amp/etc I re-listened to my collection and discovered new stuff and felt that I was getting closer to "how it's supposed to sound". Of course it must not become an obsession and come before the music, but I find that enjoyable music is even moreso on a good stereo.

Mikhail Capone (Mikhail Capone), Wednesday, 2 June 2004 23:53 (twenty-one years ago)

Oh, and for something more on topic, here's something that I wrote: Encoding Audio: CBR vs VBR, I think that everybody who rips CDs should check it out.

I'm tired of seeing CBR (constant bit rate) rips everywhere when the only good reason to use CBR over VBR (variable..) is when you are going to be streaming the audio and need to know exactly how much bandwidth you need.

Mikhail Capone (Mikhail Capone), Wednesday, 2 June 2004 23:55 (twenty-one years ago)

Mikhail, is this true regardless of (average) bit rate?
That is, there are diminishing returns with high bit rates -- e.g. a 320 kbps CBR vs a VBR with about the same average bit rate.
Encoding 128 or 192 kbps CBR vs (similar average) VBR, there must be a far greater advantage.

Barry Bruner (Barry Bruner), Thursday, 3 June 2004 01:05 (twenty-one years ago)

Barry, of course past a certain point the difference becomes less and less significant, but if what you want is really *top* quality and don't mind using lots of disk space, you should go with FLAC or SHN (lossless audio compression formats) instead of MP3/OGG in the first place.

But for most of the rips that are floating around (up to 256kbps, lets say), VBR is definitely a better allocation of ressources than CBR, even in the cases when the file ends up being about the same size as its CBR counterpart.

Mikhail Capone (Mikhail Capone), Thursday, 3 June 2004 01:18 (twenty-one years ago)

Yes, I figured so. Thanks for the answer.
I will definitely grab OGG Vorbis for my new computer.

Barry Bruner (Barry Bruner), Thursday, 3 June 2004 01:31 (twenty-one years ago)

It isn't distortion = white noise, it's distortion that fills in frequencies that are lost through the process of digitization.

What frequencies would they be then? Over 22kHz? Are you sure you're not thinking of SACD, where the extreme noise-shaping involved to get greater-than-CD dynamic range in the audio band produces a lot of supra-aural trash? Some people have speculated that this is somehow a good thing - very low mush leaking through yr super-tweeters.

Michael Jones (MichaelJ), Thursday, 3 June 2004 07:02 (twenty-one years ago)

surely the other advantage of cbr is it's quicker to encode? i presumed that was why there were loads more cbr mp3s than vbr ones.

toby (tsg20), Thursday, 3 June 2004 09:04 (twenty-one years ago)

In the age of leagl downloads, I was wondering how insurance companies are dealing with MP3s.

PJ Miller (PJ Miller), Thursday, 3 June 2004 09:34 (twenty-one years ago)

Are you sure you're not thinking of SACD
That sounds familiar. I somehow ran across these high-end players when I was shopping for a CD Player a few years back. I had no intention of buying one of them, but I found it interesting that such things exist.

I'm fairly sure Michael and I are thinking about the same thing ... smoothing of a digitized waveform ( = creating a greater than CD dynamic range). It's a lot easier to draw it out than to write about it.

Barry Bruner (Barry Bruner), Thursday, 3 June 2004 12:13 (twenty-one years ago)

Yeah, but the smoothing of the waveform has nothing to do with added distortion/vinyl-like noise - it's the very opposite (with SACD, the noise is shifted out of the sub-20kHz band to the higher frequencies, so you get better-than-CD dynamic range below 20k and a load of junk up where it'll only bother dogs and bats) - it's to do with a higher sampling rate.

Michael Jones (MichaelJ), Thursday, 3 June 2004 14:52 (twenty-one years ago)

I wonder if they're thinking of dither? For the unitiated, it's a process by which low-level white noise is added to digitized audio when its word-length is reduced (typically during the CD mastering process), to avoid truncation artifacts.

Palomino (Palomino), Thursday, 3 June 2004 15:23 (twenty-one years ago)

yeah I was thinking of dither.. but also come to think of it- the devices that essentially over-clock to eliminate jitter.. either way you are left with paying more in order to reproduce an analog sound.

nothingleft (nothingleft), Thursday, 3 June 2004 17:05 (twenty-one years ago)

yeah I was thinking of dither.. but also come to think of it- the devices that essentially over-clock to eliminate jitter.. either way you are left with paying more in order to reproduce an analog sound.

No, dither is not part (or has no reason to be part) of the playback process; I know there are a few models around (it all makes sense now - I'd totally forgotten about this little gimmick) - an upmarket Rotel springs to mind - which offer dither options but it's of dubious value on playback. As Palomino says, dither is used in mastering when reducing word-length to decorrelate the quantisation error; at the expense of a very slight increase in noisefloor, you effectively preserve more of the dynamic range of the (say) 24bit master. Dithering and noise-shaping means you can get 19-20bit performance in the areas to which the ear is most sensitive on an ordinary CD from a 24bit source. Standard practice for many years - and it's already on your CDs, no end-user hardware requirement.

Low jitter doesn't automatically come with a big price-tag either; I recall some run-of-the-mill Sonys showed much lower jitter figures in tests than fancy audiophile units - just good design around a stable clock. Certainly, the fashion (until the mid-90s at least) for two-box high-end CD players almost always guaranteed worse jitter performance.

Michael Jones (MichaelJ), Thursday, 3 June 2004 19:25 (twenty-one years ago)

surely the other advantage of cbr is it's quicker to encode? i presumed that was why there were loads more cbr mp3s than vbr ones.



That was true 5-6 years ago, I guess, but with modern processors (hell, even with my old piece of crap computer mp3/oggs are no problem) it isn't, so there is no reason for CBR anymore (except for streaming, as I said).

Mikhail Capone (Mikhail Capone), Friday, 4 June 2004 05:16 (twenty-one years ago)


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