Can Anyone Please Walk Me Through This?

No we do not all agree. Not as a personal attack, but you seem overly rigid in your position, so much so that I question why you're even bothering with an iPod.

I agree that MP3 style compression is not high end audio, but I still argue that for certain types of music (modern pop/rock/country) the sonic losses are quite small. Also, it's not unreasonable to argue that due to their high background noise levels that any car system is not high end. If the car system can't be high end, then why quibble over whether the source is high end enough?

I use an Apple computer with my iPod and primarily use AIFF type files. AIFF is Apple's version of a WAV and it uses no compression whatsoever. iTunes automatically tags the files with album/song data and that info is easily transferred to the iPod. I have never experienced any buffer or skipping problems with my iPod and this includes the playback of several single songs that last more than an hour.

Regarding battery life -- yes, using uncompressed files will shorten usable battery life due to the greater use of the hard drive. I've read that the battery in 3 series iPod can sustain approximately 400 charge/discharge cycles. Obviously you're better off not letting your iPod fully discharge. At home you should always leave it plugged in. In a car you should use any of the readily available third party supplied lighter adapter chargers. There are also add on battery packs that claim to more than double the usable discharge time of the iPod. Worse comes to worse, Apple will replace dead batteries for $99 installed.

With a 30Gb iPod using AIFF files I typically achieve 5-6 hours battery life and can store 650 songs. When I really want to load up a lot of music I copy the selected files to AAC (192kbps, mono) and then can store nearly 4,000 songs on the iPod. Mono works for me since I would only listen in the car and stereo information just isn't important
to me in such an environment.

Your next to last paragraph perplexes me. By design an iPod is not a high end oriented device. It's a convenience, lifestyle oriented product. I know that there are some audiophile who use their iPods with expensive cables and there's probably somebody out there contemplating how they can cryo theirs, but I still maintain it's not being entirely realistic to hold the iPod up to high end standards. For what it is the iPod is a great product, but you have to accept it for what it is. If you require true high end sound quality in a digital portable playback system you might want to consider one of the various Nagra products.

I disagree on a few points. First, read this article here:

http://www.geocities.com/altbinariessoundsmusicclassical/mp3test.html

Realize that 1.) To claim that your hearing is superior to some of these folks, while certainly possible, is unlikely. And if you're going to be straining like they were in a critical listening session, the ipod is not for you. 2.) The -alt preset mp3 encoding suggested in this thread is far superior to the mp3s used as test samples in this article.

Also, Apple's lossless compression is...lossless. I'm not really sure what you're going to add to lossless in any setting to make it sound better.

And, forgive me, but aren't you looking for a format for an ipod? You're not sitting in an anechoic chamber. You're going to be listening to headphones (and if it's the Apple earbuds this whole thread was for naught). You're probably not even going to be using a portable amp and I can guarantee you this, without an amp, any headphone straight out of the ipod jack is utterly incapable of resolving any difference in what may, or may not, exist between -alt present mp3s, Apple lossless and wavs. Even with an amp, my Shure e5's (while they might not be the ultimate headphone, they're pretty close) and Senn 600's made my VBR mp3s sound pretty fantastic--every bit as good as the original wavs.

What this all boils down to (and correct me if I'm wrong) is that you haven't even tried these formats yet. As always, trust your own ears. And while I am very thankful for a great deal of advice gotten from A'gon, I have come to the point where I realize, based solely on my hearing (which as a musician isn't shabby) that a lot of it is crap posted by people that must feel that they own the best. If possible, do some ABX testing so you can be honest with yourself. I think you'll be shocked. But regardless, I'm interested in hearing the results

I'm sure there are situations where there is an audible difference between mp3s and wavs. After all, mp3s are a lossy compression format. However, the ipod is not one of those situations. But for this reason, if your sole interest in this project is to make digital backups of your music, then obviously do not use the mp3 format. Personally, I have backups in FLAC (a lossless compression format) and those same cds in -alt preset standard mp3s for use on my ipod. Even if you have a thousand cd's, this solution isn't going to cost you more than about $100 in hard drive space. You'll have the peace of mind knowing that your music is backed up in a perfect format and you'll have the added benefit of enjoying a boatload of great sounding music and battery life (as good as the ipod gets at least).

Edesilva, you might be interested in the last post on this thread on hydrogenaudio regarding the -alt presets. By the way, Dibrom is the author of those presets.

http://www.hydrogenaudio.org/index.php?showtopic=3155&st=0&&

I dont think I am as rigid as the tone of my post might have suggested. I am glad, however, that this has inspired a lively discussion and thank you everyone for your thoughts.

I am not trying to brag about my golden ears, and perhaps I was listening to 128 MP3s (which many of you have suggested are far inferior) during my test which actually was in my car.

To further shock and astound you, you would see from the "what car do you drive thread" that the car is a Porsche Boxster S with a stainless racing exhaust. Somehow -- even with the roof down -- a harder and more fatiguing quality was apparent on the MP3s vs the WAV files.

The system consists of a Nakamich CD-400 using low level outputs to an a/d/s amp, with a/d/s woofers in the door panels, addl soundproofing, and mediocre upward firing mid/tweeters in the dash. The iPod connects through a cable -- not cryogenically treated -- as the Nak has an aux input switch on the front panel.

Obviously, I am not trying to debate resolution, transparency or inner detail most of which will be lost in a car environment, just the sensation of listener's fatigue.

I dont necessarily expect the Ipod to be a high end device, and I am happy to listen to music casually on things that are not "high end".

But why not pursue the best when experimenting with a new format?

Sorry if my earlier post come off sounding like I was bashing you. It just seems to me that you're being unrealistic with what the iPod is capable of doing. Just my opinion.

You're real lucky that you Porsche/Nakamichi has a front panel aux input. It makes hooking up the iPod much easier. I'm reduced to using a cassette adapter or an add-on FM transmitter. Both work, but neither is a particularly elegant solution.