iPod Sound Quality

polkatese · January 2005

Polkies,

I am curious, has anyone test iPod as a source, in a two-channel setup (i.e. with real audio gears)? any comments on its sound quality?

Assuming that iPod is a viable audiophile source, does it matter whether it is a mini iPod or the newly release tiny iPod, in terms of DAC quality?

TIA

Shizelbs · January 2005

More than anything, its going to depend on the quality of the MP3 that it is playing.

Toxis · January 2005

wav format doesn't sound to bad on it but then you're taking up a ****-ton of space. But anymore, you can still fit a lot on them (60gig, COME ON!!).

polkatese · January 2005

let's say, for discussions purpose, I stayed with 256 rate (I know, it will eat up space quickly), at that rate, would you say that it will be very close to standard redbook?

Teejai · January 2005

For what it's worth, Apple uses AAC file types for iPod and iTunes.
http://www.apple.com/mpeg4/aac/
I have not listened to music on an iPod before but from what I have heard from others it is pretty good quality.

bknauss · January 2005

Originally posted by polkatese
let's say, for discussions purpose, I stayed with 256 rate (I know, it will eat up space quickly), at that rate, would you say that it will be very close to standard redbook?

Nope. Overall, the amp and DAC on the iPod is pretty weak, so unless you get a digital out signal, its always going to sound fairly crappy, especially with the headphone amplifier built in. When we were doing comparisons of the XM tuner vs. the SkyFi, even before getting a real chance to listen to the SkyFi, you would notice how much quieter it was compared to the XM tuner. Also, the SkyFi lacked dynamics.

I've A/Bed AAC and MP3 before from one of my CDs, and at the same bitrate, AAC sounds noticeably better.

Toxis · January 2005

not to mention, the iPod automatically downgrades all high bitrate MP3's to 160, so even if you rip it at 320, you're just wasting your time. Wav is the only decent way of doing it.

polkatese · January 2005

Thanks for the education, folks...I wasn't aware of the downsampling by iPod, that's suck.

bknauss · January 2005

Originally posted by polkatese
Thanks for the education, folks...I wasn't aware of the downsampling by iPod, that's suck.

Wasn't aware of that either... thanks for the info Toxis!

Shell · January 2005

Dumb question, but what is Red book CD? I have seen that several times now.

Also, are the songs you buy from Itune or other sites the same quality as if you bought the cd, or do you lose something? Thanks.

Teejai · January 2005

http://docs.info.apple.com/article.html?artnum=61476

Compatible CODECS

iPod can play songs encoded with these CODECS:
MP3 (from 32 Kbps to 320 Kbps)
MP3 Variable Bit Rate (VBR)
AIFF *
WAV (with no compression)
The following require iPod software 1.3 or later:
M4A AAC *
M4P AAC (Protected) *
M4B AAC (iTunes Music Store Spoken Word files) *
The following require iPod software 2.2 or later or iPod mini 1.1 or later:
Apple Lossless Encoder
* Requires iTunes 4 or iTunes 4 for Windows. AAC files also require the most recent update to the iPod software.

Compatible sample rates

iPod can play songs with the these sample rates, and with all compatible CODECs:
8 kHz
11.025 kHz
16 kHz
22.050 kHz
32 kHz
44.1 kHz

Doesn't say anything about downsampling mp3s...maybe the older version of iTunes downsampled before it transferred to the iPod.

Toxis · January 2005

Originally posted by bknauss
Wasn't aware of that either... thanks for the info Toxis!

no problem. It was a little thing I found out the last time I was ripping CD's onto the ol' iPod. I was burning them onto the HD at 320k but noticed the file sizes were a lot less when they got onto the iPod. Looked into it further and presto... we're getting screwed. haha

jarros · January 2005

Originally posted by Toxis
no problem. It was a little thing I found out the last time I was ripping CD's onto the ol' iPod. I was burning them onto the HD at 320k but noticed the file sizes were a lot less when they got onto the iPod. Looked into it further and presto... we're getting screwed. haha

Are you sure? I took a quick look at iTunes, and you CAN configure it to rip the tracks to different bitrates (check the preferences). But you're saying that it reconverts the files when it transfers them to the iPod? That seems to be a VERY fast conversion, as each song takes a second or two...

mantis · January 2005

I have Installed Ipod to many different home theater and multiroom systems. It sounds ok like what was said above the quality of the MP3 will matter. This isn't a sit down and listen to detail device. But for house music it's fine.

Lesser quality systems it sounds almost like cd quality. It's close with a good recording. I was actually suprised. Don't get rid of your cd player just yeat but the Ipod id way cool and on my list of things to buy.

Dan

bknauss · January 2005

I've used Lame before and compared it to various compression algorithms and CDs, and MP3 is definitely the worst when comparing to the same bit rate with other compression schemes. Back in the day, I couldn't hear the difference between MP3 and CD, but that was on crappy computer speakers and my ears weren't nearly as trained back then.

Toxis · January 2005

Originally posted by jarros
Are you sure? I took a quick look at iTunes, and you CAN configure it to rip the tracks to different bitrates (check the preferences). But you're saying that it reconverts the files when it transfers them to the iPod? That seems to be a VERY fast conversion, as each song takes a second or two...

I use MusicMatch so maybe it's that program but there's no where I can change the bitrate. I tried using iTunes but for some reason, it never worked right. Seeing I have a PC, not a mac, the program the disk that came with the iPod gave me MusicMatch. I'm not a huge fan of it but it works...

jarros · January 2005

Originally posted by Toxis
I use MusicMatch so maybe it's that program but there's no where I can change the bitrate. I tried using iTunes but for some reason, it never worked right. Seeing I have a PC, not a mac, the program the disk that came with the iPod gave me MusicMatch. I'm not a huge fan of it but it works...

My brother's using his iPod on a PC and hasn't had any problems with automatic bitrate down-conversions with iTunes. Take another look, it'll be worth it if you can get rid of that MusicMatch spyware...

michael_w · January 2005

Originally posted by Shell
Dumb question, but what is Red book CD? I have seen that several times now.

I seem to recall that a redbook cd is just a normal cd ,(silver back), nothing fancy like hdcd or anything.

xsmi · January 2005

If you can use the Apple Lossless format on the PC that is the way to go (I'm a mac user) It is heads and shoulders above both AAC and mp3. THe files are a little larger (~25%) but what you gain in sound quality, for me, it was worth it.

polkatese · January 2005

thanks, all. well, it looks like there is an option to rip it at CD quality, albeit not MP3:

http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=498512&perpage=20&pagenumber=1

debussyj · February 2005

Hi,

I messed around with the IPod through my system for quite some time. I am an Apple user. I found that I had to do the larger files because the MP3 files sounded like crap. I have the complete LSI 15 speaker system. Although I still have a 40 gig IPod, I abandoned this setup. The RCA input just stunk and there was no other way around it. What I did was load all of my tunes on my Powerbook G-3 and utilize the airtunes gizmo with optical imput. The sound is respectable, and I have the programming options of ITunes which makes things fun. It still pales in comparison to listening to a CD through my Denon DVD 5900 in 7.1, but I do enjoy the convenience of having a good portion of my music library in one place without fumbling through my 800+ CD's.:)

goingganzo · February 2005

they are not bad i rented one from best buy for my trip to china the olny problem i ran into was the sotware locked up my comp under heavy use.

iPod Sound Quality

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