iPhone 4 audio codec chip
http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/3
Cirrus Logic 338S0589 audio codec (Apple branded). This is the same part as in the iPad.

iPhone 4s audio codec chip
http://www.ifixit.com/Teardown/iPhone-4S-Teardown/6610/2*Step 10
Apple 338S0987 B0FL1129 SGP, believed by Chipworks to be a Cirrus Logic audio codec chip

Older gen
http://www.ifixit.com/Browse/iPhone

iPod Touch 4 audio codec chip
http://www.ifixit.com/Teardown/iPod-Touch-...Teardown/3562/3*Step 21
On the far left is a 338S0859 chip. It's similar to the Cirrus Logic audio codec of the iPhone 4 (338S0589).

Older gen and other model
http://www.ifixit.com/Browse/iPod

iPad
http://www.ifixit.com/Browse/iPad

This post has been edited by wkkm007: Nov 15 2011, 02:33 PM

means,which one better?

Good question I also would like to ask
Anyone have iPhone 4s?
Let see Apple whether they upgrade the chip?

This post has been edited by wkkm007: Nov 12 2011, 11:40 AM

As i know my iphone 4 sound output is not really that satisfying
Im using ajays four and compare with i plug into laptop. Iphone clearly lose much

Compared Iphone 4 with Ipod Classic 5th gen, clearly iphone really sounds like HTC phones. @@

for me the best iphone for audio would be 3gs. iphone 4 out from 3.5mm jack sound a bit digital.... cold and flat....

but should be another story if u pair up with fostex HP - P1 or CLAS

Wow, you guys really stump me.

My iPod touch 4 sounds just great. Hmm... Only I wish I got the one with more capacity, oh well..

The older iPods with wolfsen chip sounds more analog to me

+1

saw in some chinese forum, IPT4 has better sound than IP4.

IPT4 sounds better than IP4. Well, anything works well if your rigs are superb.

Yeap, that's the reason i downgrade from Ipod Nano 6th gen to Ipod Classic 5th gen.

This mean I make a right choice to IPT4

They use the same chip.. But I've never really heard an ip4 so..

at least you dont need to bother about battery life

also iphone first gen and 3g.
IPT 1st and 2nd gen are wolfson too if im not mistaken

out of the headphone out, itouch/iphone 4 is still the best sounding idevice

Totally agreed. My iPod touch 4 sounds great. Only problem is driving monsters but I dun have any, haha!

Actually I feel that IPT4 sounds better with AAC than MP3 considering both format having the same bit rate when I ripped the same song from CD.

That's normal.

The fact: AAC is a superior and MP3 is pretty much obsolete. Anything current should sound better than MP3 at the same bitrate.

AAC 128 kpbs VBR sounds the same as ALAC or CD to me. I'm sure many would disagree but I'm just stating what I hear.

Disclaimer: That was about a year or 2 back when I tested, with a Shure SE110. I need to re-test again to make sure since the SE110 is not very transparent..

This post has been edited by polkiuj: Nov 19 2011, 10:58 PM