Login / Register
 
Have you guys noticed compression on itunes/ipod?
New Reply
Subscribe
TwardyLikeTank
Thread Starter
#1
10th April 2010
Old 10th April 2010
  #1
Gear maniac
 
Joined: Jan 2010
Posts: 211

Thread Starter
TwardyLikeTank is offline
Have you guys noticed compression on itunes/ipod?

Heya, how's it going?

There's a lecturer at school who reckons he can hear compression added to tracks playing from itunes or from an ipod even when the mysterious "sound enhancement" is switched off.

Opinions?

(This is close to a "do different DAW's" null or not, but I swear it isn't.)
#2
10th April 2010
Old 10th April 2010
  #2
Gear nut
 
Joined: Feb 2010
Posts: 77

wefandango is offline
Did he specify what he meant by 'compression?' Because I definitely hear lossy data compression...
#3
10th April 2010
Old 10th April 2010
  #3
Lives for gear
 
DistortingJack's Avatar
 
Joined: Aug 2009
Location: London/Paris
Posts: 729

DistortingJack is offline
I hear a graininess coming from iTunes compared to other apps (notably iZotope RX) which I attribute either to complete delusion or something to do with a lo-pass filter, but the feeling of compression from an ipod just comes from a shitty headphone amp, really ; )
#4
10th April 2010
Old 10th April 2010
  #4
Lives for gear
 
Realziment's Avatar
 
Joined: Jan 2009
Location: Los Angeles / Dublin
Posts: 2,205

Realziment is offline
are saying as opposed to other mp3 format sites, or as opposed to cd?
#5
10th April 2010
Old 10th April 2010
  #5
Gear interested
 
Joined: Apr 2010
Location: Burbank, CA USA

Joseph Schwartz is offline
I have A/B'd AIFF, AAC, 320k MP3, and 128k MP3 of the same songs in a control room and heard subtle differences among them.

Individually nulling out the left and right channels of AIFF and the other files produces substantial difference signals, i.e. compression artifacts.
TwardyLikeTank
Thread Starter
#6
11th April 2010
Old 11th April 2010
  #6
Gear maniac
 
Joined: Jan 2010
Posts: 211

Thread Starter
TwardyLikeTank is offline
Cheers dudes-of-sound, interesting replies.

He was talking about comparing the same file played in ProTools to the same file played in itunes.
#7
11th April 2010
Old 11th April 2010
  #7
Lives for gear
 
valis's Avatar
 
Joined: Apr 2006
Location: Northwest USA
Posts: 4,597

valis is offline
In what format though? Broadcast wav/aiff playback in both? Listening to the same mp3 or mp4/aac through both platforms? (which I don't think Protools can do btw without decoding the audio...)
TwardyLikeTank
Thread Starter
#8
12th April 2010
Old 12th April 2010
  #8
Gear maniac
 
Joined: Jan 2010
Posts: 211

Thread Starter
TwardyLikeTank is offline
Ohhh.... I don't know. What mysterious processes could be involved in different formats?
#9
12th April 2010
Old 12th April 2010
  #9
Lives for gear
 
valis's Avatar
 
Joined: Apr 2006
Location: Northwest USA
Posts: 4,597

valis is offline
Well comparing 48khz/24bit (or 44.khz/24bit etc) to 128-192k AAC (itunes compressed) is certainly going to show differences...
New Reply Submit Thread to Facebook Facebook  Submit Thread to Twitter Twitter  Submit Thread to LinkedIn LinkedIn  Submit Thread to Google+ Google+ 
 
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Similar Threads
Thread
Thread Starter / Forum
Replies
Pfraser / So much gear, so little time!
7
bchamorro / So much gear, so little time!
1
jindrich / So much gear, so little time!
157

Forum Jump

SEO by vBSEO ©2011, Crawlability, Inc.