IPB

Welcome Guest ( Log In | Register )

Are there any notoriously bad Ogg Vorbis encoders?, I think Spotify might be using one of them...
mmontag
post Aug 1 2011, 08:18
Post #1





Group: Members
Posts: 2
Joined: 31-July 11
Member No.: 92669



I am wondering because I have noticed a particular disturbing artifact on many Spotify tracks. What could cause this? I'd like to reproduce this sound in order to back up my suspicions. I can't seem to reproduce the noise no matter how low quality I compress my test audio, so my first guess was that Spotify could have used a bad encoder, earlier version, etc. Much like some early MP3 encoders, such as Xing, were notorious for producing poor quality MP3s.

I have some samples available on my blog:

http://www.mattmontag.com/music/weird-spot...ssion-artifacts

Matt

This post has been edited by mmontag: Aug 1 2011, 08:19
Go to the top of the page
+Quote Post
 
Start new topic
Replies
mixminus1
post Aug 1 2011, 21:50
Post #2





Group: Members
Posts: 684
Joined: 23-February 05
Member No.: 20097



According to the spotifyclassical.com blog post linked on the OP's website, the stream is encrypted, so that could be tricky...I'm "assuming" that the WAVs Matt provided on his website were captures of the actual playback, either by sound card loop-back, or by grabbing the decompressed PCM stream via something like Total Recorder.

Matt, how did you create those WAV samples?

On a whim, I did some searching on Amazon, and it just so happens that all the tracks that Matt posted come from Universal Music Group labels...after what was discovered in my previously-linked thread, I'm going to double-down on watermarking, particularly since Matt says that the artifacts are still there on the 320 kbps stream.

Edit: added the last bit about the 320 kb stream

This post has been edited by mixminus1: Aug 1 2011, 21:59


--------------------
"Not sure what the question is, but the answer is probably no."
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 19th April 2014 - 11:51