The Traders' Den  

  The Traders' Den > Where we go to learn ..... > Technobabble > Lossy or Lossless?
 

Notices

Lossy or Lossless? Please use this forum to post spectral and frequency analysis posts about shows you have your doubts about.

Reply
 
Thread Tools
  #1  
Old 2004-12-07, 11:34 PM
desert_rat's Avatar
desert_rat desert_rat is offline
1.04 TB/884.44 GB/0.83
 
Join Date: Nov 2004
Is this mp3?

I could use some more opinions on this show. I know this was an original cassette master, which at some generation was put to cd. Does anyone think this has mp3 lineage in it?

Thanks in advance.
Attached Images
File Type: gif freq.GIF
( 23.7 KB, 541 views)
 
File Type: gif spec.GIF
( 83.6 KB, 461 views)
 
__________________
Always looking to trade
http://liveaudiorecordings.com/
Reply With Quote Reply with Nested Quotes
  #2  
Old 2004-12-08, 01:19 AM
dorrcoq's Avatar
dorrcoq dorrcoq is offline
Champion of the Silent
TTD VIP
727.47 GB/6.80 TB/9.57
 
Join Date: Nov 2004
Re: Is this mp3?

looks OK to me, maybe MiniDisc, but not MP3
__________________
DON'T MESSAGE ME FOR RE-SEEDS. I DO NOT DO THEM!
Reply With Quote Reply with Nested Quotes
  #3  
Old 2004-12-08, 02:49 AM
feralicious's Avatar
feralicious feralicious is offline
dare to discover
63.44 GB/133.91 GB/2.11
 
Join Date: Nov 2004
Location: occasionally
Re: Is this mp3?

Doesn't look like mp3 to me either. FM? That black "line" of space in the top area I think indicates something, I think that it's an FM signal, but I could be wrong. Perhaps someone else will know what and if that's true that it even means anything.

On mp3s the freq will drop off at around 16khz. And the spectral view will show a hard line across the top where the sound cuts off, what is called a "haircut". Neither pic indicates these.
__________________
feralicious goodies
Don't get even.
Get odd.

....
Reply With Quote Reply with Nested Quotes
  #4  
Old 2004-12-08, 03:25 AM
Karst's Avatar
Karst Karst is offline
Utterly Bastard Groovy
75.55 GB/92.04 GB/1.22
 
Join Date: Nov 2004
Location: Belfast
Re: Is this mp3?

What show is that (Dublin?). I agree with Nina looks more like a FM.
Reply With Quote Reply with Nested Quotes
  #5  
Old 2004-12-08, 05:41 AM
elguiri's Avatar
elguiri elguiri is offline
1.74 GB/444.31 MB/0.25
 
Join Date: Dec 2004
Re: Is this mp3?

Doesnt FM radio normally show a spike at around 19khz? , might the missing black band 16-18khz be some sort of noise reduction ?
Reply With Quote Reply with Nested Quotes
  #6  
Old 2004-12-08, 07:25 AM
RainDawg's Avatar
RainDawg RainDawg is offline
Renegade Geek
10.20 GB/20.72 GB/2.03
 
Join Date: Oct 2004
Location: Passing swiftly through The Moor
Re: Is this mp3?

This is absolutely NOT mp3 by any means. Might not be FM, cass has similar fading of the upper end. I think that what I'm looking is perfectly normal for a Cass(x) > CDR, with no foul play suspected on my part.
__________________
Through the clouds,
Throught the lies,
We'll never see,
What's never been,
At the ending of life and the coming of death,
Pass not through its gates but into the dark.
Reply With Quote Reply with Nested Quotes
  #7  
Old 2004-12-08, 08:30 AM
desert_rat's Avatar
desert_rat desert_rat is offline
1.04 TB/884.44 GB/0.83
 
Join Date: Nov 2004
Re: Is this mp3?

Okay thanks everyone, this is a audience recording, not a great one by any means. At any rate, just wanted to get some second and third opinions.
__________________
Always looking to trade
http://liveaudiorecordings.com/
Reply With Quote Reply with Nested Quotes
  #8  
Old 2004-12-08, 05:40 PM
New Homebrew
0.00 KB/0.00 KB/---
 
Re: Is this mp3?

The straight, level blackness above 16kHz sure raises my suspicions.
Reply With Quote Reply with Nested Quotes
  #9  
Old 2004-12-08, 06:08 PM
wazoo2u wazoo2u is offline
923.61 MB/96.22 MB/0.10
 
Join Date: Nov 2004
Re: Is this mp3?

There's a 20db falloff at around 10k that doesn't look like the gradual freqency deterioration that you get from magnetic tape generations.

FM falloff is at the 15k carrier, so that's not it. If anything, it LOOKS like a normal analog gen that went through a REALLY FUBARED generation somewhere along the line. Doesn't look like great sounding audio, but certainly doesn't look like a "lossy encoded" product.
Reply With Quote Reply with Nested Quotes
  #10  
Old 2004-12-08, 06:11 PM
Five's Avatar
Five Five is offline
189.30 GB/594.78 GB/3.14
 
Join Date: Oct 2004
Location: Canada
Re: Is this mp3?

I don't know what this is but is sure isn't mp3. I would love to check 2-second sample of this just for curiosity, either posted here as FLAC in a .zip or pm me for me my email.
__________________
Checksums Demystified | ask for help in Technobabble

thetradersden.org | ttd recommended free software/freeware webring
shntool tlh eac foobar2000 spek audacity cdwave vlc

Quote:
Originally posted by oxymoron
Here you are in a place of permanent madness, be careful!
Reply With Quote Reply with Nested Quotes
  #11  
Old 2004-12-08, 08:21 PM
desert_rat's Avatar
desert_rat desert_rat is offline
1.04 TB/884.44 GB/0.83
 
Join Date: Nov 2004
Re: Is this mp3?

Here's a 4 second sample of one of the songs.

Well stand by, the attachment pop up window doesn't like the .flac extension
__________________
Always looking to trade
http://liveaudiorecordings.com/
Reply With Quote Reply with Nested Quotes
  #12  
Old 2004-12-08, 08:34 PM
desert_rat's Avatar
desert_rat desert_rat is offline
1.04 TB/884.44 GB/0.83
 
Join Date: Nov 2004
Re: Is this mp3?

Well I can't get the 2 second sample below the 97kb limitation. I'll send you a pm.
__________________
Always looking to trade
http://liveaudiorecordings.com/
Reply With Quote Reply with Nested Quotes
  #13  
Old 2004-12-09, 12:02 AM
Five's Avatar
Five Five is offline
189.30 GB/594.78 GB/3.14
 
Join Date: Oct 2004
Location: Canada
Re: Is this mp3?

OK, I got the sample and looked at it in CEP... This looks and sounds like 128kb/s cbr mp3. The classic indications are there: the fa drops off right at 16kHz, the sa shows a perfect straight cutoff at 16kHz with pure black above, and you can see some blocky black bits within the audio.
Attached Images
File Type: gif dr_fa.gif
( 19.7 KB, 242 views)
 
File Type: gif dr_sa.gif
( 286.6 KB, 265 views)
 
__________________
Checksums Demystified | ask for help in Technobabble

thetradersden.org | ttd recommended free software/freeware webring
shntool tlh eac foobar2000 spek audacity cdwave vlc

Quote:
Originally posted by oxymoron
Here you are in a place of permanent madness, be careful!
Reply With Quote Reply with Nested Quotes
  #14  
Old 2004-12-09, 01:05 AM
dorrcoq's Avatar
dorrcoq dorrcoq is offline
Champion of the Silent
TTD VIP
727.47 GB/6.80 TB/9.57
 
Join Date: Nov 2004
Re: Is this mp3?

well, that frequency analysis is a lot different than what he originally posted
__________________
DON'T MESSAGE ME FOR RE-SEEDS. I DO NOT DO THEM!
Reply With Quote Reply with Nested Quotes
  #15  
Old 2004-12-09, 01:16 AM
feralicious's Avatar
feralicious feralicious is offline
dare to discover
63.44 GB/133.91 GB/2.11
 
Join Date: Nov 2004
Location: occasionally
Re: Is this mp3?

That's for sure. desert_rat are you sure you sent him the clips from the same tracks you got your fa and sa from? I don't see how those can be from the same track.
__________________
feralicious goodies
Don't get even.
Get odd.

....
Reply With Quote Reply with Nested Quotes
Reply

The Traders' Den > Where we go to learn ..... > Technobabble > Lossy or Lossless?


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forums


All times are GMT -5. The time now is 09:52 AM.


Powered by: vBulletin, Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004 - , TheTradersDen.org - All Rights Reserved - Hosted at QuickPacket