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

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  #1  
Old 2005-10-05, 05:17 PM
alchemy71085
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FM compression or .mp3 ?

I'm usually pretty good at spotting .mp3 sourced material, even in the rare case when it doesn't stick out like a sore thumb, but I always love second opinions. The attached is from FM, but what do you think?
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File Type: jpg freq.JPG
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File Type: jpg spectral.JPG
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  #2  
Old 2005-10-05, 05:39 PM
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Re: FM compression or .mp3 ?

looks like fm to me

would love to see a spectral zoomed to 2 seconds if possible
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  #3  
Old 2005-10-05, 06:44 PM
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Re: FM compression or .mp3 ?

Spike at 17 KHz ? Halfway between TV and FM ? There's a spikelet at 15.5 KHz so I'm going for a TV source.
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  #4  
Old 2005-10-05, 07:01 PM
alchemy71085
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Re: FM compression or .mp3 ?

OK, thank you, but the disks have FM intros and outros so I know it's FM.

I'm just trying to make sure it's not .mp3 sourced, because I need it for an upcoming project.

The recording is Dire Straits - live in Houston from August 17th, 1985.

Although, who knows, could be one of those TV simulcasts without video, but I don't think so.

Quote:
Originally Posted by ffooky
Spike at 17 KHz ? Halfway between TV and FM ? There's a spikelet at 15.5 KHz so I'm going for a TV source.
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  #5  
Old 2005-10-05, 07:33 PM
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Re: FM compression or .mp3 ?

the problem with ALOT of US radio stations today is that they take live programs that are sent to them on disc for broadcast then load them in their machines as Mp3's and broadcast them that way, could be an Mp3 source that was broadcast over the airwaves...
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  #6  
Old 2005-10-05, 07:41 PM
alchemy71085
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Re: FM compression or .mp3 ?

Yes, I know, but not from 1985.
Unless there is something I should know about

To be honest, I wish there were more live concert broadcasts. It seems that they are thing of the past these days.

Come to think of it, I haven't heard any in a long time.

Quote:
Originally Posted by jcrab66
the problem with ALOT of US radio stations today is that they take live programs that are sent to them on disc for broadcast then load them in their machines as Mp3's and broadcast them that way, could be an Mp3 source that was broadcast over the airwaves...
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  #7  
Old 2005-10-05, 07:48 PM
alchemy71085
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Re: FM compression or .mp3 ?

Here is the screenshot you needed Five. Hope I did that correctly.

The show is from a radio station out of Canada(?) called "SHAY 106", but considering it was broadcast in 1986, I doubt it still exists. The show was called "Saturday's at Seven".

Thanks.


Quote:
Originally Posted by Five
looks like fm to me

would love to see a spectral zoomed to 2 seconds if possible
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  #8  
Old 2005-10-06, 12:35 PM
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Re: FM compression or .mp3 ?

hmm... pretty fuzzy

can you get me a sample of this? 5-10 seconds, post a flac to rapidshare.de? I'd be interested to have a closer look. still looks like fm from what I can see.
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  #9  
Old 2005-10-06, 02:57 PM
alchemy71085
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Re: FM compression or .mp3 ?

A fifteen second sample from Sultans of Swing can be found here.

Thanks.


Quote:
Originally Posted by Five
hmm... pretty fuzzy

can you get me a sample of this? 5-10 seconds, post a flac to rapidshare.de? I'd be interested to have a closer look. still looks like fm from what I can see.
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  #10  
Old 2005-10-06, 03:22 PM
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Re: FM compression or .mp3 ?

100% certifiably, absolutely, positively lossless.
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  #11  
Old 2005-10-06, 03:55 PM
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Re: FM compression or .mp3 ?

the sample doesn't resemble the screenshots posted above

very low levels, tons of noise... can't see the carrier

anyhow it looks & sounds lossless to me

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  #12  
Old 2005-10-06, 05:33 PM
alchemy71085
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Re: FM compression or .mp3 ?

The sample was from Sultans of Swing.
The freq analysis and spectral views above are from a differnet song on the same recording.

I didn't think it mattered as it's all from the same source.

Well yea, I agree, the levels are very low. But I didn't do the mastering on this one.

Quote:
Originally Posted by Five
the sample doesn't resemble the screenshots posted above

very low levels, tons of noise... can't see the carrier

anyhow it looks & sounds lossless to me

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  #13  
Old 2005-10-07, 06:45 AM
ffooky ffooky is offline
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Re: FM compression or .mp3 ?

Is this track noticeably hissier than the one you posted csrrenshots of at first ?
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  #14  
Old 2005-10-07, 12:18 PM
alchemy71085
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Re: FM compression or .mp3 ?

No, they all have equal hiss levels, from what I've seen and heard.


Quote:
Originally Posted by ffooky
Is this track noticeably hissier than the one you posted csrrenshots of at first ?
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  #15  
Old 2005-10-07, 02:31 PM
ffooky ffooky is offline
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Re: FM compression or .mp3 ?

Quote:
Originally Posted by alchemy71085
No, they all have equal hiss levels, from what I've seen and heard.
That makes the difference between the screenshots one and the sample even wierder. Any chance of a sample of the first track ?
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