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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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  #31  
Old 2007-09-05, 10:53 PM
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Re: Modern Day FMs

^lossy *sighs*

The Bruce Springsteen Special (FM 1987)
-this one I would blame the lack of frequency response on taping equipment and media (TDK D90). The carrier isn't even there, and it wasn't removed (I did the transfer)
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File Type: gif springsteenspecial_2.gif
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File Type: gif springsteenspecial_3.gif
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  #32  
Old 2007-09-05, 11:06 PM
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Re: Modern Day FMs

Billy Joel 1978-03-05 (from 2005 rebroadcast) ... lossy, a little different from the others
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  #33  
Old 2007-09-06, 12:11 AM
GIGFY26 GIGFY26 is offline
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Re: Modern Day FMs

Damn I've learned a lot.
Thanks for this info. I was always more impressed by FM than I should have been. Audio has never been my specialty obviously, but I would guess you guys nailed it with the storage issue. I actually wouldn't be surprised if the library for a local station were stored on a shared server within the network and pulled across as needed. You could almost run a local station with a transmitter and a computer. It seems like accountants run everything now and "good enough" is a company motto.
Learned a ton. Thanks
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  #34  
Old 2007-09-06, 12:29 AM
GIGFY26 GIGFY26 is offline
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Re: Modern Day FMs

What do you guys see in this one?

INXS 1997 04 24 FM show that was uploaded recently on Dime.

No harsh drop on the FA and no straight cutoff in the SA. Based on your comments five, can I assume the SA straight line at 16khz is the subcarrier? No audio above the cutoff but nothing abrupt in either analysis either. Could this be just analog compressed to fit the bandwidth?
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  #35  
Old 2007-09-06, 12:40 AM
GIGFY26 GIGFY26 is offline
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Re: Modern Day FMs

I'll try the attachment again
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  #36  
Old 2007-09-06, 12:42 AM
GIGFY26 GIGFY26 is offline
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Re: Modern Day FMs

Sorry about the size on that one. My first attachment here. I'll scale it down in the future.
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  #37  
Old 2007-09-06, 12:21 PM
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Re: Modern Day FMs

EAC isn't the best, really... see how the FA doesn't even show the drop plainly visible in the SA (you could try upping the fft size fwiw). also see here.

I'm pretty sure that's not the carrier at 16kHz, seems to me its some other noise. what's the lineage on that? can you post a short track to rapidshare? I'm wondering when the stations started switching over, and I haven't got anything from the late 90s on hand.

the cutoff visible in the SA looks normal for radio, of course.
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  #38  
Old 2007-09-06, 03:35 PM
procella procella is offline
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Re: Modern Day FMs

I dl'ed one track of this INXS show and here are 2sec SA and FA. Guess it's lossy but better you explain that, five.
Wanted to up them sooner but I had a car crash. Nothing big and my car just got hit but a lot of trouble.
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File Type: gif inxs sa2.gif
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  #39  
Old 2007-09-06, 03:45 PM
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Re: Modern Day FMs

nah, I don't think that one's lossy from what I can see there... very strange that red stripe being where it is what city/station is that?
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  #40  
Old 2007-09-06, 04:02 PM
procella procella is offline
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Re: Modern Day FMs

Torrent info:

Mayan Theatre,
Los Angeles, California - April 24, 1997.

Source: FM Broadcast.
Lineage: Traded cd > EAC > .Wav > Flac Frontend (Level 7).
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  #41  
Old 2007-09-06, 05:16 PM
procella procella is offline
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Re: Modern Day FMs

What's this? The first 2 seconds of the song.
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Last edited by procella; 2007-09-06 at 05:22 PM.
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  #42  
Old 2007-09-06, 05:27 PM
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Re: Modern Day FMs

What happened? Had no intention to put this pic into the thread. Thought I just uploaded like the others before.
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  #43  
Old 2007-09-06, 07:32 PM
procella procella is offline
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Re: Modern Day FMs

Thanks for all these examples, Five. Those from the 80s show the difference in the cutoff real nicely.

Is there a way to see the difference between a NICAM - and a mp3 cutoff?
The BBC still seems to keep some quality. But NICAM is lossy also. So good, but could still be better. I am not in Britain but I'm in Europe, in the center of it. Not sure how FM quality is here now but I will check some I downloaded and see if I find interesting ones. I know that Spanish stations lower the quality of live broadcasts sometimes. One I got cuts off at 8 Khz. But doesn't seem to be lossy. And it was announced as a low quality broadcast.
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  #44  
Old 2007-09-06, 08:37 PM
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Re: Modern Day FMs

The Hour 25 shows may not be the best example to use.

The sound was doctored in playback, because I was looking to get the optimum reproduction and on some of those shows, playback was in mono, by either using a mono only deck or by folding the stereo channels into a single monaural source. And in some instances, I ran the signal through a 25 year old equalizer. (And I have no longer have any idea which Hour 25 shows were transferred in mono or stereo.)

Especially since I couldn't discern any stereo seperation in the interview portions of those broadcasts, the many of the original stereo cassettes were transferred to cdr in mono.
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  #45  
Old 2007-09-07, 08:50 PM
GIGFY26 GIGFY26 is offline
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Re: Modern Day FMs

Quote:
Originally Posted by Five
EAC isn't the best, really... see how the FA doesn't even show the drop plainly visible in the SA (you could try upping the fft size fwiw). also see here.

I'm pretty sure that's not the carrier at 16kHz, seems to me its some other noise. what's the lineage on that? can you post a short track to rapidshare? I'm wondering when the stations started switching over, and I haven't got anything from the late 90s on hand.

the cutoff visible in the SA looks normal for radio, of course.
Sorry I haven't checked in. I'll try to get it post on rapidshare soon. I've never used it and I'm getting a little slammed right now.

The INXS show was from Dime
Lineage from info file:
Mayan Theatre,
Los Angeles, California - April 24, 1997.

Source: FM Broadcast.
Lineage: Traded cd > EAC > .Wav > Flac Frontend (Level 7).

Thanks for helping me learn this stuff.
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