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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 2005-08-13, 12:08 AM
Dylz Dylz is offline
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Lossy? Strange line/peak at 19Khz

Hey,
I was just checking some shows for a trade before I copy them and I checked one show that contains a strange phenomena.

The frequency analysis shows a random, strong peak at 19KHZ
The spectral view shows a strong line at that same frequency.

www.swis.net.au/~bendil.dsl/offspring95fa.gif
www.swis.net.au/~bendil.dsl/offspring95sa.jpg

I've seen this before but can someone tell me what this weird line indicates? Where does it come from?

Im assuming it's mp3 or lossy of some description.

thanks

-Dylz
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  #2  
Old 2005-08-13, 12:27 AM
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U2Lynne U2Lynne is offline
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Re: Lossy? Strange line/peak at 19Khz

I believe that is from an FM source. Someone else will come confirm or tell me I am sooo wrong!
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  #3  
Old 2005-08-13, 01:31 AM
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paddington paddington is offline
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Re: Lossy? Strange line/peak at 19Khz

Positively, US FM Analog Radio (not IBOC). The stereo pilot is at 19.0kHz.
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  #4  
Old 2005-08-13, 01:32 AM
Dylz Dylz is offline
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Re: Lossy? Strange line/peak at 19Khz

thanks, can anyone confirm this?
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  #5  
Old 2005-08-13, 01:40 AM
Dylz Dylz is offline
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Re: Lossy? Strange line/peak at 19Khz

cool thanks!
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  #6  
Old 2005-08-13, 02:07 AM
Dylz Dylz is offline
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Re: Lossy? Strange line/peak at 19Khz

a slightly similar case... i can't work out if this is lossy
it's an audience recording

FREQ ANALYSIS
www.swis.net.au/~bendil.dsl/catempirefa.jpg

SPECTRAL
www.swis.net.au/~bendil.dsl/catempiresa.gif

SPECTRAL 2 second zoom
www.swis.net.au/~bendil.dsl/catempiresa2.gif
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  #7  
Old 2005-08-13, 07:02 AM
spontabmark
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Re: Lossy? Strange line/peak at 19Khz

could be minidisc lp4
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  #8  
Old 2005-08-13, 09:18 AM
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ssamadhi97 ssamadhi97 is offline
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Re: Lossy? Strange line/peak at 19Khz

I'd have to agree, I think mdlp is the only (common) codec that shoots such holes into the spectrum.

(omg Cat Empire? saw these guys in concert last month, they rocked my socks off)
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  #9  
Old 2005-08-13, 09:38 AM
Dylz Dylz is offline
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Re: Lossy? Strange line/peak at 19Khz

Cool! Thanks. It's gonan take a while for me to identify the diff between MD and MP3. arg!

Cat Empire are cool!
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