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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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  #16  
Old 2005-12-22, 08:12 AM
*dJ* *dJ* is offline
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Re: mm lossy?

Ok thanks (again!), but are those types of digital transfers considered lossy..ok (this type) md is already lossy, but let's say is it allowed to share such a show here?
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  #17  
Old 2005-12-22, 09:55 AM
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Re: mm lossy?

yes, it is okay to share minisisc recordings here and also at similar sites so long as it was taped originally to minidisc (as is the case here).

if it was, for example, taped to dat then copied to minidisc then to wav to flac that would be not okay if you see what I'm saying.
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  #18  
Old 2006-01-06, 11:26 AM
*dJ* *dJ* is offline
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Re: mm lossy?

It's me again with another question..




I was wondering if it's mono (upto 14-16 kHz both channels look the same..) and also if it's upsampled around 15 kHz it seems slightly mirrored.

Linage i have is CDR>EAC>WAV (I think the cdr is max 3 generation).

Sample[s] on request
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  #19  
Old 2006-01-06, 02:50 PM
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Re: mm lossy?

go to analyze > show phase analysis

set it to mid/side and you can use the "normalize" button to make it easier to see (in this case normalize is just for display).

for mono you will see a little skinny line up the centre that bounces with the sound:


for stereo, you will see something like a ball of string bouncing all over the place eg:


easier to understand when you see it in motion. the phase analysis shows differences between the channels, so if its a perfectly thin line up the middle its mono.
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  #20  
Old 2006-01-06, 03:35 PM
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Re: mm lossy?

This is what I got (hope i picked a good number of samples):



.. so this is stereo? if show how can it be the FA of both channels (the two different colours in the FA are the channels -- right?) or so similair, especially upto 14-16 kHz?
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  #21  
Old 2006-01-08, 01:35 PM
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Re: mm lossy?

that is stereo

the image isn't all that wide compared to some shows which means that the L and R channels are almost the same, but not exactly the same.
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  #22  
Old 2006-02-07, 01:51 PM
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Re: mm lossy?

Was wondering about this one, especially because it's know to be circulating in mp3. It can (therefore) be some tracks are ok and some not..

Track 01
FA: http://img146.imageshack.us/my.php?i...rack1fa3gi.png
SA: http://img66.imageshack.us/my.php?im...rack1sa4vi.png

Track 12
FA: http://img141.imageshack.us/my.php?i...ack12fa5fd.png
SA: http://img149.imageshack.us/my.php?i...ack12sa4py.png

Track 18
FA: http://img91.imageshack.us/my.php?im...ack18fa3uc.png
SA: http://img91.imageshack.us/my.php?im...ack18sa9mi.png

The given lineage:
THIS IS AN EXCELLANT QUALITY DEMO TAPE THAT I RECEIVED IN A TRADE
FROM CD - FLAC

..which seems strange on his own. Got a tape and conversion says cd>flac

-----

Also got another show, which claims to be FM sourced:

Track 03
FA: http://img92.imageshack.us/my..image...ufatr033jn.png
SA: http://img261.imageshack.us/m..image...usatr039ia.png

Track 11
FA: http://img145.imageshack.us/my.php?i...esulufa3xu.png
SA: http://img145.imageshack.us/my.php?i...esulusa4lq.png

I was wondering how can it be the carrier is 16 kHz? How can it be the drop at track 3 is reanoable (?) bigger comparing with track 11?
Track 03 seems to miss some blocks in ther carrier?

As usual any help is appreciated!!
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  #23  
Old 2006-02-07, 02:36 PM
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Re: mm lossy?

Quote:
Originally Posted by *dJ*
Was wondering about this one, especially because it's know to be circulating in mp3. It can (therefore) be some tracks are ok and some not..

Track 01
FA: http://img146.imageshack.us/my.php?i...rack1fa3gi.png
SA: http://img66.imageshack.us/my.php?im...rack1sa4vi.png

Track 12
FA: http://img141.imageshack.us/my.php?i...ack12fa5fd.png
SA: http://img149.imageshack.us/my.php?i...ack12sa4py.png

Track 18
FA: http://img91.imageshack.us/my.php?im...ack18fa3uc.png
SA: http://img91.imageshack.us/my.php?im...ack18sa9mi.png

The given lineage:
THIS IS AN EXCELLANT QUALITY DEMO TAPE THAT I RECEIVED IN A TRADE
FROM CD - FLAC

..which seems strange on his own. Got a tape and conversion says cd>flac
All of these look mp3 sourced -typical blocking and lowpassing, though the encoder picked a pretty high lowpass on some of the tracks (probably Blade at fairly high bitrate, which is iirc known to do that. It's also known to suck. :P)

Quote:
Originally Posted by *dJ*
Also got another show, which claims to be FM sourced:

Track 03
FA: http://img92.imageshack.us/my.php?im...ufatr033jn.png
SA: http://img261.imageshack.us/my.php?i...usatr039ia.png

Track 11
FA: http://img145.imageshack.us/my.php?i...esulufa3xu.png
SA: http://img145.imageshack.us/my.php?i...esulusa4lq.png

I was wondering how can it be the carrier is 16 kHz? How can it be the drop at track 3 is reanoable (?) bigger comparing with track 11?
Track 03 seems to miss some blocks in ther carrier?

As usual any help is appreciated!!
This source exhibits typical signs of an analog tv recording - the audio bandwidth, the structure of the noise floor in the treble range (especially in the left channel), and especially the "tone" which apparently is at the line frequency of NTSC (~15750 Hz) or PAL (~15625 Hz), just below 16kHz - no, that's not a "carrier" signal of any kind.
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  #24  
Old 2006-02-07, 02:37 PM
*dJ* *dJ* is offline
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Re: mm lossy?

About last show:

I know there exists a digital broadcast from BBC's interactive feed, can this be an audio rip of that one?

Although I remember some talking by a presentator (going to re-check)

Last edited by *dJ*; 2006-02-07 at 02:44 PM.
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  #25  
Old 2006-02-07, 03:07 PM
*dJ* *dJ* is offline
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Re: mm lossy?

I am puzzled:

The intro says: This is Lamac live [..] Recorded exclusively for Radio One last thursday, live in london this are the Strokes.

As I said can this be from an interactive (web/online) feed?
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