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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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Old 2011-02-08, 08:08 PM
zootype zootype is offline
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Re: Spotting Lossy Sources--links inside

Originally Posted by zootype View Post
Re: Spotting Lossy Sources--links inside


Originally Posted by pissah
Hello! has anybody had trouble with Trader's Little Helper's tool for checking for lossy files?
I have taped a few things straight to WAV, then after a bit of tweaking and EQing I often get a "source cannot be specified" or even "looks like MP3"
I KNOW there was no mp3 in the lineage so what's up with that??

So what exactly can this thread tell us about determining whether or not an upload would be acceptable here, re: lossy or lossless?
Not much, apparently.
OK I'll try to be less cranky and figure out this here spectrum anal thing
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Old 2014-01-15, 06:58 AM
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jpeace jpeace is offline
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Re: Spotting Lossy Sources--links inside

AS mentioned in another thread, it is possible to fool all of you by using harmonic synthesis to restore the missing high end. I've tried this, showed it to one of my MQR labelmates who is skilled at reading spectrals, and he couldn't tell the difference. Neither could TLH (CDDA 100%). Add tape noise like the Zappateers do? Amateurs. Just restore the high end with harmonic synthesis and no one will be the wiser.

This is all hypothetical. I'd never do that and circulate it. Just making a point that there's no foolproof way to tell the difference.
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Old 2014-03-05, 03:39 PM
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ssamadhi97 ssamadhi97 is offline
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Re: Spotting Lossy Sources--links inside

Another neat program for spectral analysis is Sonic Visualiser.

It's free and open source.

With some tweaking its built-in spectrogram functionality is almost as good as that of CoolEdit Pro / Audition, even though it is not quite as customizable (color presets not editable, no dynamic range adjustment, no gamma adjustment)

The program is extensible through plugins, though I haven't tested any of those. Yet. <insert maniacal laughter here>

I've attached a Session Template to this post with settings I find to be suitable for source analysis. Extract it to %userprofile%\.Sonic Visualiser\templates and load it via File->Apply Session Template->Waveform and per-channel Spectrograms
Attached Images
File Type: png Sonic Visualiser.png
( 382.2 KB, 11 views)
Attached Files
File Type: zip Waveform and per-channel
( 886 Bytes, 11 views)
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The Traders' Den > Where we go to learn ..... > Technobabble > Lossy or Lossless?

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