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Spotting Lossy Sources--links inside **2020 UPDATES**
Updated 2020-03-16
Hey all now we've got a forum dedicated to "questionable" sources (i.e. lossy/lossless). I moved all the previous threads on the topic in here. I'm gonna stick this old thread at the top because it has the links to software. I'll come up with something a little cleaner in the next while. -Five --------- 1st off, EAC is not always reliable for spotting lossy sources, based on discussion in this thread: http://www.thetradersden.org/forums/...ead.php?t=1331 best free SA soft: http://spek.cc/ best free FA soft: http://www.thetradersden.org/forums/...d.php?t=157853 The freeware program AnalFreq works well, but is difficult to find these days. [some supporting evidence but overall not very useful for spotting mp3. audacity also works well. still runs on win10 in 2020, link updated -Five 2020] Code:
856aaf2edbf4b558c98d9f0e4a0e3c8f *afreq18.zip 4ba7897a89c00c77fb5bf343ce644bb0 *AnalFreq.exe 0128eb119dc595a393460fbceba71540 *FFT.DLL e13fca2618fe5a1fa5268b4a2aae576c *readme.txt 9de840be66582ad2293fd48f19a7b20f *UserManual.rtf afreq18.zip 28-Aug-2000 09:24 59K original AnalFreq homepage, no archive available! too bad http://www.simtel.net/product.downlo...s.php?id=17151 tell all your spouse that you are an AnalFreq 1.8 user! most unfortunately named software of all time! The best tool is Adobe Audition/Cool Edit Pro. If you just want the SA functionality, download the old Cool Edit Pro 2.1, the Frequency Analysis and Spectral Analysis will still work even after the demo version expires (thanks to dorrcoq for this tip): It is useful to add a "Black & White" preset for spectral analysis, to do this: Quote:
Cool Edit Pro 2.0: http://www.softpedia.com/progDownloa...load-2076.html Audacity is excellent for FA and pretty good for SA: http://audacity.sourceforge.net/ to use Audacity for FA, decompress to WAV, open the file with Audacity, select up to 23 seconds and go to view > plot spectrum. They say spectrum, but it's a Frequency Analysis you get. update: Audacity 1.3.10 (Beta) supports FLAC files with no need to decompress to wav first. to use Audacity for SA, first go to Edit>Preferences>Spectograms and change the Maximum Frequency to 22050 (it only needs to be set once). close preferences, then drag and drop your FLAC (or WAV etc) file into the audacity window. in the top left corner of the new window that appears you will see a triangle, left-click it and select 'spectrum'. zoom in by selecting about 2 seconds (left-click and drag to highlight a selection, then click the 2nd-last magnifying glass icon on the upper-right). Here's the classic guide to spotting lossy sources: http://www.audiohub.org/get/fa/fa.htm http://www.audiohub.org/get/fa/sa.htm Check the stickys and some of the old discussions in the Lossy or Lossless? forum to learn more. Don't hesitate to start your own thread if there's any doubt in your mind about the "purity" of any audio you're considering seeding. Please include screenshots and/or rapidshare.de / yousendit.com / megaupload.com etc link to 10 or 20 second FLAC sample.
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Re: Spotting Lossy Sources--links inside
Thanks, Five! It's always good to have this all in one place.
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ABT Seeding Policy | ABT Seeding Guide | VBT Seeding Policy | VBT Seeding Guide Software Links HERE | FAQ is HERE | Technobabble forum is HERE. If your port number is in red, you are firewalled! How to Set Up Your Router (so you aren't firewalled) and How to Port Forward on Windows XP Five's Checksums Demystified - everything and anything you want to know about checksums
On a Mac? Get XLD to rip your CDs. Please see this guide - X Lossless Decoder (XLD): How to create flawless CD rips on Mac OS X No members have liked this post.
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#3
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Re: Spotting Lossy Sources--links inside
you're fast!
you're welcome!
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#4
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Re: Spotting Lossy Sources--links inside
It's the morning here when I drink my coffee and go through all the threads.
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ABT Seeding Policy | ABT Seeding Guide | VBT Seeding Policy | VBT Seeding Guide Software Links HERE | FAQ is HERE | Technobabble forum is HERE. If your port number is in red, you are firewalled! How to Set Up Your Router (so you aren't firewalled) and How to Port Forward on Windows XP Five's Checksums Demystified - everything and anything you want to know about checksums
On a Mac? Get XLD to rip your CDs. Please see this guide - X Lossless Decoder (XLD): How to create flawless CD rips on Mac OS X No members have liked this post.
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#5
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Re: Spotting Lossy Sources--links inside
Thanks for compiling these Fiver . I personally like AnalFreq (aside from the name, it's a really handy little program). I'm not sure who the author is or why the program has seemed to start drying up though. Anyone who needs it and has no luck downloading from those links can contact me personally, as I keep a copy of the original zip file stored just in case this program goes completely underground.
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Re: Spotting Lossy Sources--links inside
you're welcome!
the author has created a new shareware program called "spectrascope". It's AnalFreq with a few more bells and whistles added: http://www.spectrascope.com/
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Re: Spotting Lossy Sources--links inside
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#8
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Re: Spotting Lossy Sources--links inside
ack...
this program is not reliable for verifying lossless pedigree. when it detects mp3-sourced audio it is quite accurate the trouble is it doesn't always detect it. so if it helps you spot lossy sources go for it but just because auCDtect says it's clean doesn't mean that it is.
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Re: Spotting Lossy Sources--links inside
I think a subforum should be made that's specifically for threads asking, "Is this show lossy" or any other questions about whether something's digitally wrong. Additionally, this subforum could be used to house threads asking if a particular show has a quirk, and if everyone's copy of that show also has that quirk.
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#10
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Re: Spotting Lossy Sources--links inside
There's already now two more "Is this mp3" threads since this thread...I think an "Is this mp3" subforum would clean things up.
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Re: Spotting Lossy Sources--links inside
i havent had time to go through any of the threads, so i apologize if my suggestion has already been handled.. but..
i think it would be very handy if someone could come up with a webpage that shows what the different frequency analysis responses or whatever look like for different equipment. IE, such as a minidisk recording will look similar to mp3 sometimes, as well as some DAT recordings depending on the settings, etc. I know it would help me out a lot if someone could really explain the differences and what to look for (if anything).. No members have liked this post.
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#12
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Re: Spotting Lossy Sources--links inside
i think based on previous discussion its kind of a consensus that analfreq is best for FA while Audition/CEP is best for SA. Am i right?
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Re: Spotting Lossy Sources--links inside
Quote:
Quote:
Quote:
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Last edited by Five; 2005-08-07 at 05:28 AM. |
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Re: Spotting Lossy Sources--links inside
So what exactly do you have to spot to see it for yourself manually? I am real interested in finding this out...
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