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Elijah
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Joined: 20 Jan 2004
Location: Calgary, Alberta, Canada Eh?
PostPosted: Mon Apr 17 2006 20:50    
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hmm
that could be so.

but at the lower speed, it could be that the frequency ceiling could be lower. i dont know.

i was just making an observation. I've never seen those spikes on mp3s


- Elijah
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QBical
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Joined: 04 May 2003
Location: Utrecht , The Netherlands
PostPosted: Mon Apr 17 2006 22:40    
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If you work with vinyl you also have to work with the needle, wich has a certain bandwith aswell, maby it's 'improved' for dance music and has an earlyer roll-off on the high freq to reserve the extra energy for the low-end...

but I'm probably just talking sh*t, but it seems logical though, the better the needle the better the sound...


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Sunbuster
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Joined: 05 May 2003
Location: Finland
PostPosted: Tue Apr 18 2006 09:45    
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From what I've read, vinyls are cut pretty sharply after 16khz in the mastering because, like Qbical suggested, the needle has a certain physical limit to what frequencies it can reproduce. On the other hand, I just looked through some specs for a bunch of styluses and they all supported a range typically from 20-20000 Hz, so that shouldn't be a problem Confused Looks like I/we need to do more research on this matter.

As for the spectrum that is an mp3, you might be right there. The file I used to produce that curve was an wav file, but it is possible that the source I got it from at some point might have had it as an mp3 and then converted it to wav without thinking about the results? Anyway, it seems I'll have to do an extensive analysis of various vinyl tracks to clear this up. I'm going to transfer all my vinyls to a digital medium at some point in the near future, probably over the summer. At the same time I could do some research into this matter.

Anyway, thank's for pointing out the possible other reason for the cut at 16Khz, Atlantis Smile
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StyrmanLjungberg
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Joined: 03 Feb 2006
Location: Östersund, Sweden
PostPosted: Fri Apr 28 2006 20:04    
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I vote add this too Wiki! Very Happy
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Inge
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Joined: 04 May 2003
Location: Nieuw Lekkerland @ Holland
PostPosted: Fri Apr 28 2006 20:35    
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You can always do that yourself. Just copy-paste the text to it. In this case, I already did it Smile

http://www.madtracker.org/wiki/index.php/Spectrum_Analyzer


Care for a game of Monopoly?
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StyrmanLjungberg
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Joined: 03 Feb 2006
Location: Östersund, Sweden
PostPosted: Fri Apr 28 2006 22:23    
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Inge wrote:
You can always do that yourself. Just copy-paste the text to it. In this case, I already did it Smile

http://www.madtracker.org/wiki/index.php/Spectrum_Analyzer


Oh, didn't think about that. Man I'm stupid Razz haha...
Great though! Smile
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BeatMax
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Joined: 04 May 2003
Location: Germany
PostPosted: Sun Apr 30 2006 01:24    
Spectrum of different encoding standards
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I tried out to encode a wav in mp3 and ogg (64kbit/s) and captured the frequency spectrum along with some audio examples.

>> Here are the examples <<


-----------------------------------------------
B E A T M A X
Madtracker-Tutorial - Personal Releases
https://linktr.ee/beatmax_prediction
https://soundcloud.com/beatmax_prediction
-----------------------------------------------
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