48, 44.1 khz, why no and/or not 40 khz, Only for 2 channel audio........... |
48, 44.1 khz, why no and/or not 40 khz, Only for 2 channel audio........... |
  Dec 18 2002, 04:11
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 Group: Members Posts: 657 Joined: 4-December 02 Member No.: 3989  |
Look at this Poll
How high can you hear (with music & lowpass) The poll starter didn't put frequency above 20 khz in the poll So why don't just use a 40 khz PCM instead of 44.1 khz as human can't listen to frequency above 20 khz? 16 x 44100 x2 = 1141.2 kbit/s 16 x 40000 x 2 = 1280 kbit/s It does help to save some space! |
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Dec 19 2002, 01:00
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Group: Members Posts: 28 Joined: 8-August 02 Member No.: 2986 |
QUOTE (kotrtim @ Dec 18 2002 - 03:11 AM) So why don't just use a 40 khz PCM instead of 44.1 khz as human can't listen to frequency above 20 khz? One of my freshman university courses said it's an "engineering-margin". You take a little more than 2 x 20 kHz just in case, the system will always have flaws and imperfections, so they'd rather not live 'on the edge'. So for example if one of your filters cuts off a few hundred Hz too soon, it's still unhearable. Why include high frequency noises if you can't hear them and they only give you headaches and make you angry? 
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kotrtim 48, 44.1 khz, why no and/or not 40 khz Dec 18 2002, 04:11
tangent So you have some space to play about with to do a ... Dec 18 2002, 04:35 ViPER1313 Low/High pass filters and sampling rates are total... Dec 18 2002, 05:04 /\/ephaestous QUOTE From John Watkinson, The Art of Digital Audi... Dec 18 2002, 08:24 KikeG QUOTE (ViPER1313 @ Dec 18 2002 - 05:04 AM)Low... Dec 18 2002, 08:43 Gabriel The answer was given above. It is because at the b... Dec 18 2002, 09:02 SometimesWarrior QUOTE (/\/ephaestous @ Dec 17 2002 - 11:... Dec 18 2002, 09:15 Neo Neko If you can or can not hear above 20Khz etc you can... Dec 18 2002, 22:00 SometimesWarrior QUOTE (Neo Neko @ Dec 18 2002 - 01:00 PM)If y... Dec 18 2002, 22:45 LordSyl QUOTE (kotrtim @ Dec 18 2002 - 03:11 AM)So wh... Dec 20 2002, 01:56 Oge_user If I understand correctly, a wave file 44100 hz 16... Dec 21 2002, 11:22
Pio2001 In the digital domain, yes. (example, generating t... Dec 21 2002, 12:42 |
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