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#1 |
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
Age: 48
Posts: 3,835
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Simple 14 bit audio question...
Hi,
If I take a 16 bit audio file, and chop of the bottom two bits from each sample, it seems that the sound quality (when playing back in 14 bit on the miggy) isn't reduced. What I want to know is simple: Is there really no audible difference, or is there still some? Any thoughts are appreciated ![]() Edited: Corrected the bad sentence. Last edited by Thorham; 04 June 2010 at 17:07. |
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#2 | |
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
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This seems to be solved thanks to amiga.org (no offense guys
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#3 | |
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Quote:
Conversion to 14 bit may not be "necessary", because you can toss away the extra bits at runtime. But if you're going to throw them away, why store them at all? They take up additional unnecessary space. Also, simply throwing away the least significant bits does not result in the best possible sound quality. Dithering and noise shaping reduce (but don't eliminate) the quality loss caused by bit reduction. So there are two reasons to convert: Disk space and sound quality. (Of course you could dither and noise shape in real time, but it costs CPU time that isn't insignifficant on an Amiga.) |
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#4 | ||||
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
Age: 48
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#5 | |||
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Noise shaping is tricker, as you use coloured/filtered noise instead of white in order to move the hissing to parts of the frequency spectrum where our ears are less sensitive. As mentioned in the other thread, both methods will make it harder to compress the signal though, as noise doesn't compress well. |
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#6 | |
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
Age: 48
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Good
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#7 | ||
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#8 | ||
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
Age: 48
Posts: 3,835
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Quote:
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