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2007-08-28, 01:59
I have always thought that XBMC playing a CD or a wav-file will produce the exact same result as a 5000dollar cd-player when using the digital output on both machines. Is this true?
It's digital all the way, so that would mean that there is only one way of making the output-signal, the right way! or is it??
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pike
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only signal processing we do is to upsample it from 44.1kHz to 48Khz.
Upsampling is never without quality losses, so I'd say a player that doesn't need this (most standalone cd players probably) has an advantage right there.
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OK, so what are the advantages of upsampling? Can we just disable it?
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spiff
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advantages: we can actually output the audio. the xbox hardware only supports 48khz
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OK, that is a big advantage!
How much of a quality loss is this? Feels like it should not effect the signal since 44.1k < 48k. Isn't it just as simple as adding nothing for frequencies higher than 44.1kHz?
(As you probably know by now, i'm not that well educated in this subject...)
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pike
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It doesn't make any sense that xbox digital output should have less bass than other products digital outputs.
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Damn, you guys know a lot of stuff!
I’ve been converting my Cd’s to 48K MP3’s. Am I wasting my time? I figured that Lame could do a better job up sampling than an on-the-fly- conversion.
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pike
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why would you do that ? you gain 0 quality by doing it, you cant gain something that isn't there
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The DAC might be screwing up the bass. I find the base thru xbmc to be quite good although I dont use xbmc for music and leave that to my squeeze boxen whos internal DACs produce great quality audio, much bettr then what the xbox can muster (not xbmc's fault).
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pike
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yeah but if you're using the xbox's DAC you're talking analog out
DAC = Digital to Analog Converter