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In Reply to: of course someone tries to piss on CMPs parade... posted by El Dante on July 21, 2010 at 03:52:56:
"Introducing noise in the process. Better to playback at the original rate - upsampling won't improve quality, it erodes it."The generic term is "asynchronous sample-rate conversion"...... In case you're interested in *how* upsampling introduces noise into the process, click link below.
"Meaningless. ASIO is useful in a specific context but has no advantage in terms of straight audio playback quality."
ASIO is a means of bypassing the "kmixer" in the audio processor of some Microsoft operating systems. So it does have merit. Some prefer Microsoft's own Kernel Streaming, others prefer ASIO, yet others prefer alternative playback methods.
"Okay, kinda cool, if HDD noise is an issue I guess." (Decoding FLAC ahead of time.)
I think FLAC sounds significantly worse decoded in real time than decoded ahead of time to an uncompressed format.
"If you want audio quality, there isn't much you can improve on unless you're playing back mp3's - in which case the best mp3 player is apollo, as measured by scientific tests (in terms of conforming to the intended signal)."
I personally think MP3 lacks the resolution to where the playback software wouldn't make much difference....... (But CD quality and high-rez is a totally different story in such regard.)
"With lossless, if you just play back at the intended sample/bitrate, that's actually best."
That I agree with.......... Upsampling CD isn't much different from playing it through kmixer, in my humble opinion. Only the converted sample rate is higher.
"Sorry to take a dump on your parade. But as a programmer, with a BSc in Comp Sci, I have to say the article on 'software-induced jitter' on that website is the biggest load of unscientific idiocy I've encountered in audiophile circles. It is actually just wrong. There is no such thing (unless your computer is faulty or very, very slow (pre 1997))."
Any changes on CPU and thread load varies the "latency" of the transmitted signal, which is in essence an introduction of jitter. Aside from RFI, the biggest problem with PC-based audio playback. A common mistake is the notion that if there is no documented jitter in the PC data stream, the jitter somehow does not exist.
As one who's slammed a lot of technical papers, I find the "Software-Induced Jitter" article to be relatively sound in explanation.
Edits: 07/23/10
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Follow Ups
- Right and Wrong............. - Todd Krieger 20:31:05 07/23/10 (1)
- RE: Right and Wrong............. - fmak 08:52:00 07/24/10 (0)
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