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all these sources of possible signal jitter could not alter the sound (or the file's bits) in any way. What I found was that both files (~ 5 minutes of music) were absolutely identical after running through 10 metres of so-called 'inferior' (= optical) digital interconnects and the DAT's internal circuitry. chop off the digital silence (at start and end) on both files record the digital input signal to a new wav file while it is played back (full duplex mode)Ħ. Foobar's Kernel Streaming (I used standard MS DirectSound with WinXP) will do fine.ĥ. use a sound layer that does not alter the sound. Connect the digital output of your device to the digital input of your soundcard (again, I used 5m of standard optical interconnect)Ĥ. Connect the soundcard's output to a digital device of your choice (I used a Sony DAT deck in record monitor because it can feed the signal back) via a 5m standard optical interconnectģ. Envy-24-based) soundcard with optical input and output. I suggest you perform the test that I once performed (which opened my eyes on digital audio and the myth about digital interconnects). any constant behaviour like this would lead to extremely audible artifacts. Your third variant will most likely be caused by extreme signal jitter (that is way off the rigid specs) and a missing input buffer with no re-clock or re-synch. The third variant is usually handled with checksums and fixing algorithms, like the one cd drives use to fill up gaps up to ~2.5mm on the disc. 100001 can be received as 100001 (correct), not at all or (and this is important) messed up, like 111001. It is not true for a binary string though. Quote from: hydr0x on 14:06:05 it's a common misconception that digital is either 1 or 0. Obviously digital links should normally be completely error-free.
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the talking between the digital output on my PC and the input on the DAC introduces no need for error correction. not a badly scratched disk that can only be read completely by using intensive error correction (which as you said does 'guess' and 'interpolate') 'perfect' copy (ripping) off CD by using various tested verifying techniques Distortion can lead to false digital data and if there's no correction or at least check algorithm in the receiving unit this IS a problem and affects the quality of the data, and thus the sound quality.Īh yes but now I have to point back to my original assumptions, which were essentially:
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I do of course understand that for real-time reproduction a standalone CD player can probably do a lot more subtle error correction, prevent read errors by top of the line stabilized optics etc, but the PC can simply re-read until it works. With these technologies, I think it is more-or-less safe to say that the WAV file on my harddisk would be identical to the WAV file the CD maker had when he burned his end-mix to the gold master. AccurateRip (which compares the CRC of the digital data to internet databases with 'known good' CRC's) C2 error correction - a very powerful method I ask this because I have been led to believe that the two technologies: Is there any reason to assume that a $31209847120347 standalone CD player with digital out would supply a better digital signal to the 'amazing DAC' than a PC could that has ripped the CD to harddisk? Now can someone answer me the following question: No copy protection on the CD that tries to confuse reading mechanisms. On the other end of the output cable, there is an 'amazing' audiophile DA converter, whatever that might mean for you personally.
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The path from the 'harddisk WAV file' to this digital out is direct, no volume control/equalisation,anything. Audio card has a perfect digital out that does not resample/tweak the input it receives from the PC Im sure this topic has come up before, but I couldn't find it so here goes.ĪSSUMPTIONS: (can be discussed elsewhere)