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Old 19th April 2006, 11:52 AM   #1
lndm is offline lndm  Australia
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Default Spdif sound card

I am considering using my computer as a cd transport. I could rip tracks to wav files before playing them. I am assuming this would help smooth the flow of data.

I have a yamaha sound card with spdif output. I have two questions.

1. How do I ensure the spdif output is a faithful copy of the raw CD data. for example, not an A to D recreation or conversion (from cd drive, software or the soundcard).

2. is this output suitable for D to A (like direct connection to a DAC).
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Old 19th April 2006, 01:44 PM   #2
Lovan is offline Lovan  Sweden
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Hello

One way I've seen people testing if the dac is outputting correct data is using a HDCD and a HDCD kapable DAC. HDCD only works if the data is unaltered.

Suitable is difficult to tell. It should work thou.
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Old 19th April 2006, 02:23 PM   #3
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Just make sure that no audio cable is connected from the CD Rom drive to your motherboard. Then the contents from your CDs should be recorded as wavs without any DA-AD steps onto your hard drive. I use audiograbber, freeware, to convert to wav.
The spdif output should be in the correct format for an external DAC. On my system fitted with an Emu 0404 soundcard this works beautifully. It converts optical data from my CD player (Sony X222ES) to analog and also wav data from the hard drvie to analog while it has an optical output should I want to use yet another external DAC. Hope this helps.
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Old 27th April 2006, 02:18 PM   #4
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Make sure your soundcard does support 44.1KHz, many cards only support 48KHz and resample the signal.
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Old 27th April 2006, 02:36 PM   #5
lndm is offline lndm  Australia
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This is helpful advice, thanks guys. I think I should go ahead with this, and ultimately review my choice of soundcard.
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Old 27th April 2006, 02:44 PM   #6
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I use the tiny M-Audio 'Transit' USB sound interface. I've just checked the performance of it this morning using the 'RMAA' freeware and it is remarkably good.
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