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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: RE: A very technical curiosity - how to assess the quality of a spdif stream ? posted by beppe61 on May 18, 2015 at 06:15:26:
1. Loop the output back or send it to another sound card. Run for a long time and make sure that all the bits received are the ones sent. This can be done by recording the SPDIF output and comparing the source and destination files.
2. Use a scope and look at the eye-pattern. This will show the presence of noise and reflections on the signal as well as gross jitter. This will also show the signal levels.
3. Measure the clock rate with a frequency counter.
If the signal passes these tests then it's good. Whether the resulting sound is good or not will depend on the DAC that's connected to the SPDIF source.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: A very technical curiosity - how to assess the quality of a spdif stream ? - Tony Lauck 05/19/1510:48:37 05/19/15 (5)
- Question about eye-pattern measurement setup - sleeper 19:37:16 05/21/15 (1)
- RE: Question about eye-pattern measurement setup - Tony Lauck 06:39:43 05/22/15 (0)
- RE: A very technical curiosity - how to assess the quality of a spdif stream ? - beppe61 01:32:29 05/20/15 (2)
- RE: A very technical curiosity - how to assess the quality of a spdif stream ? - Tony Lauck 05:39:14 05/20/15 (1)
- RE: A very technical curiosity - how to assess the quality of a spdif stream ? - beppe61 07:25:36 05/20/15 (0)
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