How does a Transport effect sound?

One wonders if anyone has ever considered going pleisiochronous?

Uh, the interface problem is eliminated but not the jitter. NOPPO!

I love generalizations. Like “all of these tweaks can be measured.” And “They are not that significant.” 🤡 I am also quite fond of marketing prose.

Systems engineer. Exactly! Not a scientist. Bean counter.

You forgot to add, “unlike myself.” Tee hee

I would be quite interested in hearing from anyone who uses tweaks when ripping from a CD. You know, colored CDs, colored tray, demagnetization, edge beveling, ionizers, Silver Rainbow Foil, insuring the CD is absolutely level, things of that nature. Anybody? Can you tell I don’t really buy into the whole Read until Perfect thing? Anymore than I buy into the Reed Solomon Error Code thing? Is it just me? The word perfect has been so overused. Ever since the very beginning.

audioengr
Geoffkait: “Background scattered light has not been addressed by any manufacturers, at least not to any great extent. So there’s that. And magnetism and static electricity are still problems, there’s that, too. I suspect maybe “jitter” isn’t the do-all end-all for various problems involved with CD playback. There’s also the nagging question of why they can’t make the clear layer in CDs a little more transparent.”

All of these problems are addressed by two current solutions:

1) reclock the S/PDIF output from the transport

2) design a transport using a CDROM and a computer motherboard and memory. Buffer in memory and spool it out over S/PDIF

And JITTER is the THE ONLY issue with the S/PDIF output on a transport, period!

I am a EE that has designed digital systems for 42 years and have designed dozens of digital audio interfaces including S/PDIF, AES/EBU, I2S, differential I2S, 6 generations of USB, Ethernet. I know what I'm talking about.

There are obviously other issues that come up if you use the D/A inside the player and the analog outputs.

Steve N.

Empirical Audio


>>>>Obviously, I’m talking about CD players and transports. Furthermore the scattered laser light issue is not (rpt not) a jitter (timing) issue. So jitter is not the only issue (for the majority of audiophiles).

Background scattered light has not been addressed by any manufacturers, at least not to any great extent. So there’s that. And magnetism and static electricity are still problems, there’s that, too. I suspect maybe “jitter” isn’t the do-all end-all for various problems involved with CD playback. There’s also the nagging question of why they can’t make the clear layer in CDs a little more transparent. 😬

Actually it’s not 1s and 0s. It’s not 1s and 0s until the data gets to the A to D converter. The laser is simply reading ON and OFF depending on whether the laser beam is hitting a pit or land. Actually the laser reading process is an analog process, not digital. Also, the length of the lands, which are variable, helps determine what the actually digital data is.

There are several problems that make the reading of the “data” on the CD imperfect. One is wobbling of the CD due to out of round condition, various types of vibration and/or not being absolutely level during play. Another is background scattered laser light that makes its way into the photodetector. The photodetector is kinda stupid and can’t tell the difference. Yes, I know what you’re thinking, “But the Reed Solomon Error program is supposed to take care of all that.”