Did Redbook get it right?


I've always felt a tension between the narrative that a) the Redbook spec murdered music, probably in cahoots with greedy plastic vendors, and b) the great respect I've had for engineers I have worked with. I would think they knew what they were doing, considering the stakes and the state of their art at the time.

I leaned towards the murder/greed scenario, especially as my original Sony 520-ES CD player presented a fleshless corpse of Joni's Blue album, and the few high-end players of the time I tried, like the Enlightened Audio, seemed to fail at resurrection.

I've reconsidered. If I rip my CD's to FLAC, feed a Benchmark DAC over USB, and into my tube amplification, I am stunned by how good and satisfying many CD's sound. I have no desire to fire the Linn Sondek back up. I have no sense of things missing. Sure, there are many crap CD's, but is any of that stink coming from Redbook spec? Some newer CD's simply stun. I not into country, but something like the Mavericks' In Time CD is acoustically complete and fully fleshed.

I've been over to HDTracks and Acoustic Sounds to download hi-rez versions, and I can feel the pull to feed my rig the best I can buy. It's such a good story, easily embraced by the audiophile mind, but I'm increasingly wondering if it is all marketing razzle-dazzle...more, denser, higher...and in the end, Redbook got it right, and the new DACs finally do it justice.

Always with an open mind, and there's much better gear than mine, but I'm newly impressed by the original Spec.
electroslacker
So digital wasn't perfect right out of the starting gate. Was the first turntable?
I think we were lucky to get Redbook quality digital. At the time, the technology didn't exist to do things like lossy compression. If the industry waited to release a digital format, we may have gotten MP-3 instead.

In my view Redbook did get it right, but it's only fully realized when played with correctly implemented R2R Multibit Ladder Dac convertors running with todays far better I/V stage setups.

Not when Redbook is played through 1 Bit, Bitstream, Sigma Delta, or ESS convertors, then it sounds at best, average.

Cheers George
The technology simply had to catch up with the format. Isn't that just about true with all things?

All the best,
Nonoise

Correct, I/V stages going back in the days of R2R Ladder Multibit dacs, were opamps with negative feedback, no matter how good the opamp was, the negative feedback couldn't handle the very high frequency glitches noise and other rubbish that came out of them.

Today we now know to use active I/V stages that don't use feedback, and they then can make these old R2R Multibit dacs really come to life.

Passive I/V resistors for R2R Multibit are ok, but they kill the output too much, so the next stage has be amplified too much to get anywhere near 2v, trouble is that the noise and crap gets boosted along with it and you end up with it on the output.

The best Multibit dac with good I/V stage I've heard is the PCM1704 followed by the PCM1702 then the TDA1541

Cheers George