What digital evolution?


I posted this as a reply in another thread, but believe it's thought-provoking enough to warrant its own post:

Is it really accurate that digital processing technology is evoloving (depreciating) quickly? The economics of technology don't seem to support this.

Unlike computer hardware which benefits from Moore's Law, and can therefore process more software at a given price point due to falling prices of memory and processor power, DACs are still processing the same 44.1 kHz software that is over 20 years old (not talking about high-res formats like SACD and DVD-A). DACs are not challenged with processing bigger programs at faster speeds that need more computer memory. Aside from upsampling, are there really improvements in D/A algorithms or other techniques that benefit from Moore's Law economics?

If this is true, good DAC design should remain competitive over time. Aren't the "best" DACs (Meitner, DCS, Weiss, etc) still competitive years after release? What technology is evoloving so quickly in D/A conversion?
skushino

Showing 3 responses by redkiwi

I don't think the parallel with Moore's Law is terribly relevant, but if you think it is, then ask yourself whether people are much happier with their computers these days because of chip speeds. I would suggest not much more than people are happier with their DACs.

One obvious issue is that audio gear performance is as much driven by vibration issues, imperfect passive components, management of stray interference, how much trial and error through listening went into the finalisation of the design as it is by improvements in active components like DAC chips.

Another obvious issue is the problems of needing to stay within a standard format - the size of the CD/DVD, Redbook standard etc.

For a more continuous development of digital audio we need to move CD Players away from being vertically integrated standardised items towards open architecture, open standard devices, and move away from physical media like CDs to downloaded files. Therefore in the future, if your device has enough power, the release of a new piece of music in a new format is as simple as downloading the file and the software to decode it into analogue audio. Your PC is already a device of that type, and Media PCs are moving towards becoming more specialised to meet entertainment needs. It is not too much of a stretch to imagine the release of a Wadia Media PC (in whatever incarnation they are in at the time). Some of us remember that this vision was first envisaged by, I think, Theta. But our understanding of what it takes to deliver good audio via digital has still to evolve a bit before that dream will be a reality. And we also have to overcome the desire of the likes of Microsoft to turn the Media PC into a proprietary device, or one crippled by high royalties for its operating system - but I think Linux has that one covered.
Skushino, I didn't intend to attack your opinion. I guess I would point you to some of the minimalist DACs around that eschew most of the so-called advances in DACs - ones with no over sampling or up sampling or with no digital filter, which by being minimalist have a certain life to them that the arguably over-engineered DACs don't. In some ways the new DACs are better and in other ways they are not. You are quite right to question the hype.
Squeezebox, from slimdevices is not far off in one sense. An MP3 Jukebox is not far off in another. Similarly Media PCs. Moore's Law and FTTH (fibre to the home) will solve the technology gap. The question will be around how a new music/movies cartel forms (inevitable I think, since the supply-side always strikes back).

We have to hope that FTTH and innovations in disk stroage - such as a terrabyte of storage in the size of an iPod - happen soon enough. Soon enough for what? A few things I guess, like a generation that thinks MP3 is the best quality obtainable.

From what I can see, telco regulation has stuffed up broadband over DSL - which could have been a happening thing years ago if the regulators had been wise enough not to force stupid wholesale regulations and copper loop unbundling - but the emergence of FTTH could be quite rapid as the regulators seem to have finally seen the light (pardon the pun). So no need for compression as far as downloads are concerned.