Home Digital Drive

Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

RE: Interesting Video Audio Myths

As has already been pointd out earlier, this video has been around for quite some time now. It is very informative, in it's hands-on demonstrations utilizing continuous signals. What it leaves out is an effective demonstration of transient signal handling.

The sampling theorem is predicated not only on signals being band limited, but also on them being infinitely continuous - not only continuing past the end of the universe but, just like God, having always existed. Any other kind of sampled and reconstructed signal is mathematically imperfect. The degree of imperfection is a function of the signal's duration. The shorter the duration, the geater the imperfection. Conversely, as the signal duration lengthens, the more rapidly the imperfection shrinks to insignificance.

Signal duration caused imperfection manifests as a stretching/spreading/smearing of an transient's duration, and ALL real signals are transient to some degree or another (meaning, they begin and, eventually, end). The imperfection is negligible for many DSP applications, but not for all. This is what Meridian is primarily focused on with MQA. They believe that transient spreading is not an negligible effect with digital music application. I don't know whether that's corrct or not, but the reality of the transient duration smearing mechanism is easy enough to understand.
Ken Newton

Edits: 03/16/17

This post is made possible by the generous support of people like you and our sponsors:
  Sonic Craft  

Follow Ups Full Thread
Follow Ups
  • RE: Interesting Video Audio Myths - knewton 12:20:00 03/16/17 (0)


Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.