"Old Effects" and the MC-1

Posted by Philip Brandes [IP: 152.171.151.58] on September 01, 1999 at 12:39:51
Using Mozilla/3.01-C-MACOS8 (Macintosh; I; PPC):

In Reply to: posted by Andre Yew on September 01, 1999 at 11:57:18:

: I think it's worth pointing out that most DSP algorithms do not have O(n) run time, so a 9% increase in sampling rate does not necessarily imply only a 9% increase in computation time.

: I think Party may sound like the only one with O(n) characteristics, but even then I'm not sure how Lexicon's bass steering and filtering affects that estimate.

Whew! Math again... Just to make sure I understand the implications of this: you're saying, then, that the initial assumption--that 48kHz processing is basically a 9% increase in CPU load over 44.1kHz--is only true if the algorithm scales linearly. Since a lot of DSP algorithms do not scale this way, and many in fact scale up much faster, there's likely much more than a 9% increase for processing-intensive effects.

That would explain why for effects like Panorama, or Nightclub, where the Lexicon must synthesize entire channels, the processor overhead might be prohibitive, whereas Party which is simply replicating existing channels would be relatively easy? An intriguing point...thanks for helping me understand some of the complexities involved.

Cheers,
Philip Brandes

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