Negative percentages for ACSS pause properties

When I wrote the initial version of ACSS, I was
initially  inclined to outlaw negative pause durations; however I did not do
so  because I also felt (and still feel)
that the area of aural renderings is not as well explored as the area of
visual presentation, and I would like to the ACSS spec to permit the maximum
possible level of experimentation.

The nice thing about the WWW is that it is very easy to share user experiences
among a wide range of users --simply implement it in a browser, have a WWW
page that uses the feature, and have a bunch of users try it--
in my opinion there is no better way to test out and experiment different
rendering strategis.

To return to the specific question here:

negative pauses could for instance be used in a software
synthesis environment to superimpose multiple channels of apeech and
non-speech auditory output.
Of course, care needs to be taken in how one uses it--
e.g. specifying that the star spangled banner be played at time t - 100mss
as the start event for a document abstract  may be appropriate, but saying
that it start 1000s before the abstract is spoken is probably silly.

(s == seconds ms == milliseconds)

Best Regards,

      Adobe Systems                 Tel: 1 (408) 536 3945   (W14-129)
      Advanced Technology Group     Fax: 1 (408) 537 4042 
      (W14 129) 345 Park Avenue     Email: raman@adobe.com 
      San Jose , CA 95110 -2704     Email:  raman@cs.cornell.edu
      http://labrador.corp.adobe.com/~raman/raman.html (Adobe  Internal)
      http://www.cs.cornell.edu/Info/People/raman/raman.html  (Cornell)
    Disclaimer: The opinions expressed are my own and in no way should be taken
as representative of my employer, Adobe Systems Inc.

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