sound tracks

[Hans Hagen <pragma@wxs.nl>]

Hi all, 

In order to make context a bit more hip (to quote Ed), I added support for
sound. 

The main reason for this feature was that Thanh wanted to know to what
extend sound was supported. Currently sound is a special case of a movie
annotation, but it does not require the movie plug in. Currently only
external sound files are supported. 

  \useexternalsoundtrack [label] [filename] 

so, 

  \externalsoundtrack [somesound] [test.wav]

is legal. 

One can invoke a sound with: 

  \goto{start melody}[StartSound{somesound}]

For those unfamiliar with the already old movie mechanism: 

  \externalfigure[fancy.mov][label=see me,width=4cm,height=3cm]

and 

  \goto{wanna see me}[StartMovie{see me}]

Other actions are Stop.., Pause.. and Resume.. All are actions, so
[action(StartMovie{..}] also works; and, of course, all can be part of a
chain of refs (see 1998-001.pdf): 

  \goto {ugh} [somechapter,ResetForm,StartSound{read me}] 

Sound support will be avaible in the next (beta) release. 

Hans

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                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.nl
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