4
$\begingroup$

My purpose is to model the attack of a piano key. As the key is pressed a sound must be emitted. When the key is released the sound must stop with decreasing volume.

I have a partial success when the time is fixed. For example, if time=2 then the following code simulates a key pressed for 2 seconds. But I don't know how to change it so that the sound stops (with a "natural feeling") immediately after the key is released!

Button[Graphics[{White, Rectangle[{0, 0}, {1, 2}]}],

 EmitSound[SampledSoundList[{{0.}}, 8000], "Preemptive"]; EmitSound[

  Play[(1 - E^(-30 t)) (1 - E^(-18 (time - t)))  Sin[ 
     2 Pi 440  t], {t, 0, time}]
  ]
 ]
$\endgroup$
2
  • $\begingroup$ I can't test it now but have you tried to use EventHandler with it's events? I'm not sure if the transition will be smooth but it is worth to try. $\endgroup$
    – Kuba
    Apr 30, 2014 at 8:30
  • 2
    $\begingroup$ Detecting the release of the key is a tricky problem. See this. $\endgroup$ Apr 30, 2014 at 9:16

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.