# Built-in parameter : Speed (Velocity length)

**URL:** <https://qa.fmod.com/t/built-in-parameter-speed-velocity-length/11034>\
**Category:** FMOD Studio\
**Created:** [April 29, 2013, 8:47pm UTC](https://qa.fmod.com/t/built-in-parameter-speed-velocity-length/11034 "2013-04-29T20:47:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![clevijoki](https://avatars.discourse-cdn.com/v4/letter/c/e0b2c6/32.png) [@clevijoki](https://qa.fmod.com/u/clevijoki)\
**Post date:** [April 29, 2013, 8:47pm UTC](https://qa.fmod.com/t/built-in-parameter-speed-velocity-length/11034/1 "2013-04-29T20:47:59Z")

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Since we’re setting the velocity of the event instance with set3DAttributes could we have a built in parameter for speed that maps to the length of that velocity?

This can be used to get a number of effects, and would just allow sound designers to be a bit more independent if they didn’t have to ask for this parameter to be setup in code.

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**Author:** ![Guest](https://avatars.discourse-cdn.com/v4/letter/g/8dc957/32.png) [@Guest](https://qa.fmod.com/u/Guest)\
**Post date:** [May 10, 2013, 2:33am UTC](https://qa.fmod.com/t/built-in-parameter-speed-velocity-length/11034/2 "2013-05-10T02:33:40Z")

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Thanks for the suggestion, we’ll add this to our task list. How soon do you think you would need this feature?

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<div class="post-metadata">

**Author:** ![clevijoki](https://avatars.discourse-cdn.com/v4/letter/c/e0b2c6/32.png) [@clevijoki](https://qa.fmod.com/u/clevijoki)\
**Post date:** [May 13, 2013, 7:17pm UTC](https://qa.fmod.com/t/built-in-parameter-speed-velocity-length/11034/3 "2013-05-13T19:17:01Z")

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I’d say it’s low priority, as we have the ability to send the parameter now, but the more stuff possible in studio the better.