How can a user change volume in a percentage? <Solved>

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- corlenbelspar
- - Joined 14 Aug, 2013
  - 147 topics • 442 posts
- 1
- 16 Aug, 2021
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I want the game's settings to allow the user to change a volume from 0% to 100%, but of course I need some kind of equation thanks to the fact dB doesn't work this way with 0 being full volume, -10 being half that volume, -20 being half that, -infinity being mute etc.
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- Maverick1912
- - Joined 13 Nov, 2014
  - 28 topics • 902 posts
- 1
- 16 Aug, 2021
- Quote
So from 0 to -20 you have 20 steps.

Let get the current Volume / 20 * 100 => you will have the % of volume.
- R0J0hound
- - Joined 15 Jun, 2009
  - 90 topics • 7,280 posts
- 5
- 16 Aug, 2021
- Quote
Decibels are actually on a logarithmic scale, so it would be:

decibels = 20*log10(percent/100)

0% -> -infinity db

50% -> -6.02 db

100% -> 0 db
- R0J0hound
- - Joined 15 Jun, 2009
  - 90 topics • 7,280 posts
- 3
- 28 Jun, 2022
- Quote
According to the construct docs -10 is half but other sources online show -6 as half for standard audio decibels. Maybe construct uses a different scale? Or maybe it was a typo?

At any rate if you want it to match the construct docs just change to formula to:

33*log10(percent/100)