Calculate addVuMeterObserver

[NukeArts]

Hello,

Does anybody know how I can calculate the value from addVuMeterObserver (it is from 0 .. 1) to dB?

br, Ralph

[lem8r]

Code: Select all

10 * Math.log(num) / Math.LN10;

[NukeArts]

Code: Select all

10 * Math.log(num) / Math.LN10;

Sry this does not work out.

with 0,5 bitwig is at -18,1dB and your formula is at -3dB

[NukeArts]

I throw in this graphic here. The question is: What is used in Bitwig?

[BufoBufo]

Just in case you're more interested in the display values than in the exact formula, here's an array of the volumes. It's gathered from the channel's volume observer, but if you use range=128 for addVuMeterObserver, the mapping is probably the same:

Code: Select all

const VOLUME_DISPLAY_VALUES = [
  "-Inf dB",
  "-120.2 dB",
  "-102.1 dB",
  "-91.6 dB",
  "-84.1 dB",
  "-78.3 dB",
  "-73.5 dB",
  "-69.5 dB",
  "-66.0 dB",
  "-63.0 dB",
  "-60.2 dB",
  "-57.7 dB",
  "-55.5 dB",
  "-53.4 dB",
  "-51.4 dB",
  "-49.6 dB",
  "-48.0 dB",
  "-46.4 dB",
  "-44.9 dB",
  "-43.5 dB",
  "-42.1 dB",
  "-40.9 dB",
  "-39.7 dB",
  "-38.5 dB",
  "-37.4 dB",
  "-36.3 dB",
  "-35.3 dB",
  "-34.3 dB",
  "-33.4 dB",
  "-32.5 dB",
  "-31.6 dB",
  "-30.7 dB",
  "-29.9 dB",
  "-29.1 dB",
  "-28.3 dB",
  "-27.6 dB",
  "-26.8 dB",
  "-26.1 dB",
  "-25.4 dB",
  "-24.7 dB",
  "-24.1 dB",
  "-23.4 dB",
  "-22.8 dB",
  "-22.2 dB",
  "-21.6 dB",
  "-21.0 dB",
  "-20.4 dB",
  "-19.9 dB",
  "-19.3 dB",
  "-18.8 dB",
  "-18.3 dB",
  "-17.8 dB",
  "-17.2 dB",
  "-16.8 dB",
  "-16.3 dB",
  "-15.8 dB",
  "-15.3 dB",
  "-14.9 dB",
  "-14.4 dB",
  "-14.0 dB",
  "-13.5 dB",
  "-13.1 dB",
  "-12.7 dB",
  "-12.2 dB",
  "-11.8 dB",
  "-11.4 dB",
  "-11.0 dB",
  "-10.6 dB",
  "-10.3 dB",
  "-9.88 dB",
  "-9.50 dB",
  "-9.13 dB",
  "-8.77 dB",
  "-8.41 dB",
  "-8.05 dB",
  "-7.70 dB",
  "-7.36 dB",
  "-7.02 dB",
  "-6.68 dB",
  "-6.35 dB",
  "-6.02 dB",
  "-5.70 dB",
  "-5.38 dB",
  "-5.06 dB",
  "-4.75 dB",
  "-4.44 dB",
  "-4.14 dB",
  "-3.84 dB",
  "-3.54 dB",
  "-3.24 dB",
  "-2.95 dB",
  "-2.67 dB",
  "-2.38 dB",
  "-2.10 dB",
  "-1.82 dB",
  "-1.54 dB",
  "-1.27 dB",
  "-1.00 dB",
  "-0.73 dB",
  "-0.47 dB",
  "-0.21 dB",
  "+0.05 dB",
  "+0.31 dB",
  "+0.56 dB",
  "+0.81 dB",
  "+1.06 dB",
  "+1.31 dB",
  "+1.56 dB",
  "+1.80 dB",
  "+2.04 dB",
  "+2.28 dB",
  "+2.51 dB",
  "+2.75 dB",
  "+2.98 dB",
  "+3.21 dB",
  "+3.43 dB",
  "+3.66 dB",
  "+3.88 dB",
  "+4.11 dB",
  "+4.33 dB",
  "+4.54 dB",
  "+4.76 dB",
  "+4.97 dB",
  "+5.19 dB",
  "+5.40 dB",
  "+5.61 dB",
  "+5.81 dB",
  "+6.02 dB"
];

Based on this script:
https://github.com/justlep/bitwig/blob/ ... control.js

Hope it helps.

[pammel]

Has anyone found a solution or a formula? Unfortunately, there is nothing about this values in the Bitwig API documentation (addVuMeterObserver()).