calculating Audio From Xml to dBFS - how to calculate the audio from xml api Options  Watch this topic  Print this topic » Normal Threaded

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dror		#1 Posted : Thursday, March 4, 2021 10:55:12 PM(UTC)
Rank: Member Groups: Registered Joined: 10/17/2020(UTC) Posts: 21		hey all i was trying to calculate the meterF1 value to dBFS but with no luck... i understand the the value is between 0 and 1 so how can i get the current dBFD ? i was trying to multiple by the fader volume and substract by 0.25... no good can anyone help?
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pm		#2 Posted : Thursday, March 4, 2021 11:04:33 PM(UTC)
Rank: Advanced Member Groups: Registered Joined: 11/28/2015(UTC) Posts: 185 Thanks: 10 times Was thanked: 32 time(s) in 27 post(s)		https://www.vmix.com/kno...44/vmix-api-audio-levels
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dror		#3 Posted : Thursday, March 4, 2021 11:12:37 PM(UTC)
Rank: Member Groups: Registered Joined: 10/17/2020(UTC) Posts: 21		thank you for the replay... the link is broken
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dror		#4 Posted : Thursday, March 4, 2021 11:15:46 PM(UTC)
Rank: Member Groups: Registered Joined: 10/17/2020(UTC) Posts: 21		sorry my bad... i have seen this this article... didn't managed to understand the formula... do i need to calc the volume and the amplitude?
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doggy		#5 Posted : Friday, March 5, 2021 12:57:23 AM(UTC)
Rank: Advanced Member Groups: Registered Joined: 12/27/2012(UTC) Posts: 5,386 Location: Belgium Thanks: 300 times Was thanked: 989 time(s) in 821 post(s)		Originally Posted by: dror sorry my bad... i have seen this this article... didn't managed to understand the formula... do i need to calc the volume and the amplitude? https://www.computerhope...r%20exponential%20power.
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RichDanby		#6 Posted : Friday, March 5, 2021 5:19:32 AM(UTC)
Rank: Advanced Member Groups: Registered Joined: 2/23/2019(UTC) Posts: 135 Thanks: 16 times Was thanked: 28 time(s) in 25 post(s)		I don't think that link answers the question, and I like a maths puzzle, so I tried to work it out myself. Using a tone generator I got these values. Level | MeterF1 0 | 1 -1 | 0.8911 -2 | 0.798 -3 | 0.7077 -4 | 0.63 -5 | 0.5619 -10 | 0.31617 -20 | 0.9988 -30 | 0.0316 -40 | 0.00998 -60 | 0.0009 -80 | 0.00009 Cutting it short.. I get dbFS = 20 * log(MeterF1)
1 user thanked RichDanby for this useful post.		stigaard on 3/5/2021(UTC)
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