Rank: Member
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Joined: 10/21/2020(UTC) Posts: 17  Location: Bulkington Thanks: 5 times
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So i have been trying to create a simple volume up button (increase/decrease by 3% for example!) I'm most of the way there, but have hit a wall! The general idea is, put the current volume level into a variable, add/subtract "X" amount, done! However when you read the volume, it's looks like it is logarithmic, not linear! i.e. if set to 50%, it reads as 6.25% it also doesn't help that when i search for how to convert the two, most answers require the Log function, which I don't think is supported within vMix! So this is what i have so far; Quote:
Dim vol as Double
Dim newvol as integer
Dim callerinput as integer = 1
Dim x as new system.xml.xmldocument
Dim xml as string
'.... RUN SCRIPT
xml = API.XML()
x.loadxml(xml)
'Get volume level
vol = x.selectsinglenode("//input[@number='" & callerinput & "']/@volume").value
'the maths that is missing!
newvol = vol-3
'set new volume level
API.Function("SetVolume",callerinput,newvol)
'to see if the maths works
Console.WriteLine (vol)
Console.WriteLine (newvol)
it works, right up until I need to sent the new number, if you know of an easier way, or can fill in the maths blanks, it would be appreciated!
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Rank: Member
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Joined: 6/23/2017(UTC) Posts: 28 Was thanked: 10 time(s) in 6 post(s)
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C#, but this is what we do in Central Control Quote:float logValue = (float)Math.Pow((e.Level * 1000000), 0.25) / 100;
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 1 user thanked joedemax for this useful post.
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Rank: Member
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Joined: 10/21/2020(UTC) Posts: 17 Location: Bulkington Thanks: 5 times
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Originally Posted by: joedemax  C#, but this is what we do in Central Control Quote:float logValue = (float)Math.Pow((e.Level * 1000000), 0.25) / 100;
Thanks Joe, I’ll try and see if I can work it out from this! I fear the biggest issue, is that the log maths function isn’t recognised by vMix! Although I may be using the wrong syntax... programming is certainly down on my list of skills
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Rank: Advanced Member
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Joined: 11/28/2015(UTC)
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1 user thanked pm for this useful post.
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Rank: Member
Groups: Registered
Joined: 10/21/2020(UTC) Posts: 17 Location: Bulkington Thanks: 5 times
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Originally Posted by: pm https://www.vmix.com/knowledgebase/article.aspx/144/vmix-api-audio-levels That’s the puppy!!!... many thanks for this!!
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