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More => Old Versions => Media Center 16 (Development Ended) => Topic started by: mark_h on July 14, 2011, 11:49:26 am

Title: HELP: math log10 doesn't work with fields?
Post by: mark_h on July 14, 2011, 11:49:26 am

I'm trying to use a math expression with log10 calculations.

I want to turn the Peak Level into a dBFS value, which requires using log10 functions (20*log10(x) where x is the peak level)

I can convert [peak level] into a decimal value using =formatnumber([peak level,0],2), but the log10 function doesn't seem to work with expressions

So, for instance this, works:

=math(20*log10(0.5))

But this doesn't:

=math(20*log10(formatnumber([peak level,0],2))

I've tried breaking things down into calculated fields but that doesn't work either, eg

=math(20*log10([my field]))

Anybody have a solution?

Matt?!

Cheers,

Mark

Title: Re: HELP: math log10 doesn't work with fields?
Post by: MrC on July 14, 2011, 12:17:58 pm

math(20*log10/(formatnumber([peak level,0],2)/))

Title: Re: HELP: math log10 doesn't work with fields?
Post by: mark_h on July 14, 2011, 03:37:53 pm

Brilliant!  Many thanks.