[PD] Relative Db measurement

[Chris McCormick]

Hi,

Thanks Alexandre this equation was exactly what I needed for my 
purposes. I also didn't realize the output from `env~` is Db already, 
thanks all!

Cheers,

Chris.


On 4/11/23 4:28 pm, Alexandre Torres Porres wrote:
> I don't think I get it, but the value change in the multiplier would be 
> a ratio. Say you go from 0.5 to 1, that's like multiplying it by 2, so 
> you have to convert this ratio to a dB change, formula is db = 
> log10(ratio) * 20, and a ratio of 2 is a 6.0206 dB increase.
> 
> Em sáb., 4 de nov. de 2023 às 05:15, Chris McCormick <chris at mccormick.cx 
> <mailto:chris at mccormick.cx>> escreveu:
> 
>     Hi,
> 
>     Hopefully this elementary audio question is not too stupid.
> 
>     If I have some signal source how I can I measure the relative change in
>     Db when some change is made to the signal? E.g. if I have an [osc~ 440]
>     going into a [*~] and I change the multiplier, how can I measure the
>     output from that and determine relative change in Db when I change the
>     multiple?
> 
>     Also does this even make sense on Db scale?
> 
>     Thank you!
> 
>     Cheers,
> 
>     Chris.
> 
> 
>     -- 
>     https://mccormick.cx/
> 
> 
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