Re: [PD] Relative Db measurement

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@mccormick.cx mailto:chris@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/



_______________________________________________
Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> mailing list
UNSUBSCRIBE and account-management ->
https://lists.puredata.info/listinfo/pd-list

---

Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list