A bit embarrassing, cause this shows how little i actually know about sound, but i was wondering how i could recreate the main pd level meters like in the main pd window.

I guess it has something to do with [env~] and some [dbto...] object, but i just can't figure it out. Maybe i could ask in 1 go how you actually use the [vu] object?

Thx,

Domien

Hi mate

You're almost there -

feed a signal into [env~] and feed that into [- 100] and patch that into the left inlet of the [vu]

Is this how you mean?

S

Well, yes and no. When i output a simple [osc~ 440] multiplied by a volume slider ranging from 0 to 1 and connect that like you said, the [env~] value is about 96.98 while the pd peak meter gives me 100. Why is there more or less 3.02 missing?

And is just adding that number to the [env~] output equal to the pd output?

D.

It shows the RMS amplitude which is about 3dB down on the peak-to-peak amplitude. The output meters show the peak amplitude, because this is important to avoid overs (digital clipping).

Try it with a square wave and see the difference. The average of a sine wave with the same peak amplitude is less.

So, [env~] together with [dbtorms] gives me rms. But i also want to have the peak amplitude. How do i get that out of a signal?

here's my construct for finding the peak number in a stream..bit hard to draw in ascii, so explaining:

attach the right outlet of moses to the left inlet of a trigger. attach the outlet of the float to the right inlet of the moses

like this:

[inlet]
|
[moses]x[t f f]
|
[outlet]

now, for a signal you want this to zero itself after n seconds, so add a [line] object in there:

[inlet]
|
| [r moses-inlet]
| |
[moses]
|
[$1, 0 444 (
|
[line]
|
[t f f]
| |
|
|
[outlet peak]

of course, there might be an easy way to do what you want...

Ok, i think i understand what you're doing here. But what do i connect to that inlet. An [unsig~] followed by an [abs] or an [abs~] followed by an [unsig~] or something completely different?

no, ignore what i said. it doesn't work properly anyway

good news is there is a [peakenv~] object in iemlib that does exactly what you want. (and you don't want to know how long i just spent looking for it!)

so:

[inlet~]
|
[peakenv~ 10000] <- argument sets time for env to re-zero
|
[env~]
|
[- 100]
|
[vu-meter]

i just tested that, and it DOES indeed work.

phew!

^
actually, [peakenv~ 1000] is probably more reasonable

Alright, many thanx hardoff. Now i can finally minimize the main pd window and implement the peak detection in my own main window.