PURE DATA forum~
...that deal with pure data
You are not logged in.
#1 2010-03-01 23:07:48
- halflifebe
- Member
A simple way to make a VU meter?
Hi everyone,
I would like to cotrol the output level of my patch.
I've try to use the VU (in the "put" menu) but I don't understand how it works.... :(
Is there a way to get my audio in this VU?
Thanks
Offline
#2 2010-03-01 23:22:38
- slur
- Member
Re: A simple way to make a VU meter?
go to help->browser
answer is you need a *~, something to give it a value and a dac~
pd redefining mathematics |expr fact(0)|==0
Offline
#3 2010-03-02 05:56:54
- Maelstorm
- Administrator
Re: A simple way to make a VU meter?
The [vu] only accepts messages, so you need use [env~] to get the rms dB level, then rescale it. [env~] uses 100 dB to represent full scale, but [vu] uses 0 dB.
Accurate peak metering is pretty bitchy, and I'm not aware of an external that does it well, but you can at least use [edge~] to detect if it's clipping.
[expr~ abs($v1)>1]
|
[edge~]
|
[bng] <-- will bang when out of -1 to 1 range
Last edited by Maelstorm (2010-03-02 05:57:11)
.mmb
Offline
#4 2010-03-02 12:50:07
- slur
- Member
Re: A simple way to make a VU meter?
oh i thought he just wanted a volume control
interestingly there isn't even a help patch for edge~
pd redefining mathematics |expr fact(0)|==0
Offline
#5 2010-03-02 17:45:18
- Maelstorm
- Administrator
Re: A simple way to make a VU meter?
I made one a while back.
http://puredata.hurleur.com/viewtopic.p … 002#p15002
.mmb
Offline
#6 2010-03-03 23:37:36
- halflifebe
- Member
Re: A simple way to make a VU meter?
Ok thanks I've made one but I think I didn't rescale the output of the env~ correctly...
Here's my patch. Is it OK?
Offline
#7 2010-03-03 23:56:52
- slur
- Member
Re: A simple way to make a VU meter?
so what about my quick idea?
but as mmb stated that's not accurate because of env~
Last edited by slur (2010-03-04 00:18:40)
pd redefining mathematics |expr fact(0)|==0
Offline
#8 2010-03-04 00:33:06
- ledhed2222
- Member
Re: A simple way to make a VU meter?
I've done this before without too much headache, and I don't see any problem with it.
(If you have more than output) connect all of your outputs to a [+~] object, connect this to a [env~] object, then to a [- 100] object, then to a number atom, finally send the output of the number atom to your VU meter.
Offline
#9 2010-03-04 00:53:40
- ledhed2222
- Member
Re: A simple way to make a VU meter?
I just took a look at that thing, your code should work (and you don't need a [+~] obj). To make it look pretty, switch the [- 100] and number objects, then do a send from the number atom to the VU meter so that you don't see a patch cord going into the meter.
Offline