Play/Stop sound with sensor Help
Hello,
For an installation, I would like to control the playback of 2 sounds depending to an ultrasonic sensor. When the sensor value is below a certain value a sound play and in the other case an other sound.
I already plug my arduino to Max and I'm able to get the values of the sensor. I send this values to an if condition ( if $f1 < 214 then 1), plug to a toggle, plug to a 1 plug to the playlist. The problem is that when the value of the sensor is below 214 it keep sending play messages and my audio file make a tiny loop...
Have you got an idea to send only 1 play message when the value goes under 214 ? And stop it when it's above the value?
Please I'm really need for help, this is an important project and I don't have much time left...
Thank you anyway and good day
Have you looked at the change object?
That's not directly related to your question, but to share some experiences: ultrasonic distance sensors (at least the cheap ones) are quite tricky to work with. In my experience the tend to change their behavior a lot with the conditions (space, humidity of the air... and they don't work well when people where cloths like woolen sweaters/cardigans (those material absorb the sound). And they tend to produce very noisy data. If you don't need to cover lager distances (not more than about 1 1/2 meters or about 4 feet) you might want to try infrared distance sensors as well. And or apply some smoothing to avoid accidential triggering the sounds....
Hi,
Thank's a lot for responding me so fast ! However, it was my first post so I had to wait the check of my post which takes several hours and meantime I found out the solution...
I manage my problem with the change object with maintain my value and it work fine ! Thank's anyway Gregory, that was exactly that !
And yeah I figure it out with another trial with ultrasonic sensors, but for this one, they're placed beyond a canvas so the value is quite stable, and not so much diffraction !
For now, the next step of my project is to send a color variation for a LED stripe (when we touche the canvas the color must change slowly), I'm on QLC+ but I don't now where to go, should i use MIDI? or OSC? (I'm quite confuse, all the tutorials are not very specifics...)
I guess I'lle have to make another post...
Thank's again guys !