So I've got this old passive volume pedal lying around. I haven't used it in many years. Today I decided to use it as an expression pedal, which is something that I am far more likely to use.
The pedal itself uses a very basic setup - a trim pot and the main pot which is controlled by the tilt of the foot. The audio signal usually goes through the pots which adjust the volume.
I made a cable that connects my Arduino board to two 6.5mm mono jacks. The shield of the blue connector goes to ground, the tip of the blue connector goes to 5V, the shield of the red connector goes to ground and the tip of the red connector goes to Analog Input Pin 5.
The red connector is connected to the output of the pedal. The blue connector is connected to the input. The idea is that the volume put acts as a voltage divider. The output is then a voltage between just over 0V and 5V, depending on the tilt of the pedal. This voltage is then read by the Arduino
The Arduino has a very simple sketch, which checks for a change in voltage on its analog voltage, and then sends the data to a Max/MSP patch.
The Max/MSP patch takes the value, which is between 0 and 255, and divides it by two. This value is sent as a MIDI CC value to other programs or devices, such as Ableton Live
I plan on housing the microcontroller etc in the pedal itself, and running actual MIDI hardware from the pedal, so that it doesn't need the Max/MSP patch.
Below you can see a quick demo video of the pedal in action.
I think they must have backlogging issues at the moment. Whenever I have ordered from them previously, they have given much faster turn around times. :S
It's not the price of the shipping (4.20$) but the WAITING. Waiting hurts.
I'm pulling out my mastercard anyways.
Still, Australia needs to move closer, and bring sunshine with it at the same time. And vegemite.
I'm sorry about the price / wait of shipping everyone; there is nothing I can really do about it, and I think that with Kunaki the CDs come out as a very good product considering the price.
I'm not sure what is going on with their international delivery; six weeks seems like an excessive amount of time (it is the same amount of time to ship to Australia too, as Kunaki is Brooklyn based).
Office yoga made easy; hypnosis for the modern age. Music for SEGA Nomad and Atari 2600. Cure yourself with electricity.
Track listing: 1. We Are Eating Our Children 2. Four-Wheel Drive Advertisement 3. Plus One 4. Self Replicating Technology 5. Latitude and Longitude (CD-only track) 6. Microbiology
You can download this release here. You can also purchase a physical copy of this release here. Why would you want to do that? Well, (1) you might like to support what it is that I do (2) it's only $4 plus postage and (3) it contains an extra track.
The artwork contains elements by the Flickr user O'hAodha. Used under license.