Laserharp
For science fesrival we created a laser harp
Here is how to get the software part to run
MIDI libraries for the arduino, used to format midi messages sent to the usb port : https://github.com/FortySevenEffects/arduino_midi_library
On a raspberry, or linux PC, to allow the midi messages to be managed by the system, by creating an ALSA midi port on the raspberry : https://github.com/cjbarnes18/ttymidi/
And then install fluidsynth, a very nice synthesizer capable of playing hundreds of different instruments based upon freely available sound files : http://www.fluidsynth.org/
Here is a typescript:
- sudo apt-get install libasound2-dev
- git clone https://github.com/cjbarnes18/ttymidi.git
- cd ttymidi/
- make
- sudo make install
connect the harp
find the device name
- sudo dmesg
do a test run. Play some notes, the values should be displayed
- ttymidi -s /dev/ttyACM0 -v
Connect the midi device to the synth
- ttymidi -s /dev/ttyACM0 &
- fluidsynth --server --no-shell --audio-driver=pulseaudio --gain=1.0 --reverb=0.42 --chorus=0.42 /usr/share/sounds/sf2/FluidR3_GM.sf2 &
- aconnect -i
- aconnect -o
In the above outputs search for the ttymidi (usually 128) and fluidsynth (usually 129) and connect them together
- aconnect 128 129
Now you can play the harp.
Unsolved issues:
The right 2 lasers are for instrument+ and instrument-, but you can only switch between several times the same instrument and the drumkit.
