Sintes web:
con el teclado del ordenador:
https://midi.city
https://artsexperiments.withgoogle.com/ar-synth/
Un piano roll sencillo:
https://onlinesequencer.net
Piano online:
http://www.taktech.org/takm/WebFMSynth/
Theremin:
https://femurdesign.com/theremin/
https://www.google.com/doodles/clara-rockmores-105th-birthday