adsr - Hold a note in Live Coding Environement?

Hello First of all- What an amazing project! I like it very much, I want to learn it and possibly even contribute to it in the future. As first issue.. I have not been able to use the ADSR node. (also it's not documented, and I haven't found any example). Could you provide an example of a code that produces sound? (Eg this one doesn't ~env: imp 1.0 >> adsr 1 10 10 1 o: sin 200 >> mul ~env >> mul 50 ) Thank you very much!