How Do I's... SonicPi and SuperCollider control and runtime stuff

[jonnyhotchkiss]

Assigning objects

This is syntactically valid but the object is nil and the loop doesn't run.
Can anything be assigned to a variable, and then controlled?

loop_obj = loop do
  puts 'hey'
end

Now Playing (sound info)

Does SonicPi know when a note or sound is playing?
How to play note/sound if none playing?