iggering sounds based on user input then you can give a two-value <code>times</code> array and
                  only the attack, delay, and sustain portions of the envelope will be produced. You'll then need to use one of
                  the other ramping functions to terminate the envelope when appropriate â€“ remembering to set <code>from_now:
                  true</code> or the ramps will be calculated beginning at the previously scheduled event instead of the time
                  you call<cod