# A Few Minutes with BEAP, Part 4

In Part 4 of the "A Few Minutes with BEAP" tutorial series, we explore how the ADSR and AHD envelopes work and why you would choose one over the other.
All the tutorials in this series:Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7, Part 8, Part 9, Part 10, Part 11, Part 12, and Part 13.

• Dec 09 2015 | 3:25 am
Extra trick: the AHD envelope can also have its times controlled via CV. The standard for this is 1V/10x, meaning that for every additional volt, the envelope gets ten times longer. For example, if you set the decay time to 100 and then send in a value in the range +/- 1 (e.g. from cycle~ 0.1) to the decay CV input the decay times will be scaled from 10 to 1000 ms.
This also allows you to make really long envelopes simply by adding more volts to the input. Need a ten minute decay? (600 sec = 600,000 ms) Set the decay to 600 ms, then connect a sig~ 3 into the decay input. (10^3 = 1000)
• Dec 09 2015 | 3:54 am
Very useful..
• Dec 23 2015 | 3:16 pm
I love these videos -- thanks so much, Darwin!