Create a beep at specific intervals

Question

Hello,
I was only introduced to LabView today and must create a program that will produce a beep sound at (random) intervals and then repeat the cycle for a behavioral experiment I am conducting.
In other words, I have to create something with the following trial pattern: 3s silence, 1s beep, 2s silence, 1s beep, 5s silence, 1s beep (repeat cycle).
I got as far adding the beep.vi and making the necessary adjustments according to this tutorial: http://www.ehow.com/how_12122458_create-sound-numbers-labview.html
but another issue I came across is the lack of synchronization between the Boolean function and the sound production from the beep (It will continue to beep after pressing "stop"). Additionally, changing the frequency values did not change its tone...and a single beep.v's frequency would not be adjustable for the trial pattern I have mentioned above.
I would greatly appreciate any help (visuals would be much appreciated as well). I am a complete newbie to programming and my ineptitude has been stressing me out all day.
Thank you!!!!

Answer 1

Hi unevolved,
Sorry, I forgot to add another question. May I ask what LabVIEW version that you are running on?
Based on what you mention on the first point: following trial pattern: 3s silence, 1s beep, 2s silence, 1s beep, 5s silence, 1s beep (repeat cycle), I believe you'll need to use something like a state machine. I believe this might explain about state machines: http://www.ni.com/white-paper/7595/en/ and http://www.youtube.com/watch?v=JyJxNrgABsI.
I have created a rough program based on your cycles. The below screenshot is what i can think of based on your requirements. Presuming that you have read about the state machines from the link I have provided, I'll explain the code   
Basically, I have created 3 states, cycle 1 (3s silence, 1s beep), cycle 2 (2s silence, 1s beep) and cycle 3 (5s silence, 1s beep). First and foremost, you'll need to create a basic state machine structure which consists of a enum (with the state names - http://labviewwiki.org/Enumerated_type), while loop, shift registers (which passes the value from the current iteration to the next) and case structure (each with their own state). 
As you can see, I have a main case structure which controls if the loop operation and within it is the nested case structure which is the state machine itself. For each case, I have an array of enums (which I have specified the names to be Silence and Beep) and a for loop which contains the case structure which does both silence and beep.
As you noticed that the for loop has a indexing tunnel. This allows the for loop to run 2 iterations. On the first iteration, the 1st index array: Silence will be as an input for the case structure and executes Silence case state. On the second iteration, the second index array: Beep will execute the Beep case state.
The below is the silence state for the 1st for loop iteration:
The below is the beep state for the 2nd for loop iteration:
For Silence, I have used wait(ms) to provide the pause before it goes to the next state "beep".
The whole operation will basically repeats from Cycle1 -> Cycle2 -> Cycle3 until you hit the stop button. If you hit the stop button, the main case structure will be as below:
Which should stop the while loop. 
Hope it helps.
Warmest regards,
Lennard.C
Learning new things everyday...