Need help with VI

[UCF_Michelle]

Hello!

So I am in search of some guidance. I have a labview code in which I have it generate a sine wave frequency sweep with the increment of frequencies and duration per frequency I set it to. I now need the code to still perform the same task, but I need to be able to turn off the sound for a desired duration which can vary between frequencies and start again where it left off. For example, if i have a sweep from 200 hz to 260 hz with an increment of 5 hz, I want to be able to play the 200 hz frequency for a second, stop the frequency for a second and then play the next frequency in this case 205 for a second, stop it for a second and repeat this until it reaches 260. 

Can anyone help me with this? I have attach my VI. The Vi is somewhat all over the place, but it basically generates the sine wave and then records data that I capture using microphones. 

Thanks in advance for the help. 

[Yamaeda]

If you generate the signal as 1 sec (which it looks like you're doing), you only need to add a 2sec wait in the playing loop, then it'll play for 1 sec and be silent for 1.

/Y

[crossrulz]

My thought was that you could just append a waveform that is just 0 for the 1 second (use Initialize Array with the needed number of samples, unbundle the Y out of the waveform, append the new array, write back into the Y for the waveform and then write that to the sound card).

Additional thought:

You only need 1 queue to send data to the logging loop.  Just make the data type a 2D array.  The From DDT should be configured to output a 2D array and that can be enqueued directly.

[UCF_Michelle]

I tried that but the wait only happens in the beginning not between the frequencies. 

Thanks 

[crossrulz]

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@UCF_Michelle wrote:

I tried that but the wait only happens in the beginning not between the frequencies.

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Which "that" did you try?  Can you share your code so we can possibly see if you did something wrong?

[UCF_Michelle]

I tried adding a wait delay in the section of my code to have the sound play for a second and stop for a second but that did not work. I need to be able to play the frequency of my preference for a desired amount of time, stop the frequency, again for a desired time and play the next frequency repeating the same loop. I also need to make sure although the sound is not playing, my DAQ is still capture data. So basically, I am interested in capturing the decay rate of different frequencies. I attached my code for reference. 

Thank You 

[crossrulz]

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@UCF_Michelle wrote:

I tried adding a wait delay in the section of my code to have the sound play for a second and stop for a second but that did not work.

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Your wait is after the loop.  That is not going to work for you.

Move your DAQ into a separate loop that can run in parallel with your generation loop.  Then move your wait to be inside of your generation loop.