Measure of time elapsed

[rmhughes]

I've just started using LabView and I'm working on a project in which a sound file needs to be played once a microphone picks up a sound with a frequency above a certain level (I have a sound board right now that allows me to manually make these cues). I'm sure I'll have many more questions in the future, but for right now I was just wondering how I could measure how much time it takes for LabView to read the frequency and then play the file.

[lvABC · Accepted solution]

You can get start time and end time by using Tick Count (ms) Function or Get Date/Time In Seconds Function.

Hope it helps!

[rmhughes]

I tried a similar setup on one of the templates but I got everything from 2.3 ms up to 109 ms. What are you using to break up the steps in that example?

[rmhughes]

Scratch the above question, I found it. When I try and play any .wav file it tells me that LabView does not support the sound format.

[rmhughes]

Sorry I'm being that annoying new guy in the forum who just posts questions as he thinks of them and doesn't bother doing work. I figured out the issue and everything seems to be working. I'm consistently getting readings of around 330 ms. Does that seem correct? Seemed a bit slow to me.

Also, out of curiousity, what is that item you're putting the final value into at the end of the process? I've just been using a numeric indicator.

Message Edited by rmhughes on 07-14-2009 02:40 PM

[lvABC]

No worries 🙂

Check an example here for playing wave file.

also find attached files.

Message Edited by lvABC on 07-14-2009 03:42 PM

[rmhughes]

Thanks for all the help!

[BenYL]

lvABC - I like your method of measuring time elapsed. How would this be done with Labview RT? The TickCount block only returns time in msec.

[lvABC]

BenYL,

One quick way to get time output would be by using shift register.

[JÞB]

Also- check out the elapsed time function on the timing pallate-