How to filtering particular frequency of a sound wave

Hi im a electronics and instrumentation engineering student i only know about labview basics... I need to know about how to filter particular range of frequency or spectrum of sound from an audio signal.... Please tell me

Hi Sentamil,
you should use a suitable filter function. LabVIEW comes with a lot of them!
how to filter particular range of frequency
Thats sounds like you need a bandpass filter…
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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Alright, so first of all I will thank you for clicking this post!
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Since this is not short clips, but a whole song on 2-3 minutes, it's very hard for me to make the lip sync perfect because I have to replay from the beginning in order to hear the music.
So question one is: Are there a way that I can play the movie in the middle and still hear the music?
And so the second question is that I can barely see the sound waves in the Music layer, even though there's lots of music.
Here's a picture of how big the sound waves are:
And that's in the middle of the song!
The problem is not that the music is too low, because it's quite high.
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Feel free to post even if you don't have the answer, so it will stay at the top till someone knows how to fix this!
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There are several ways to make the sound file, or any layer, more prominent in the timeline. In the upper right corner of the timeline window is a contextual menu. In that menu select Large. This will make all of the layers use a larger area in the timeline window. Set the frame rate to higher rate, say 100 or 150 fps. This will stretch the audio, and all of the other content over a larger space in the timeline.
Both of the above will make the audio track easier to see. Add a layer to the timeline and place key frames at points where you need. These will aid you in managing the audio.
I usually cut up the audio file into smaller chunks and place these end to end in the timeline, usually in different layers. The net effect on playback is that the sound plays as expected. On the timeline, I get a short chunk of content to work with. You cannot expect to maintain sync over any extended period of time in Flash, or any application like it. Keep the extent of any given synched section short and run them end to end. The audio and the visual portions of Flash are compiled separately and will be played back separately.

How come I can't see the sound wave in the tracks?

I just got an iMac, and am brand new to this, but I'm stuck here. The tracks are rectangular blocks of sound and I can't get them so they will be sound waves. I feel like I've clicked on every possible option. Any help?

remy trahant wrote:
The tracks
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MIDI loops (green) are not sounds, so there is no waveform, they are merely instructions for a synth. audio loops (blue) will show the waveform.
and I can't get them so they will be sound waves.
if you option drag a MIDI loop from the browser into the timeline, it's pre-rendered audio sample will be used instead and you will see a sound wave.

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frequency Analysis? How do I get frequency characteristics of a signal given in .wav format ?
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Message Edited by Komal Khalid on 04-11-2010 10:59 PM

If you have labview 8.x or 9.x you can do this. Go to help in the toolbar. Select "Find Examples" and then search for sound. Locate the "Sound File to Sound Output.vi" This example will help in your task. Remember that Labview is shipped with a lot of useful examples. That can help you in your learning process
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Detecting frequency of the sound by phone`s microphone

Hello
Please tell me how to detect the frequency od voice/music using phone`s microphone. Is it possible to do it using MMAPI? I want to create universal solution, not just app for specified phone.

it's not necessary to use an FFT. and sometimes is not sufficient:
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a simpler technique:
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I'm doing a program which measures sound and engine speed and then displays it in a colormap.
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Point is, i would like to see at which RPM, the sound is loudest, and at which frequency its loudest. So i cant miss any of those three.
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RPM_speedprofil_digital.vi ‏49 KB

Thanks Ben, but I found a different way. Yours is very good example, but its quite difficult to read the values from it, for my prupose of the program.
I did some deeper research on the internet and did it with help of SVT STFT vs RPM.vi which does some transformations of two waveforms (in my case RPM analog wave, and sound wave), and then indicates a nice colormap with RPM on x-axis, Frequency on y-axis, and color of amplitude on z-axis, just how i wanted. This way it is way easier to read the data from the graph.
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RPM-dB-F.JPG ‏56 KB
code.JPG ‏67 KB

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Hi all!
First I want to thank U for the great job you are doing for this forum.
Iam still busy trying to control a stepper motor, by sending pulses from my E-series 6024 to a compumotor s6- stepper Driver. I've managed to get it working. I desperately need to control the motor using the values from an array. I believe we can use two approaches for that:
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Tiano,
I will try to better explain the paragraph on LabVIEW. The original paragraph reads ...
"While in a loop for continuous pulse train generation, make two calls to Counter Set Attribute.vi to set the values for "pulse spec 1" (constant 14) and "pulse spec 2" (constant 15). Following these calls you would make a call to Counter Control.vi with the control code set to "switch cycle" (constant 7). The attached LabVIEW programs demonstrate this flow."
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How to change the frequency of a finite pulse train?

Hi all? I Know I’ve asked once a similar question, but I need a better answer. I would like some ideas or examples on how to modify the example in LV; "Finite Pulse Train Generation - Intermediate for AM9513-Based Devices",so that the frequency can be changed while the VI is executing.
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Tiano,
I will try to better explain the paragraph on LabVIEW. The original paragraph reads ...
"While in a loop for continuous pulse train generation, make two calls to Counter Set Attribute.vi to set the values for "pulse spec 1" (constant 14) and "pulse spec 2" (constant 15). Following these calls you would make a call to Counter Control.vi with the control code set to "switch cycle" (constant 7). The attached LabVIEW programs demonstrate this flow."
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pec 1" and "pulse spec 2". These two registers are used to configure the frequency and duty cycle of your output frequency.
The example program which is attached to this Knowledge Base demonstrates how to change the frequency of a continuous generation on the fly. Why continuous? Because changing the frequency of a finite train would be easy. When the train completes it's finite generation you would just change the frequency and run a finite train again. You would not care about the time delay due to reconfiguration of the counter.
If you would like to change the frequency of the pulse train using a knob, this functionality will have to be added in the while loop. The while loop will be continuously checking for the new value of the knob and using the knob value to set the pulse specs.
LabVIEW is a language, and as with learning all new languages (spoken or programatic) there is a lot of learning to be accomplished. The great thing is that LabVIEW is much easier than mo
st languages and the learning curve should be much smaller. Don't fret, you'll be an expert before you know it. Especially since you're tackling a challenging first project.
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How to filtering particular frequency of a sound wave

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