Sneak peek of the wave shape curve

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• Save the wave shape of power spectrum

  Hey labview masters, I need help! I'm developing a labview program to calculate the power of a waveform spectrum injected into a signal acquisition interface 4461. The program gets the fft of the captured signal and return the array of power, as well as background noise spectrum. He is then sent to the host via a TCP connection.

  Everything works fine except that I can't record the signal power spectrum more he sent to the host. I tried to trace all the x / y values via the command waveform.vi in the field, except that I can't add the axis labels.

  Can you tell me how to trace the full spectrum of power, add labels and save it in the pc?

  Thank you guys

  João Matos

  Export image is an Invoke node, not a property node.

  Right-click on the graphic terminal of waveform and select Create > invoke node > export Image.

  Lynn

• Remove the edges tightly curved lines?

  As you can see, the basis of the shape is fluid and curved, but since it is so close and big it creates corners. Is it possible, in addition to expanding the race and curve it manually, to remove the edges? Preference while maintaining the editabiliy of the race.

  

  There should be an anchor at the apex of curves.

  Once you have them is a simple matter to adjust the handles to avoid this kind of ugliness.

• From itunes to an mp3 CD burned on a macbook OSX 10.7.5. The cd plays a sound skreechy in the wave cd player. How can I fix it?

  Burned a cd from itunes to an mp3 on a macbook OSX 10.7.5. The cd plays a sound skreechy in the wave cd player. How can I fix it? The cd will play the mp3 in the macbook. He play the cd or access my itunes music? I burn on CD documents successfully. But I've never burned audio successfully. Please notify. Thank you.

  For problems of audio on a CD (as opposed to combustion problems do not at all), you can often clear up by re-burning at a lower speed.  Use 2 x.  This setting is available in the dialog box burn the disc.

• How do I get this off my departure to the top of the page, what kind of Web do you want? Join the Firefox users around the world, shape its future.

  I googled and upon my departure to the top of page, under Google search space, that question is beneath him.
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• Burning a cd to play on a cd player without using the burner of the wave

  I would like to know if anyone has the issue of burning a cd to play on a cd player without using the burner of the wave.  I have a situation where I wave recorder on a logic 9 Studio Pro disc but I don't want to install it.  I wonder to install any element, because it can cause problems.  I prefer to bounce from the finder, but when I do the cd will not play on a cd only through the computer player.

  Bounce your songs out of logic.

  Make a playlist in iTunes for the songs.

  Burn the playlist to CD.

• The non-linear curve slope

  Hi all

  How can I get the slope of a particular point in the non-linear curve? I use Lev - Mar curve fitting is not linear.  The slope is to determine the dynamic resistance of the current-voltage curve of diode if dynamic resistance = 1/slope. Kindly help...

  
  

• HELP - read file that VI does not stop at the end of the WAV file

  Hello

  I am a beginner and I'm working on a project that opens a .wav file and it plays (with volume control). I found all the associated examples sounds extremely useful and I can just edit the audio file to output.vi his example to my project.

  I'm running into a problem where the vi does not stop at the end of the wav file, and it seems for a while loop. the wav file I am using ended a long min (and it has been converted to a data file in a wav file, if it matters). I have attached my vi modified here and appreciate any help.

  Thank you!

  Christy

  The OP and the æ OR

  Please go to help on the toolbar. Then select examples and search for sound. Locate the sound file "for his Output.vi.

• using THE WAV file encryption

  I'm trying to implement the encryption of the TEA on a WAV for a project.

  XTEA: http://www.ni.com/white-paper/7519/en/

  This TEA.vi requires two unsigned long int as input, and I'm unable to convert the wav to an array of integers. Any suggestions?

  Note: I can create a table of waveforms

  
  

• Equalizer-indicator of the WAV sound file

  Hi all!

  I have a newbie question I am stuck on a stage in the design of an equalizer sound wav.

  The point of my Equalizer must indicate the magnitude of the different frequency ranges, in the form of an equalizer while that listen to you. The wav file playback sound and this is an indication of the greatness (EQs) must be sinhronised. for example: If you hear a bang you also see on the indicators at the same time.

  I can't understand how to set up a loop that would do this.

  Now, I get only first set scale.

  Thanks for the help.

  You must use pieces of the wav file in order to do what you want. Go to help on the toolbar. Select search examples. Search for sound. Then look for the 'file to his \Sound Output.vi' this will give you an idea on how to do things. Be sure to save the example in your personnel file before you do any work on it.

• apply restrictions for the non-linear curve fit

  Hello Forum users,.

  I am currently working on a VI control which is supposed to create a specific model of pressure inside a hollow tube to provide a test environment for pressure sensors. The details are many and complicated, so let's say I am sure that my formula to calculate this profile according to the pressures inside the hollow rings around this tube will work.

  To find the correct pressure for each ring values, I've linked to a model VI containing this form to Lev. - Mar algorithm (the non-linear curve adjustment) and let it run.

  Technically, there is no problem and Lev - Mar find values to adjust the function for the values (not perfectly sure, but close enough).

  The problem is, however, that, since the device, once suitable values for the positioning and size of the rings are found, must be built, the simulated pressure rings perhaps intersect not between them. To apply this rule, I added a check to my VI of model and if the values passed to Lev - Mar breaking the rules, the VI model gives a matrix of zeros to follow him (I tried an empty array, but that only leads to error messages).

  This solution did not work. Lev - Mar seems to ignore these cases always looks for values that break my rules (and if I put these values through my model VI, I get a matrix of zeros, as expected, so the audit seems to work).

  Perhaps I misunderstood the algorithm of Lev - Mar and it does not actually check each possible defined coefficients of finds.

  Is it possible to adapt to any function of a set of values while keeping the predefined boundary conditions?

  Oh, before I forget:

  I use LabVIEW version 8.2 in the Institute, because the workshop systems is not installed 8.5 for some reason any.

  Thanks in advance

  Thaliur

  Hi Thaliur,

  Thanks for posting on our forums.

  I understand your request you expect the algorithm to ignore a case to all zeros in the table. However, it is not implemented like this.

  Good news is, its source code can be edited and you could save your own personalized version of the algorithm of screws it is to you that you just add a check for a matrix of zeros or simply pass another parameter which indicates only a case of "broken rules". Then you would not have to continue the calculation.

  If I misunderstood your question, please clarify this. You can also post a code for further explanation, if you wish.

  Good luck with the project!

  Peter

• reconstitution of the wave

  Hello

  I use a wave generator to simulate a wave of 200 Hz and a capture card OR used to acquire the signal.

  I think according to the Nyquist theorem, I must acquire at least 2 x the frequency of the wave.

  I am thus, acquire, in samples keep, to 1000 Hz. I checked for a different number of samples and only 20 seemed ok for the reconstitution of the wave in excel.

  When I try to simultaneously acquire two waves, (the two 200 Hz) I can't manage...

  I am not very confident to acquiring high-frequency...

  Hope someone can help me

  I have attached my vi

  Thanks in advance

  
  

• Part of the wave in different colors

  Hello world

  Hope everyone is doing well. I have a little problem, I detect the valleies and the crests of the waves, I want the portion which is top or Valley to be in a different color so that the user can clearly see them.

  I use waveform graph. I enclose a photo, in that I circled the part I want to be a different color.

  can anyone help?

  RGS

  Omar

  The answer has been given above.  Here he photo and VI form (version 8.6.1), alternately colored cycles of a sinusoid.

  

  This method has the disadvantage of requiring a full set of data for each color you want to trace.  Alternatively, you can break your waveform in different pieces and ground to them as separate parcels, making sure that you set the timestamps correctly.  To do this, you will need to set the chart so that it uses the timestamps.  Click with the right button on the plot of the graph area and uncheck Ignore Time Stamp.  This will put your x-axis in times of formatting.  Click with the right button on the x axis, and then select formatting....  Choose the desired formatting, and you should be good.

• How can I set the default volume for the sound level of the wave in Windows XP

  When I start or restart my computer running Windows XP Professional, the wave volume goes up to the max level.  This happens even if I set the volume to a level very low.  The volume control shows 'SoundMAX Digital Audio' at the bottom.

  I guess I could figure out how to do; However, it seems that it would be disabling applications and not answering is not to reason the volume resets to max level on boot-up the top.

• Huge problem, cannot delete the WAV file.

  I have the WAV file on my desktop that I can't move, delete, rename or the properties view.  It is a way by using 100% of my CPU and slow down at all.

  Whenever I try to delete it, it says "preparing to recycle...". "and never finished.

  I'm about to reinstall my operating system because I don't know any other solution.

  Hello

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  I hope this helps.

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