How to change the frequency of tracks in multitrack session?

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• How to change the frequency of images for an Actionscript program?

  Hello
  
  I read that the Timer() calls accuracy depend on the frame rate of the movie, they play in (which makes sense because they are Flash, after all!). I'm working on a project in pure ActionScript 3.0 and I wonder how I change the pace of this project, I don't mind to increase it to about 50 fps so the Timer() calls can be pretty accurate.
  
  The base class, it is executable, currently in this project is an extension of the Sprite, but that could change if necessary.
  
  Thanks in advance!
  
  David
  

  It is the Stage.frameRate property. You must Access the scene via a DisplayObject. There is also a compiler option: by default-frame-rate

• How to change the frequency of sampling DAQmx during execution?

  Hello guys. I'm using LabVIEW in the measures of the frequency response function. My application requires the sampling rate to change according to the frequency of the signal during execution.

  I tried to do it with a "structure of the event" and it works well when I change the rate manually via the front control but it backs do not work when I set up the sampling frequency to vary automatically (just a frequency sweep). Photos below:

  Why not the structure of the event feels the change in the value of "rate"?

  Thanks in advance for your help.

  Lucas

  Hello

  In "automatic mode" to change the sampling rate, the calculated rate is written in the local variable (as illustrated in the code).  Structure of the event does not change value in the local variable as an event.

  In order to make the structure of the event to recognize the change in value of an indicator such as event: write the new value to the property "Value (Sgnl)" corrosponding node to rate indicator (see figure below).  This will make the structure of the event accept the value change in the indicator as event.

  Note: Use architectures such as producers and consumers for such applications, which makes the application readable and expandable.

  See rear queries if any.

  

• Change the frequency AO AO DC voltage scanning scan?

  Hi all

  I am very new to labview, but find the forums and examples extremely helpful. I probably spend 50 + hours to familiarize myself with tutorials and general information, but I am at a point where I need your help.

  I'm unable to change the example "AO frequency sweep" found here (see custom_sweep_1.VI) to allow me to sweep the voltage.  My instinct is that I don't need of the ' waveform buffer generation VI ' and that I should be able to remove the associated entries since I'm only interested in a sweep of DC voltage. It is also called create_log_frequencies.VI, and I'm fairly certain that I can use it as written and simply change "frequency", "tension". My work of the custom_sweep_1 changes are attached as custom_sweep_Voltage.

  The problems I am having with the edition of custom_sweep_1 are:

  (1) I don't think I understand very well how or if the parameters associated with waveform buffer generation VI relate to a sweep of DC voltage.

  (2) an extension of 1): the loop depends on the samples and Cycles by buffer and I don't know how / whether to replace these values

  (3) the .VI DAQmx Timing (sample clock) receives its sampling frequency of output waveform buffer generation VI, but I think I can use 1/scan time to replace this (?)

  (4) the DAQmx Write.VI gets waveform buffer generation data, but if I can get around this VI and AO tension of wire directly to write DAQmx then I think I can use minimum voltage as my entry of data (?)

  (5) after the implementation of these changes, the custom_sweep_Voltage runs, but I get error 200609:

  "The possible reasons:

  Generation cannot be started because the size of the selected buffer is too small.

  Increase the size of the buffer.

  Choose the size of the buffer: 1
  Minimum required buffer size: 2

  "Task name: _unnamedTask<3A>"

  I also note that I tried other ways to create the sweep of voltage DC VI:

  (1) I have tried change the tracer IV example (found here), but it's much more confused than change the frequency sweep.

  ( This tutorial and sample 2) block diagram looks like straighforward, and I also work on understanding what Assistants DAQ 1,2, 3.

  Any return would be great. I think it is clear that at the very least, my poor understanding of 'buffer' is if the cause of my confusion about the change of frequency scan, please do not hesitate to share any information you have.

  Thank you very much for the help,

  -Esperanza

  Additional information on my project/progress using labview follows below:

  My final goal is to determine whether or not the resistivity of a sample of organic driver changes over time. For this I want to compose a VI simultaneously sweeping the output voltage DC-5 to 5V periodically during 24 hours and measure the voltage drops to my load resistance (to determine the current in the circuit) and the sample. I use a USB 6259 DAQmx and that you have correctly configured my circuit. I work two screws that I created with the DAQ assistant and by changing some of the examples, I found online. Output voltage (of an AO) but I have to manually select the voltage value. The second reads voltages in three samples of interest and writes the data to a PDM file. If you've read this extreme sensation and still make a contribution, my next goal after finding how to sweep the voltage is to combine this with my VI measure VI. I think it will be relatively simple, but still, I rejoice in all your comments!

  I solved this problem. I have changed my approach to be similar to the last link in my post. AO frequency scan approach is much more complicated that I need. Thanks for the help.

  -Esperanza

• How to change the chart of FFT Power spectrum

  Hi all

  Could someone help me in Labview? I got a result as shown in Figure 1. However, I want the graph to resemble Figure 2 that we can define the range of frequencies for each channel in the y-axis and maintain the amplitude for the x axis.

  How to change the chart?

  Figure 1

  

  Figure 2

  I have the range of frequencies for each channel, which are:

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  Channel	Frequencies
  Channel 1	2401-2423
  Channel 2	2404-2428
  Channel 3	2411-2433
  Channel 4	2416-2438
  Channel 5	2421-2443
  Channel 6	2426-2448
  Channel 7	2431-2453
  Channel 8	2436-2458
  Channel 9	2441-2463
  Channel 10	2446-2468
  Channel 11	2451-2473

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  Your answer is really appreciated.

  Thanks & best regards.

  
  

• Change the frequency of the antenna

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  I hope I can get a quick answer on this forum with an understandable explanation...

  I have a wireless router that runs on 802.11, and I'm trying to change the frequency at which it runs on. I'm sure this is possible, but I didn't really know how this can be done.

  Change the frequency would be easier than to change the antenna, or should a work be done on the circuit board. I realize it may void my warranty, but it is a computer science for my school project.

  Can I leave the router alone completely and just mess with the firmware in a sort of way?

  You mean regional wireless network?

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• How to change the color of pre-rendered screen.

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