Extract time domain info from .wav file

hi,
I'm new to Labview. I want to :
read  (an audio file) .wav file  and extract the time and frequency domain information from it.
Pls can anyone guide me to do this task
Thanks in advance

Run this VI, wait till the end of the song and have a look at the diagram. You'll find interesting examples to use a Wav file.
Hope this help you.
PS : this vi was posted by chilly charly he is the one to thank
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"
Attachments:
Congrats tBob and friends.vi ‏378 KB

Similar Messages

  • How to determine time value of a .wav file in real time as it plays?

    Hi all.
    I need to build a vi in which a .wav sound file is represented in a Waveform graph, and at the same time, I want to play that file, and have a vertical cursor line running along the Waveform graph, in order to have a visual representation of where the sound track is, in terms of time.
    Making the .wav file to appear graphicaly on a Waveform graph was an easy task to do, but then, I was´nt able to extract the time information of that .wav file, at the same time that this file is being played.
    This is a very common situation in music players, video players etc, where some kind of graphical artifact, represents in real time where the track is while it plays.

    Hi, this is the first ActiveX control I have played with but its really cool.
    I read this first: -
    http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmplay10/mmp_sdk/iwmpcontrolsinterface.asp
    Which covers "The IWMPControls interface provides a way to manipulate the playback of a media item."
    Then built the attached sample.
    It should now be straight forward to attach the position information shown to a graph control cursor postion.
    You will need to set a file of your own choosing in the VI first.
    Let us all know if this is what you wanted.
    Attachments:
    mediaplayer current play position demo.vi ‏39 KB

  • TS3771 Why can't I select "get info" from the file area so I can change the setting to "open in 32-bit mode" ?

    Why can't I select "get info" from the file area so I can change the setting to "open in 32-bit mode" ?

    It may be because of your settings. You can modify that setting in System Preferences > Trackpad. Another way of making right-click is to click the app icon while holding the Control key

  • HT4437 how may I add files to time capsule apart from backup files?

    how may I add files to time capsule apart from backup files?
    I'm able to perform backup (time machine). May I add pictures, texts, movies...?
    Thanks

    not sure if this is a spc. appletv question or if you posted it in the wrong forum but there is no way
    for an appletv to access files directly from an time capsule it can only! access a shared lib from itunes from a computer running and running itunes

  • Noise reduction from wav file

    hi all,
    I want to remove noise from wav file . right now i am using free "Wavepad software" for reduce the noise using Auto spectral subtraction. how can i do this by java.
    can some one help me ..............

    Does this apply to your previous question of converting your DAT file to a wav?
    If so, just run the "auto spectral subtraction" algorithm on your DAT file entries before you convert them to a WAV file...

  • How to extract the red layer from BayerRG8 file with VBAI?

    Dear readers,
    We're currentely trying to build a inspection program using a CVS and two cameras.
    A first question to help us: How can we extract the red layer from a Bayer RG8 image?
    To illustrate a lit bit more: lets take a picture of chilis and tomatoes plants. We would like to extract the red color of the picture to know where the vegetable are and if they are eatable.
    So, in a first time, we just want to see the red layer of the picture.
    On a second step, we would like to extract the poistion of the red areas and rank them according to intensities and store all the relevant data in a .txt file.
    Thank in advance for the time you will spend on that topic.
    Regards

    Maybe including a picture with the info you want would help. It sounds like you could use a detect object step (which works with color images), and you could get the position of all red objects. I would also recommend using the Hue plane instead of the Red plane to look for color since this is more robust to lighting changes. Once you have the bounding box for each red object, you can create a programmatic ROI around it and use the Measure Color step to get detailed color information about your reb objects. Here's a sample inspection that uses colored candy to give you an example of what I'm suggesting. Let us know if more specifically what you are looking for if this doesn't help. The example is in VBAI 2012. Let us know what version of VBAI you are using because this may affect what functionality you can use.
    Thanks,
    Brad
    Attachments:
    Color Example.zip ‏358 KB

  • How to extract the Title info from multiple PDFs

    Is there a utility or some program that will extract the Title info (located in the Title field under the Description tab from Document Properties)? I have hundreds of PDFs that I would like to be able to have extracted into some txt file or excel file. Any ideas? Thanks!

    I was working on something similar but haven't had time to fully develop it.
    My idea was to use an envelope detector (low pass filter) and then use an energy detection VI on the envelope.
    Here's where I left off
    Anthony F.
    Product Marketing Engineer
    National Instruments
    Attachments:
    test.vi ‏331 KB

  • Extracting JPEG preview image from DNG file

    My company is using the DNG SDK to support raw or DNG files for users of our digital asset management software. We extract a jpeg preview/thumbnail from ALL file types we support.
    My question is: how can we extract a jpeg preview from a DNG file, using the latest version of the DNG SDK?
    Currently, our software uses the SDK to read a DNG file and write a tiff file, and passes the tiff to imagemagick to get a resized jpeg we can use for a preview or thumbnail.
    When we extract the tiff from the customer's file, we get a base version of the image that does not show subsequent colour adjustments made in (eg) CS3; the customer would like to get a preview that shows (especially) the colour adjustments that have been made.
    I know the jpeg preview exists inside the DNG, I used exiftools to extract it,and it does show the colour adjustments made.
    How do I get that preview image out of the DNG file using the DNG SDK? Does the DNG SDK support that operation?
    The SDK has a lot of API, but not much documentation or samples to show usage.
    Thanks for any help anyone can provide.

    Maybe it isn't the smartest way, but this should work:<br /><br />... call info.Parse (host, stream) etc here - the usual stuff<br />{<br />     // find biggest jpeg image for preview<br />     unsigned int subMaxW=0;<br />     int subMaxI=-1;<br />     for(unsigned int i=0;i<info.fIFDCount;i++)<br />     {<br />          dng_ifd* pIFD=info.fIFD[i].Get();<br />          if (ccJPEG==pIFD->fCompression && 1==pIFD->fNewSubFileType)<br />          {<br />               if (pIFD->fImageWidth>subMaxW)<br />               {<br />                    subMaxW=pIFD->fImageWidth;<br />                    subMaxI=i;<br />               }<br />          }<br />     }<br />     if (subMaxI>=0) // load desired jpeg preview<br />     {<br />          unsigned int i=subMaxI;<br /><br />          dng_ifd* pIFD=info.fIFD[i].Get();<br />          if (ccJPEG==pIFD->fCompression && 1==pIFD->fNewSubFileType)<br />          {<br />               // seek to pIFD->fTileOffset[0] and load jpeg<br />          }               <br />     }<br />}

  • Read and write info from/to file available at client side.

    Hi,
    I have some table name in one CSV file at client side.
    once you get list of tables name from input CSV file at client side.
    Need to run one query to know total rows and size of table in MB , this i need to repeat for all tables which i got from input file.
    finally write 'table name | total rows | size of table in MB' whole info in another CSV file at client side. this output CSV file name will contain timestamp.
    Please guide me in detail how to read and write file avail at client side.
    I am using sql developer at client side.
    version : oracle11g
    Thanks in advance.

    This is a simple SQL question and this forum is for SQLDEveloper, however, this is a question for our SQL*Plus support which can help with this.
    clear SCREEN
    set FEEDBACK off
    set head off
    --Gather stats to populate rownums and avg length of rows.
    --These are not exact sizes (obviously) but you get the idea.
    begin
    dbms_stats.gather_schema_stats ('<YOUR_SCHEMA');
    end;
    select TABLE_NAME||','||NUM_ROWS||','||ROUND((NUM_ROWS*AVG_ROW_LEN)/(1024*1024)) CSV
    from USER_TABLES
    where num_rows is not null order by num_rows desc;

  • SQL Query taking longer time as seen from Trace file

    Below Query Execution timings:
    Any help will be benefitial as its affecting business needs.
    SELECT MATERIAL_DETAIL_ID
    FROM
    GME_MATERIAL_DETAILS WHERE BATCH_ID = :B1 FOR UPDATE OF ACTUAL_QTY NOWAIT
    call count cpu elapsed disk query current rows
    Parse 1 0.00 0.70 0 0 0 0
    Execute 2256 8100.00 24033.51 627 12298 31739 0
    Fetch 2256 900.00 949.82 0 12187 0 30547
    total 4513 9000.00 24984.03 627 24485 31739 30547
    Thanks and Regards

    Thanks Buddy.
    Data Collected from Trace file:
    SELECT STEP_CLOSE_DATE
    FROM
    GME_BATCH_STEPS WHERE BATCH_ID
    IN (SELECT
    DISTINCT BATCH_ID FROM
    GME_MATERIAL_DETAILS START WITH BATCH_ID = :B2 CONNECT BY PRIOR PHANTOM_ID=BATCH_ID)
    AND NVL(STEP_CLOSE_DATE, :B1) > :B1
    call count cpu elapsed disk query current rows
    Parse 1 0.00 0.54 0 0 0 0
    Execute 2256 800.00 1120.32 0 0 0 0
    Fetch 2256 9100.00 13551.45 396 77718 0 0
    total 4513 9900.00 14672.31 396 77718 0 0
    Misses in library cache during parse: 0
    Optimizer goal: CHOOSE
    Parsing user id: 66 (recursive depth: 1)
    Rows Row Source Operation
    0 TABLE ACCESS BY INDEX ROWID GME_BATCH_STEPS
    13160 NESTED LOOPS
    6518 VIEW
    6518 SORT UNIQUE
    53736 CONNECT BY WITH FILTERING
    30547 NESTED LOOPS
    30547 INDEX RANGE SCAN GME_MATERIAL_DETAILS_U1 (object id 146151)
    30547 TABLE ACCESS BY USER ROWID GME_MATERIAL_DETAILS
    23189 NESTED LOOPS
    53736 BUFFER SORT
    53736 CONNECT BY PUMP
    23189 TABLE ACCESS BY INDEX ROWID GME_MATERIAL_DETAILS
    23189 INDEX RANGE SCAN GME_MATERIAL_DETAILS_U1 (object id 146151)
    4386 INDEX RANGE SCAN GME_BATCH_STEPS_U1 (object id 146144)
    In the Package there are lots of SQL Statements using CONNECT BY CLAUSE.
    Does the use of CONNECT BY Clause degrades performance?
    As you can see the Rows Section is 0 but the Query and elapsed time is taking longer
    Regards

  • Audio CD iso from wav files on the shell

    I googled around for this but haven't found a solution.  I want to take a directory of wav files and write them to an iso file that can be burned off to a CD (a functional audio CD) at a later time.  Closest I found is using /usr/bin/genisoimage but it doesn't make an audio CD image, rather, just a data iso.
    genisoimage -o test.iso ./music/*.wav

    graysky,
    this is how a simplified single process script could look like:
    #!/usr/bin/python
    import os
    # Grab all subdirectories within the current directory
    search_sub ="find ./* -type d"
    dirlist = []
    for subdir in os.popen (search_sub):
    dirlist.append(os.getcwd() + subdir[1:-1] + '/')
    for cur_dir in dirlist:
    os.chdir (cur_dir)
    os.popen ("shntool cue *.flac > foo.cue")
    os.popen ("shntool join *.flac")
    You might want to give it a shot at a trial copy of your audio directories.
    Edit:
    A quick prototype for multiple encoding processes:
    #!/usr/bin/python
    import os
    import multiprocessing
    def bincue ():
    while not q.empty():
    cur_dir = q.get()
    os.chdir (cur_dir)
    os.popen ("shntool cue *.flac > foo.cue")
    os.popen ("shntool join *.flac")
    # Init Queue for found sudirectories
    q = multiprocessing.Queue()
    # Grab all subdirectories within the current directory
    search_sub ="find ./* -type d"
    for subdir in os.popen (search_sub):
    q.put (os.getcwd() + subdir[1:-1] + '/')
    cores=multiprocessing.cpu_count()
    for i in range (cores):
    process = multiprocessing.Process(target=bincue, args=())
    process.start()
    Last edited by Darksoul71 (2012-07-05 14:47:54)

  • Create AAC from Wav file doesn't work

    I've converted many WAV files to AAC and it worked fine.  The last few times I've tried it it isn't working.  I hear the bleep which I think indicates it's been converted but I can't find it anywhere so assume it didn't happen. 
    I have Windows XP.  I am running iTunes  10.3.1.55
    Any ideas would be appreciated.
    Thanks,
    Ginny

    Hello,
    thank you for your Help.
    But I just want to read a Binary File, which is build by another program. And this is coded with 8Bit (like a normal Binary File) and not just with 7Bit (ASCII). So the workaround doesn't work in my case.
    I posted the Test-VI in my first post (here once again as picture). And it works fine on the PC, but if I try it on my MCB2400 the "Read Form Binary File" Node doesn't work.
    And it is also possible to open the Bin file with the "Read Text File" Node and see the cryptic content of the Bin-File. So the Problem seems to be in the "Read Form Binary File" Node.
    bye & thanks again
    amin
    Message Edited by aminat on 09-30-2009 03:28 AM

  • How to get info from imported file in an outbound campaign IVR-based. UCCX 8.5.

    Hello.
    Somebody knows if it is possible to get the information inside my ivr script from the file imported when I create an outbound campaign IVR-based?
    I want to store in variable data like first name, last name, account number... And use them in the flow of my IVR script.
    I´m using UCCX 8.5.
    Regards

    did you get this to work ?

  • Can I build vst instruments from wave files?

    I have a bounce of wave files and would like to use them as vst instruments in Logic. Can I build my own vst instrument somehow?

    You can load them into the EXS24.

  • Read info from xml file

    HI All,
             I task to read the data from XML file and and assign to variable in batch script.Can any one help me how can I do this
    Samar

    Here you go:
    @echo off
    for /F %%a in (d:\test.xml) do echo %%a | find /i "var=" && set var=%%a
    It is extremely unlikely that this batch file will do what you want it to do but in the absence of any details in your post I was forced to use crystal ball gazing techniques. Seriously - if someone asked
    you how to do the job, what would
    you tell him? There is no room for guesswork in scripting!

Maybe you are looking for

  • [SOLVED] intel 855GM, Xorg 1.6.1 and black screen

    Just installed Arch on my desktop and have the following problem: I have generated x.conf.new using X -configure and that resulted in two Device sections for cards - "0:2:0" and "0:2:1" Bus ID. With this configuration X refused to load with message "

  • Full image links working but showing broken in dreamweaver?

    All my images were displayed as relative links and worked perfectly on local host and displayed correctly on dreamweaver design view, but I wanted to change them to full links before I go live. So I changed all the urls (using find and display) and n

  • Wi-fi: no hardware installed

    Since the upgrade to 10.7.2 on my macbook pro the wifi icon is greyed out (and can't get any access to wi-fi). The iMac (on 10.7,2) is fine. Any suggestions to get it fixed ? Thx

  • Saving images and catalogue issues.

    Hi, I have been using LR for a few months now and have watched countless tutorials (a lot of Adobe.tv) I am having major issues with staying on top of my numbering and filing system and really need some tips. I try and explain. When I first open the

  • I need a older version of firefox, where do I get it?

    I just had to update my computer O.S. to windows 7, I need a version that isn't version 9. Version 7 or 8 will do, I think. Where can I get this version? Thank You, Bill parker