Labview for Vocal Processing

Does anyone here have experience using Labview for vocal processing? I
am beginning a project that requires real-time extraction of vocal
formants (Fourier modes) and it would be nice to have Labview do this.
I have used Labview a little on a previous project and I am pretty sure
it *can* be done, but I am hoping to find someone who has already done
this or something like it to get a few pointers.
John Starrett
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John,
It is definitely possible to do formant analysis in LabVIEW; my knowledge on formant analysis is very basic, but here is a VI to get you started. j
Here is a small description:
Opens the included wav file (just a vowel from a voice recording).
Send the data to the find single tone vi to get the main tone in the signal.
The Single tone vi exports the original signal minus the tone and we pass this again to the analysis.
The resulting arrays of Frequencies, amplitudes and phases are then used to generate the vowel again.
The second for loop generate all the tones with the specs extracted from the original signal and adds them all up.
Then we obtain the power spectrum of the original and the generated
data and compare them.
The white plots represent the original recorded signal and the red plots represent the generated signal.
To run the exampl just open the "Format Excercise.vi" select the number of tones to extract, select the wav file and run the vi.
This example does not uses any toolkit, however you may want to look into the Sound and Vibration Toolset (octave analysis, zoom FFT, weighting filters, etc.) or the Order Analysis Toolset.
I hope this helps.
Regards,
Juan Carlos
N.I.
Attachments:
Formant_Excercise.llb ‏361 KB
EE_vowel.wav ‏9 KB

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Post Author: Chriss
CA Forum: Administration
It's an BOE XI SR2, on Win2k3 server, with a print cluster with two print spools, handling 3000+ printers. I discovered this error to be intermittent and only on one of the spools. It turned out that the only common factor was an HP4250 print driver. I backed all the 4250s down to 4200 drivers and the intermitent error ("Error in File. The request could not be submitted for background processing.") went from about 100 a day to zero. The other spool had a different version of the HP4250 driver and would on rare occassion cause this error, "Error in File ... Page header or footer longer than a page." but never the background processing error.
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Post Author: krishna.moorthi
CA Forum: Administration
For Crystal reports :
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Check and revert back.
Regards
Mangalraj.S

How to look for duplicate process instances?

In Oracle BPM 11g, is there a good way to look for duplicate process instances based on process data attributes? For example, I have entered an instance of a process for 'John Smith' with a date of '4/1/2010' and I want to see if there is another instance in the same process with these same data values to evaluate as a potential duplicate. I believe we can write a java service to invoke the API to do this, but I am wondering if there is a better way within the process design to do this (XPath extension functions or soemthing?). It seems like this would be a common need.

I am really looking for an approach to looking for duplicate instances within my process flow, not from EM. So, if the user starts a new instance of a process, I can check for another instance that appears to be a duplicate and direct the flow to a human activity to review the potential duplicate and make a decision as to whether to continue processing the new instance or reject it. My guess is that we need to us a service task to invoke java code which uses the API to investigate other instances with the same values. But, I was hoping for a simpler solution....I have to think that this is not too uncommon.

LabVIEW for ARM 2009 Read from text file bug

Hello,
If you use the read from text file vi for reading text files from a sdcard there is a bug when you select the option "read lines"
you cannot select how many lines you want to read, it always reads the whole file, which cause a memory fault if you read big files!
I fixed this in the code (but the software doesn't recognize a EOF anymore..) in CCGByteStreamFileSupport.c
at row 709 the memory is allocated but it tries to allocate to much (since u only want to read lines).
looking at the codes it looks like it supposed to allocated 256 for a string:
Boolean bReadEntireLine = (linemode && (cnt == 0));
if(bReadEntireLine && !cnt) {
  cnt = BUFINCR;    //BUFINCR=256
but cnt is never false since if you select read lines this is the size of the file!
the variable linemode is also the size of the file.. STRANGE!
my solution:
Boolean bReadEntireLine = (linemode && (cnt > 0)); // ==
if(bReadEntireLine) {    //if(bReadEntireLine && !cnt) {
  cnt = BUFINCR;
and now the read line option does work, and reads one line until he sees CR or LF or if the count of 256 is done.
maybe the code is good but the data link of the vi's to the variables may be not, (cnt and linemode are the size of the file!)
count should be the number of lines, like chars in char mode.
linemode should be 0 or 1.
Hope someone can fix this in the new version!
greets,
Wouter
Wouter.
"LabVIEW for ARM guru and bug destroyer"

I have another solution, the EOF works with this one.
the cnt is the bytes that are not read yet, so the first time it tries to read (and allocate 4 MB).
you only want to say that if it's in line mode and cnt > 256 (BUFINCR) cnt = BUFINCR
the next time cnt is the value of the bytes that are not read yet, so the old value minus the line (until CR LF) or if cnt (256) is reached.
with this solution the program does not try to allocate the whole file but for the max of 256.
in CCGByteStreamFileSupprt.c row 705
if(linemode && (cnt>BUFINCR)){
cnt = BUFINCR;
don't use the count input when using the vi in line mode. count does not make sense, cnt will be the total file size. also the output will be an array.
linemode seems to be the value of the file size but I checked this and it is just 0 or 1, so this is good
update: damn it doesn't work!
Wouter.
"LabVIEW for ARM guru and bug destroyer"

Labview for Vocal Processing

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