Sample value accuracy in sample editor

My setup is a motu 2408mk3 into Logic Pro 6 on my G4 mac.
When I open a 24 bit aiff file in the sample editor and set the sample editor to view samples on the vertical axis, it only shows a max sample value of 32767. This is the max value of 16 bit data, it should read 8388607 for a 24 bit file.
Logic recognizes the file as a 24 bit file, so why does it not show the sample values correctly?

Admittedly, my reply is based on a guess here... but it wouldn't surprise me if the Y-axis display is indeed preset at 16-bit values. Not sure if Logic 6 contains an algorithm that adapts the Y-axis amplitude values according to the bit depth of the sample you're looking at.

Similar Messages

Display sample values on a graph

Hallo!
I`ve got a problem with a graph, the thing is I really need to have displayed Y values of the samples on a graph. There is a possibility to make a comments (as on a pic attached) but I need the vals instead. Any ideas? Thanks for the trouble,
greetings!
Solved!
Go to Solution.
Attachments:
bild.jpg ‏37 KB

Dear Aleph.ka,
here is an example of what you might need. For further documentation please refer to the description of the applied property node (Annotation List):
http://zone.ni.com/reference/en-XX/help/371361H-01/lvprop/waveformgraph_annot_list/
I hope this helps.
Regards,
Adam Cseh
Applications/Systems Engineer
National Instruments
Attachments:
graph annotation.png ‏32 KB

Sample values needed for Customer Number And Sales Organisation in BAPI

Hi Experts,
    I want to execute the Bapi BAPI_SALESORDER_GETLIST with mandatory parameters such as Customer Number & Sales Organisation .
    How would I come to know what values to enter for Customer Number & Sales Organisation inorder to get some Output in the form of table SALES_ORDER.
    Can you ll help me with some sample values which I can enter to get some useful output.
    And what is the logical way to go inorder to test such BAPIs in future.
Thanks in Advance,
Pavanmeet Singh

Hi,
CALL FUNCTION 'BAPI_SALESORDER_GETLIST'
EXPORTING
customer_number = cust
sales_organization = sorg
MATERIAL =
DOCUMENT_DATE =
DOCUMENT_DATE_TO =
PURCHASE_ORDER =
TRANSACTION_GROUP = 0
PURCHASE_ORDER_NUMBER =
IMPORTING
return = it_return
TABLES
sales_orders = salesorder_itab.
Regards
Sudheer

Sample per channel and sample to read

Hello everybody
I am new in LABVIEW and I have some difficulties with something.
I don t know exactly what is the difference between the sample per channel et the sample to read. I believe knowing that the sample per channel is the size of the buffer which is more big than the sample rate but I don t know what is the sample to read.
I ve tested with different sample per channel and sample to read. Sometimes I have an error and sometimes know and I would like to know why. If you have any example for I understand better, it will be great.
I really need to understand this part for my project
Thank for your help
Romaric GIBERT
Solved!
Go to Solution.

Hi Roro,
As you mentioned, when acquiring continuous samples you can specify the sample buffer size by placing a value at the input "samples per channel" on the timing vi. The "number of samples per channel" input on the read vi which automatically names a control/constant with "samples to read" specifies the number of samples you wish to pull out of the buffer in one go when reading multiple (N) samples. This link may provide a bit more clarification. I have also attached a good example from the NI example finder which you may find useful to explore. I'm assuming you are using the DAQmx driver set so please let me know if this is not the case, but the same principles should apply either way.
This therefore means when sampling at a given rate, you need to ensure you are pulling data out in big enough 'chunks' to prevent the buffer from overflowing (which may well be causing the error you are seeing). Conversely if your sampling rate is slow and your read vi is having to wait for the number of samples to read you specified to be available, it may throw a timeout error. You can avoid this by either increasing your sampling rate, reducing your samples to read or increasing the timeout specified at the read vi input (-1 means it will wait indefinitely).
Let me know if this helps and how you get on.
All the best.
Paul
http://www.paulharris.engineering
Attachments:
Cont Acq&Graph Voltage-Int Clk.vi ‏27 KB

Using color sampler values with curves adjustment layer

Hi, I have just started trying to teach myself javascript. Based on preliminary research, it's become apparent that there are many functions in Photoshop that are either extremely cumbersome or impossible to code by hand without using the Script Listener.
My goal is as follows: first, I will manually load two photos as layers in a single document. Then I will manually place two or more color sampler points on the document. At this point I would like the script to create a curves adjustment layer (ideally clipped to layer 2) and place as individual channel anchor points the RGB data from the color sampler points on Layer 2, and then adjust the output of the points on each channel to the color sampler RGB values of layer 1.
As my first script, I realize this is probably going to be a lot of work.
I did find some code that returns the average value of manually placed color sampler points. Conceptually then, I would need to add code which creates a new curves adjustment layer and adds those RGB values (from a specific layer) as anchor points on the individual channels, and then hides one layer and looks at the RGB values of the color sampler points, and uses them as the output values for each anchor point.
Sounds simple enough from a conceptual standpoint.
I'm looking for some guidance on how to get started.
Which parts will I definitely need Scriptlistener for and will that be adequate to do the job?
How would you recommend I get started on this?
Thanks very much for any input.

The function I had provided was an example into which you would need to feed the values you got with Mike’s code.
The code below would create a Curves Layer as shown in the screenshot, but I’m not sure it would work reasonably for all cases.
// with code by mike hale;
// 2012, use it at your own risk;
// call the function to run the script
#target photoshop
createCurveAdjustmetFromColorSamplers();
// create a function fo hold most of the code
function createCurveAdjustmetFromColorSamplers(){
    // first add some condition checks
    // needs an open document in a color mode that supports layers
    if(app.documents.length == 0 || ( app.activeDocument.mode == DocumentMode.BITMAP || app.activeDocument.mode == DocumentMode.INDEXEDCOLOR ) ){
        alert('This script requires a document in Greyscale, RGB, CMYK, or Lab mode.');
        return;
    // check for at least two colorSamplers
    if(app.activeDocument.colorSamplers.length < 2 ){
        alert('This script requires at least two colorSamplers.');
        return;
    // last check for at least two layers - assume they will be on same level( not in layerSet )
    if(app.activeDocument.layers.length < 2 ){
        alert('This script requires at least two layers.');
        return;
    // create varaibles to hold the colorSampler's color property for each layer
    // for the bottom layer
    var outputArray = new Array();
    // for top layer - array could also be created this way
    var inputArray = [];
    // store the number of samples because it will be needed in more than one place
    var numberOfSamples = app.activeDocument.colorSamplers.length;
    // hide the top layer
    app.activeDocument.layers[0].visible = false;
    // collect the samples from the bottom layer
    for(var sampleIndex = 0; sampleIndex < numberOfSamples; sampleIndex++ ){
        outputArray.push(app.activeDocument.colorSamplers[sampleIndex].color);
    // turn the top layer back on
    app.activeDocument.layers[0].visible = true;
    // collect those samples
    for(var sampleIndex = 0; sampleIndex < numberOfSamples; sampleIndex++ ){
        inputArray.push(app.activeDocument.colorSamplers[sampleIndex].color);
    // make sure the top layer is the activeLayer
    app.activeDocument.activeLayer = app.activeDocument.layers[0];
// create arrays of the color values:
var theArray = [[0, 0, 0, 0, 0, 0]];
for (var m = 0; m < inputArray.length; m++) {
theArray.push([inputArray[m].rgb.red, outputArray[m].rgb.red, inputArray[m].rgb.green, outputArray[m].rgb.green, inputArray[m].rgb.blue, outputArray[m].rgb.blue]);
theArray.push([255, 255, 255, 255, 255, 255]);
// sort;
theArray.sort(sortArrayByIndexedItem);
// makeCurveAdjustmentLayer();
rgbCurvesLayer (theArray)
////// make rgb curves layer //////
function rgbCurvesLayer (theArray) {
// =======================================================
var idMk = charIDToTypeID( "Mk " );
    var desc5 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref2 = new ActionReference();
        var idAdjL = charIDToTypeID( "AdjL" );
        ref2.putClass( idAdjL );
    desc5.putReference( idnull, ref2 );
    var idUsng = charIDToTypeID( "Usng" );
        var desc6 = new ActionDescriptor();
        var idType = charIDToTypeID( "Type" );
            var desc7 = new ActionDescriptor();
            var idpresetKind = stringIDToTypeID( "presetKind" );
            var idpresetKindType = stringIDToTypeID( "presetKindType" );
            var idpresetKindDefault = stringIDToTypeID( "presetKindDefault" );
            desc7.putEnumerated( idpresetKind, idpresetKindType, idpresetKindDefault );
        var idCrvs = charIDToTypeID( "Crvs" );
        desc6.putObject( idType, idCrvs, desc7 );
    var idAdjL = charIDToTypeID( "AdjL" );
    desc5.putObject( idUsng, idAdjL, desc6 );
executeAction( idMk, desc5, DialogModes.NO );
// =======================================================
var idsetd = charIDToTypeID( "setd" );
    var desc8 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref3 = new ActionReference();
        var idAdjL = charIDToTypeID( "AdjL" );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref3.putEnumerated( idAdjL, idOrdn, idTrgt );
    desc8.putReference( idnull, ref3 );
    var idT = charIDToTypeID( "T   " );
        var desc9 = new ActionDescriptor();
        var idpresetKind = stringIDToTypeID( "presetKind" );
        var idpresetKindType = stringIDToTypeID( "presetKindType" );
        var idpresetKindCustom = stringIDToTypeID( "presetKindCustom" );
        desc9.putEnumerated( idpresetKind, idpresetKindType, idpresetKindCustom );
        var idAdjs = charIDToTypeID( "Adjs" );
            var list1 = new ActionList();
                var desc10 = new ActionDescriptor();
                var idChnl = charIDToTypeID( "Chnl" );
                    var ref4 = new ActionReference();
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idRd = charIDToTypeID( "Rd " );
                    ref4.putEnumerated( idChnl, idChnl, idRd );
                desc10.putReference( idChnl, ref4 );
                var idCrv = charIDToTypeID( "Crv " );
                    var list2 = new ActionList();
// add r points;
for (var m = 0; m < theArray.length; m++) {
          addCurvePoint (list2, theArray[m], 0)
                desc10.putList( idCrv, list2 );
            var idCrvA = charIDToTypeID( "CrvA" );
            list1.putObject( idCrvA, desc10 );
                var desc15 = new ActionDescriptor();
                var idChnl = charIDToTypeID( "Chnl" );
                    var ref5 = new ActionReference();
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idGrn = charIDToTypeID( "Grn " );
                    ref5.putEnumerated( idChnl, idChnl, idGrn );
                desc15.putReference( idChnl, ref5 );
                var idCrv = charIDToTypeID( "Crv " );
                    var list3 = new ActionList();
// add g points;
for (var m = 0; m < theArray.length; m++) {
          addCurvePoint (list3, theArray[m], 2)
                desc15.putList( idCrv, list3 );
            var idCrvA = charIDToTypeID( "CrvA" );
            list1.putObject( idCrvA, desc15 );
                var desc20 = new ActionDescriptor();
                var idChnl = charIDToTypeID( "Chnl" );
                    var ref6 = new ActionReference();
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idBl = charIDToTypeID( "Bl " );
                    ref6.putEnumerated( idChnl, idChnl, idBl );
                desc20.putReference( idChnl, ref6 );
                var idCrv = charIDToTypeID( "Crv " );
                    var list4 = new ActionList();
// add b points;
for (var m = 0; m < theArray.length; m++) {
          addCurvePoint (list4, theArray[m], 4)
                desc20.putList( idCrv, list4 );
            var idCrvA = charIDToTypeID( "CrvA" );
            list1.putObject( idCrvA, desc20 );
        desc9.putList( idAdjs, list1 );
    var idCrvs = charIDToTypeID( "Crvs" );
    desc8.putObject( idT, idCrvs, desc9 );
executeAction( idsetd, desc8, DialogModes.NO );
return app.activeDocument.activeLayer;
////// add curve point //////
function addCurvePoint (theList, valueHor, theNumber) {
var desc11 = new ActionDescriptor();
var idHrzn = charIDToTypeID( "Hrzn" );
desc11.putDouble( idHrzn, valueHor[theNumber] );
var idVrtc = charIDToTypeID( "Vrtc" );
desc11.putDouble( idVrtc, valueHor[theNumber+1] );
var idPnt = charIDToTypeID( "Pnt " );
theList.putObject( idPnt, desc11 );
////// sort a double array, thanks to sam, http://www.rhinocerus.net/forum/lang-javascript/ //////
function sortArrayByIndexedItem(a,b) {
var theIndex = 0;
if (a[theIndex]<b[theIndex]) return -1;
if (a[theIndex]>b[theIndex]) return 1;
return 0;

Disposition value change in sample

Hi,
In a sample accidentally disposition has been made as 'Cancel'. Is there a way to change the value?

Can i change the status of the SAMPLE_DISPOSITION column in GMD_SAMPLES tables from cancel (7CN) to pending (1P) from back end? Does it impact something?

A sample Value Object code.

I understand it is a type of collection to exchange data with enterprise beans.
Am I right?
If I use value object, how can I make it?
can I get a sample?
in my understanding, I might have to make many VOs for each biz entity.
can I make a common VO( like a common dao ) to make it simple?

a value object is usually just a wrapper class that has no business or persistence logic- it's just a container for data, e.g.:
public class UserKey {
private String name;
private String userID;
//getter and setters
}

Calculating RMS value of data samples in RT

I am using CompactRIO 9014 in my control application. I am acquiring data from NI 9215 module. I want to calculate RMS value of data coming from this module for monitoring of the system. I want to include data samples within 1sec to calculate RMS value. I am sampling at 25KHz rate. I want to use RT for processing there a way to do this? I am using Labview 8.6.

suni wrote:
I am using CompactRIO 9014 in my control application. I am acquiring data from NI 9215 module. I want to calculate RMS value of data coming from this module for monitoring of the system. I want to include data samples within 1sec to calculate RMS value. I am sampling at 25KHz rate. I want to use RT for processing there a way to do this? I am using Labview 8.6.
Hi suni,
Yes, you can do the processing on the RT host - that's actually the recommended way of doing things. I suggest using a DMA FIFO to transfer the data from your FPGA to the RT host, however you don't want to make your FIFO 25k elements long. Instead, you can write/read the FIFO in chunks (recommended size is under 8196 elements). Then, as long as you're reading from the FIFO at a reasonable rate on the RT, you should be able to pull out the elements and perform the RMS calculations.
If you're new to FPGA, I highly recommend looking at the examples in Help > Find Examples > Hardware Input and Output > compact RIO. A lot of them demonstrate communication between the FPGA and RT hosts.
Hope this helps!
Misha

Average value of N samples

Hi,
I have a problem. I'm reading data continuously from analog input. I want calculate average value when I press button START. Average value should be calculated from samples which are defined by 'Number of samples' and 'millisecond multiple'. When all samples are read, average vale should show.
The problem is that when number of samples is higher then 10, it doesn't work.
Can someone tell me what I did wrong?
Thanks
P.S.. I saw that there was something like this but I can't open it because I use Labview 8.5
Attachments:
Average.vi ‏35 KB

For that you need to store the previous value for averaging... i have attached a VI regarding that ( sorry no time to cleanup ).. You can use the logic to calculate the average of the samples (Still am not clear about you requirement).
The best solution is the one you find it by yourself
Attachments:
Average_anand.vi ‏26 KB

Sample accurate edits in sample editor

I am new to Logic Pro, having previously worked with Cubase. I understand that the underlying engine of logic is constructed upon beats, frames, ticks etc., but is it possible to do sample accurate editing in the sample editor?
At present any small selection of say 2 or 3 samples in length is often enlarged to many samples. Is this because of the 'snap to' parameter? Is this behaviour unavoidable?
Cheers,
Georgie

Your method is essentially a hack is it not?
For using the sample editor, no
For the arrange, absolutely - but it does work if you can work in such a short time.
It intrigues me that this should be necessary - it reinforces my understanding that Logic is at its core a sequencer, as opposed to a sound editing tool.
Yes, it's roots are in sequencing - still, I am surprised it is still restricted this way.

How to sample an analog signal, simulated on labview and get the sample values.

My project involves this particular detail where i have to sample a simulated sine wave and get the samples and compare them so as to select a particular length for hanning window.Then it also requires me to experiment with the window size so as to get more efficient data out of the sampled signals. please help me with the sampling part and guide me as to how to perform a hanning window operation on the sampled signal. I have directly used the spectral analysis tool which involves getting a FFT spectrum by a default hanning window setting. But since i have to experiment with the window size and variations, guide me with the sampling part and applying a separate hanning window. Thank you.

bhardoo wrote:
My project involves this particular detail where i have to sample a simulated sine wave and get the samples and compare them so as to select a particular length for hanning window.Then it also requires me to experiment with the window size so as to get more efficient data out of the sampled signals. please help me with the sampling part and guide me as to how to perform a hanning window operation on the sampled signal. I have directly used the spectral analysis tool which involves getting a FFT spectrum by a default hanning window setting. But since i have to experiment with the window size and variations, guide me with the sampling part and applying a separate hanning window. Thank you.
What do you mean by i have to sample a simulated sine wave?
the sine generator will provide you with a waveform (or an array of values you can use), there are basic vis to do all this, rigth click on the vi and select help to get detailed information.
Post your vi if you have trouble with details.
How much do you know about LabVIEW and signal theorie?
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

Comcast will not accept my spot because the audio sampling value of 44100 does not match the expected rate of 48000. Any ideas how to fix?

I am working with Final Cut Pro 10.1.4. I created a 30 second spot with a music bed. Comcast is rejecting the spot because the audio sampling rate does not match the actual audio values in the spot. They expected 48000 and my spot is 44100. This may be caused because I was forced to change the speed of the audio to work properly in the spot. The audio was sped up to 101%. First, is this what caused Comcast to reject and second, is there a way to restore the rate without slowing down the music bed?
Thanks!

FFirst check your project properties. The default is 48K.

Calculate the average value of 10000 samples stored in a file. LVM with LabView

Hello, I'm using a NI 6034 to acquire through _ LabView a signal in volts from a pressure transducer, these data then save them to a file. Lvm using the "write to a file" (at least I think you call it or something like that). I would have 2 questions:
1) you can always using the virtual instruments to implement a block I calculate directly the average of these 10 thousand values without having to go to the star on excel every time?
2) is it possible to somehow remove the header that LabView a creates by default in the file. LVM when you save?
I hope someone will give me an answer because I'm really losing a lot of precious time to pass each time data from lvm file to the excel.
Thank you in advance for your advice.
Solved!
Go to Solution.

Marco86,
1. You should be able to read the data directly from the .lvm file in LV. Use the Express VI Read from Measurement File. You can wire the Signals output to the X input of the Mean.vi from the Mathematics >> Probability & Statistics palette. LV will automatically insert a conversion from the Dynamic Data Type output of the Read to the 1D Array of Doubles that Mean needs.
2. I rarely use the Write to Measurement FIle Express VI so I am not sure whether you can completely suppress the header. If you use the Write to Spreadsheet File.vi you get a tab delimited text file containing only your data converted to text and delimiters. You can create you own headers by writing a string array to the file before writing the numeric data. Of course you can have complete control over everything in the file by using the low level file functions and data manipulation and string conversion functions.
Lynn

Java classpath error while crawling sample user defined datasource (SampleA

Hi All,
I am trying to run the sample crawler agent provided by ultra search "SampleAgent.java". For this
I have created and configured the user defined datasource type and the user defined data source (for the NEWS TABLE) as per the readme file of the Sample Crawler agent.
I have also created a schedule for this user defined type.
However, while executing the schedule I am getting the following error:
WKG-30116: Can not find agent class "SampleAgent" from the java class path
Please let me know the reason for the error. Am I right in creating and executing a schedule for user defined data source? (the doucmentation never says that, for user defined datasource, I need to create a schedule and execute it!!)
Also, after going through some of the postings in this discussion forum I understood that I need to check my java classpath from the WK$CRAWLER_DEFAULT_CONFIG table.
In this table my the value for
CC_JAVA_EXEC_PATH is "C:\oracle\ora92\jdk\bin\java.exe -ms16m -mx256m"
and
CC_JAVA_CLASS_PATH is
"-classpath
C:\oracle\ora92\jdbc\lib\classes12.zip;
C:\oracle\ora92\jdbc\lib\nls_charset12.zip;
C:\oracle\ora92/ultrasearch/lib/ultrasearch.jar;
C:\oracle\ora92/ultrasearch/lib/ultrasearch_db.jar;
C:\oracle\ora92/lib/mail.jar;
C:\oracle\ora92/lib/activation.jar;
C:\oracle\ora92/ultrasearch/lib/jgl3.1.0.jar;
C:\oracle\ora92/lib/xmlparserv2.jar;
C:\oracle\ora92/lib/xschema.jar;
C:\oracle\ora92/ultrasearch/bin;
C:\oracle\ora92/ultrasearch/lib/agent/"
Do I need to change any of these values? If so, what changes should I make and how should I make those changes?
NOTE THAT I AM USING THE DATABASE VERSION OF ULTRASEARCH.
Thanks in advance,
Amit Sangle

Hi All,
I would appreciate any help that I get regarding this post.
If anyone has run the Sample crawler Agent please let me know the steps needed to make it work. I have followed the steps mentioned in the readme file here:
http://otn.oracle.com/docs/products/ultrasearch/doc_library/ultrasearch9_2/sample_agent_readme.htm
Are there any other configurations that I need to do? Am I missing something? Please let me know.
Thanks and Regards,
Amit Sangle

Max sampling rates in differential sampling

I am rather a novice in terms of DAQ and wonder about the maximum
sampling rate. For the DAQ-cards I use (M-series 6221, E-series 6024)
the max sampling rates are said to be 250 and 200kS/s respectively. I
am aware that all channels share a common A/D converter, and that
sampling several channels concurrently limits the max frequency per
channel to a smaller value. But, what if I use differential sampling?
Does this mean I have a reduced max sampling rate since it uses 2
analog input channels? My guess is that I dont, that it is handled
before A/D conversion, but I cant find the answer anywhere.
Hope you can help!

Hello Sirnell!
You will have the same sampling rate regardless of which connections you make (differential,RSE, NRSE), but with the differential connection you will reduce the amount of channel you can use. With an E-series board with 16 inputs you will only be able to connect 8 signals using the differential connection.
For more information about Field wiring take a peek at this link:
http://zone.ni.com/devzone/conceptd.nsf/webmain/01F147E156A1BE15862568650057DF15
For more information about DAQ (glossary):
http://zone.ni.com/devzone/conceptd.nsf/webmain/45ACC30D4A769A3F862568690061D750
Cheers.
Ashwani S.
Applications Engineer
National Instruments Sweden

Sample value accuracy in sample editor

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