vee_yar

Hi seniors, I am developing an application which allows the user to configure various parameters of DAQmx task and writes those parameters to the multicolumn listbox. The attached vi allows the user to configure only one channel and adds to the list, suppose the user try to add one more task in the list , then it replaces the previous task. How to develope the code in such a way that when the user configures second channel and clicks "add to the List" , then it should be written in the second row of the listbox instead of replacing the first row. Kindly guide me seniors

QUOTE(Jeff Plotzke @ Mar 13 2007, 09:10 PM) Hi Jeff Plotzke sir, thanks for your immediate reply.Actually i am developing a simple audiometer for hearing test.The idea is to play a audio signal in the range of 20 cycles/sec to 10Kcycles/sec.when i run the VI the volume of the audio signal should increase automatically, and the user should stop the VI when he is able to listen the sound.The volume level at which the user stops the VI is taken for the calculation of the hearing loss.Here if we have individual control for right and left speaker then we can test the hearing loss of both right and left ear. Here I attached a VI which has got frequency and volume control.but the problem is the duration of the sound played is going on increases as time increases and also the delay(i.e 1ms)between each sound output is not maintained uniformly. Kindly help me to solve the issues Thanxs in advance

Respected LabVIEW Experts, I want to play a audio signal with control over frequency and volume.Here i attached a VI which as got control over frequency,but i am unable to control the volume of sound played in the speaker.I want to have individual volume control for right and left speaker in the front panel(when PC Speaker volume is kept at the maximum position) kindly give suggestions to complete the program Thanks in advance

Jeff Plotzke sir, Thank you for immediate reply.I got your points and VI is working

Respected seniors, This is my first project in Labview, and also this is my first post in the extremely active labview forum. I am trying to develope a system to monitor ECG waveform and to calculate heart rate. I am using (labview 8) DAQ 6025E to acquire ECG signal,and also I got a noise free ECG waveform on the display but I am unable to calculate heart rate from the ECG waveform.I want to display heart rate(BPM) on the front panel while the VI is running(real time heart rate display). I have attached my labview code for your referrence. Expecting suggestions from experts. Thanking you in advance