Auto generate SoundFile

[huguerreiro]

Hi there,

I'm using Labview 8.2.1, and trying to create a sound file  (*.wav) without ask de user the location and name of the destination file, this event will occur when the user latch one button or by a trigger generated by analyse the sound waveform.

I already make a sound acquisition by a generic usb sound card, and I was able to make the acquisition and generate the file but not automatically. I only was able to start a acquisition and recording, but I never was able to make a continuous acquisition and recording some sound in the middle.

Can anyone help me?

Thanks

Hugo Guerreiro

[Florent_A]

Hello Hugo,

Thank you for posting on National Instruments forum.

I am not sure to well understand your trouble. In fact you build a VI to acquire a sound and you would like  to have a button which allow to record what you are acquiring when click on it?

But you do not want to record your acquisition?

Is that right?

Have a nice day,

Regards

[huguerreiro]

Hello Florent,

I want to built a vi that can continuously acquiring sound without stop, and recording into a (*.wav) file sometimes in the middle of the acquisition, without prompting the user.

Thanks for your time

Best Regards

Hugo Guerreiro

[Dennis_Knutson]

If you don't want to continuously prompt the user for a file name, remove the File Dialog function you have there. Create the file name dynamically.

The use of the for loop around the acquire and write is silly. Why don't you simply use a case statement? You should also consider moving the sound file Open, Sound Input Config, Soudn Input Clear and Sound File close to outside the main while loop. No reason to call those each and every iteration.

[huguerreiro]

Hi,

You where right, I just thougth that I need the file dialog somehow.

Now I can create the wave file dynamically , but I still can't create as many files as I want without stopping the acquisition.

Thanks in advance

Hugo Guerreiro

[Dennis_Knutson]

Sorry, I may have given some bad advice. I'm not sure if the Sound File Write appends data each time it is called or whether it overwrites the previous data. You may have to do the write when the inner loop finishes. There is a function on the Waveform palette to append one waveform to another and you would pass the appended waveform out through the loop.

[huguerreiro]

No, you gave me a good advice.

Now I'm able to generate a different wave file each time I want, because I'm already generating a dynamic filename.

By now my only problem is that I don't want to stop the acquisition. I need to perform some eye analysis during the acquisition, and I can't see the waveform graph without recording it.

Best Regards

Hugo Guerreiro

[Coq_Rouge]

I think I understand what you are doing. You are a trainee for FBI. And they want you to make a Labview based surveillance system. They plan to listen in all the time. But then they hear something useful, they press record. A new file with some predefined automatic naming system will be created. Then the rerecording is stopped the file will be closed.

Well perhaps not true about the FBI thing But I guess the principals are correct;)

[huguerreiro]

 Yes,

Is exactly that what I intend to do... Can you help me?

You are also true, I'm a secret agent from FBI.... Now I have to kill you!! LOL  But first give me some info...

 Thanks

Hugo Guerreiro (NI secret agent)

[huguerreiro]

Hello there,

I can't find a way of make this work...

Plese give some ideas.

Thanks

Hugo Guerreiro