simultaneous sound io.vi
in [LabView]
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From: martper on 6 Mar 2007 05:40 We have tried the Simultaneous sound Io.vi but have experienced problems. We are using the microphone input and speakers on the same sound card. The number of samples/ch is 5000 and the sample rate is 44100 S/s. Number of channels are 2 and bits per sample is 16. When running the program we get a error message (4823) after some time (sometimes 3 seconds and sometimes after several minutes). If the number of samples/ch is increased, will the program run a longer time before failing. We tried to run the program on a computer with two sound cards and then it did not fail. The other problem is that it dose not sound good. The speakers plays the input signal with some kind of sparking sound (glitches? choppy?). After some time this sound dissapere and it sound good but can come back again. I have search the forum for simular sound problems but have not found anyone with this kind. Best regards, Martin Persson
From: Hans PPPL on 15 Mar 2007 11:10 I have been having the same issue getting a 4823 error when running Simultaneous Sound IO vi M-Audio Delta 44 Sound Card Dell Dimension 360 PC Windows XP SP2 LabVIEW 8.2 20,000 Samp/Ch 4 Channels 44,100 S/s 16 Bit resolution I can get the vi to stop on 4823 error at will by opening mail in Microsoft Outlook although it has stopped on it's own as well. I am trying to develop a 4 Track Record - Playback application to replace a Tascam 234 Syncaset 4 track recorder. I'd like to have "confidence monitoring" while recording and thought a vi like the Simultaneous Sound IO vi would do the trick. Is this a problem with the dll in Sound Input Read vi (which generates the 4823 error) or an issue with the Sound Output Write vi? Sure would like to hear of any fixes ? thanks.
From: Hans PPPL on 19 Mar 2007 09:10
Backstage, Thanks for your reply and link to the ?French? discussion of this problem. I stumbled on ?French? discussion on Friday and had the same questions as you. Why 16536 samples and why divide by 3? I suspect that that configuration works best on V�ronique?s PC. I have tried her vi (Simultaneous Sound IO_works.vi) and on my PC it still get the 4823 error. I have run out of time and must move on to other projects but will check back on this and the ?French? discussion periodically. No need to apologize for your English as my French is much, much worse. (http://www.freetranslation.com/) Hans Backstage, Merci pour votre r�ponse et relie � la discussion � fran�aise � de ce probl�me. J'ai tr�buch� sur la discussion � fran�aise � vendredi et questions pareilles eues comme vous. Pourquoi 16536 �chantillons et divise pourquoi par 3 ? Je soup�onne que cette configuration travaille mieux sur V�ronique PC. J'ai essay� son vi (Simultaneous Sound IO_works.vi) et sur mon PC il obtient toujours la 4823 erreur. J'ai manqu� du temps et dois d�placer sur aux autres projets mais v�rifierai de retour sur ceci et la discussion � fran�aise � p�riodiquement. Aucun besoin de s'excuser de votre anglais comme mon fran�ais est beaucoup de, beaucoup pire. (http://www.freetranslation.com/) Hans |