Stereo sound generation in LabView 8

[dlee27]

Hi,

I'm upgrading the code written in Labview 7 to 8.
In version 7, SOwrite vi took 2D array for stereo output but it's not the case anymore. Now, it takes signal waveform and sound data is 1D array. I want to generate two different tones into each channel. How can I do this?
Thanks.

Message Edited by dlee27 on 08-19-2006 11:55 AM

[altenbach]

Just wire an array of two waveforms to "sound output write" 😄

[dlee27]

Why didn't I try that? Stupid me.
Thank you.

[keshav]

Hi,

I'm rather new to LabView and I have a similar problem. I want to generate two different sounds in each channel, but I wasn't able to get the above method to work for me. What I basically want is that when I wear headphones and run the VI, I should hear continuous clicks in one ear and masking noise (white noise) in the other. I've got the waveforms done, but can't figure out how to send them to different channels. Any help would be appreciated. 🙂

Thanks!

[altenbach]

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keshav wrote:
 I want to generate two different sounds in each channel, but I wasn't able to get the above method to work for me.

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What kind of problems did you encounter when you made an array of the two waveforms? (broken wire? incorrect result?, etc.)

[GerdW]

Hi Altenbach,

it's a broken wire - SOWrite doesn't take an input array... See attachment (LV85).

[keshav]

Hi GerdW,

Yes that is the problem i'm facing. SOWrite doesn't take an input array. I can't use your attachment though, since i'm using LV8. Could you explain briefly what I should be doing? Thanks!

[GerdW]

Hi keshav,

no idea so far - I will write an email to NI support right now...

(The attached pic shows the block diagram of the example vi.)

[keshav]

Thanks for the pic GerdW, i'll try that out now. Do let me know what you find out.

cheers.

[altenbach]

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GerdW wrote:
Hi Altenbach,

it's a broken wire - SOWrite doesn't take an input array... See attachment (LV85).

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Your two waveform controls are actually already 1D arrays of waveforms, probably with one element each (?). Your code would make a 2D array of wavforms that the primitive cannot accept.

Possible Solutions:

• Make sure you have a 1D array of waveforms with two elements, one for each channel.
• Right-click on the "built array" node and select "concatenate inputs". (this will work if each input array has onne waveform element)

Useful tools:

• When you hover over a wire using the context help window, it will tell you eactly what you have. 🙂
• Hover over the broken wire, and it'll tell you what the problem is, just wait for the tip strip (see iamge).

Message Edited by altenbach on 02-29-2008 08:57 AM