Generating Sound

Beep

The Beep (Windows) node is sometimes useful for debugging. it can beep in a specified frequency for a specified time.

MessageBeep

The MessageBeep (Windows) node calls the MessageBeep windows-api function and is probably not usefull at all.

SourceBuffer

SourceBuffer (DShow9) lets you play back spreads of values on a multichannel soundcard.

Audio Output

MultiChannel Output

There are 2 different types of multichannel audio hardware:

• real multichannel hardware typically comes as external USB or FireWire devices and has 4/8/16 channels of input and output
• cheabo built-in 5.1 or 7.1 sourround sound cards coming on most modern mainboards.

External MultiChannel Audio Hardware

Cards of the first mentioned category cannot be addressed natively with vvvv other than using their WDM drivers which always only offer to use their channels in pairs of stereo. With those cards on an AudioOut (DShow9) node you can typically select "Channel 1/2" or "Channel 3/4" to play stereo-files via the FileStream (DShow9) node.

Addressing the channels of such a hardware individually only works using ASIO drivers, which are not supported by vvvv natively but via the BASS plugins provided by mr. vux. If you have the pluginpack installed look out for a node called AudioOut (BASS) and check its helpfile for further instructions. Note though, that if you want to use the BASS plugins in a commercial setup you'd need to get a separate license for BASS to that for vvvv.

5.1 or 7.1 Sourround Sound Cards

Multiple channels of a built-in 5.1 or 7.1 sourround card can be addressed using the WavePlayer (DShow9) node, see its help-patch for a how-to.

Latency

If you experience annoying latency with audiooutput try a "kernel-streaming" audio output:

the kxproject

http://kxproject.lugosoft.com

reclock

reclock
old page:http://reclock.free.fr/
This free tool installs a kernelstreaming directshow renderer, which can be selected from vvvvs AudioOut (DShow9). In the reclock configuration don't forget to select the "Kernel Streaming" audio interface for the soundcard you want to use. Like this you get low latency like with ASIO drivers.