USING VB VIRTUAL AUDIO CABLE INSTALL
USING VB VIRTUAL AUDIO CABLE DRIVER
USING VB VIRTUAL AUDIO CABLE SOFTWARE
USING VB VIRTUAL AUDIO CABLE WINDOWS

This enables the Windows Mixer and can cause unpredictable results. NOTE: Do NOT check the Volume Control box in the VAC control panel. NOTE: Repeat these changes for the second audio cable as well. In the example above, I am using Cable Range because it provides the most flexibility and does not adversely affect the performance of PowerSDR on the computer I am using.Īfter completing all of the necessary changes, click on Set for each cable when completed. Therefore using Cable Format as the stream format may help with audio drop outs. If you decide to use the Cable Range stream format, one thing to consider, when a format conversion occurs, it takes significant CPU resources and it may noticeably slow your applications causing audio drops outs. Since PowerSDR defines both audio cables' format when VAC support is enabled, using the Cable Format is recommended. You can choose two different Stream limit formats cable format and cable range. Depending on your computer setup you may have to adjust this value to prevent the audio from dropping out or 'popping'. The lower the value, the smaller the VAC audio buffer. In the 'Ms per int' box enter a value between 1 and 20 ms. Highlight the appropriate cable and change the values to match the figure above.

USING VB VIRTUAL AUDIO CABLE DRIVER

You will need to create two cables by changing the driver parameters to 2 cables then click SET and Restart. By default only one audio cable is defined. Once installed, set up a pair of VAC audio 'cables' for use with PowerSDR by opening the VAC Control Panel. If VAC was previously loaded, you must first uninstall all versions before installing a new version of VAC 4.0x

USING VB VIRTUAL AUDIO CABLE INSTALL

Install VAC 4.0x as per the installation directions. Obtain and install VAC 4.0x on the same computer that is running PowerSDR Below is a summary of the steps required.ġ. There are several steps involved in getting VAC installed and working properly with PowerSDR. This article has screen shots from the 4.08/4.8 version of VAC Also, screens change significantly from sub-release to sub release, so the ones shown may not be exactly what is the most current.

USING VB VIRTUAL AUDIO CABLE SOFTWARE

His software which is labeled 4.08 on his web site comes up as 4.8 in the program's About menu. Note: The program's developer, Eugene has introduced a problem in his version control. You can get information from the VAC Home Page.

VAC is written and maintained by Eugene Muzychenko. This allows the user to setup and control the audio parameters of VAC directly from the PowerSDR console. PowerSDR version 1.6.0 (and above) has native support for VAC when using the DRM or DIGIx modes.

WDM/KS Audio technology native for Windows 2k/XP/2k3.

PCM format conversion between clients on either end of the VAC cable.

Signal mixing (with saturation) between output port clients.

Almost no sound latency with maximal interrupt frequency.

Floating point formats are not supported.

Almost any of fixed point PCM audio formats (200.1000000 samples per second, 8.32 bits per sample, 1.8 channels).

VAC version 4.0x is an upgraded version from 3.12.

A computer PCI, Firewire or USB slot is not used.

There are no external cables to degrade the sound quality or possibly pick up RFI.

The entire audio stream is maintained in the digital domain - there is no multiple conversions of the signal from digital to analog and from analog to digital.

There are some significant advantages to using VAC over a second sound card. Virtual Audio Cable (VAC) is a third-party software program that allows the rerouting and the emulation of a sound card in software rather than having to use a second sound card for audio analysis or use with digital mode programs such as MixW and WSJT.

Using vb virtual audio cable