How to UseA RAD USB Input block represents the USB audio signal received from the RAD connected to the corresponding RAD port on the HAL or EXP device. The Channel 1 input block represents the Left Playback channel, the Channel 2 input block represents the Right Playback channel for stereo USB audio.
- Click the Processing tab to open the Processing Workspace.
- In the palette area, click the I/O tab.
- In the Remote Audio Device Ports category, find the RAD you want. Click and drag its USB Input block into your Processing Map.
- Wire the block's output to the appropriate block in the system.
- (Optional) Customize the block name, channel name, and/or output node name by clicking the current name and then typing the custom name in the text box that appears. Click the X to save the name.
note: A RAD does not appear in the I/O palette until it has been added to the system in the Hardware Workspace.
- Open the USB Input block's properties by double-clicking the block or hovering and clicking the properties icon that appears in the upper right of the block's title bar. From this dialog box, you can do the following:
- Set the volume of the block's output by adjusting the Gain slider or entering a value in the edit box.
- Provide volume control to end users by linking one or more DR1 or DR3 level controls to the block's Level Gain control. You can limit the range of end user volume control by adjusting the minimum and maximum values at either end of the level control. For example, to give the end user 24 dB of attenuation, set the minimum to -24 dB and the maximum to 0 dB. To change these values, click the minimum or maximum value displayed below the slider. An edit box displays in which you can set the Minimum and Maximum parameter values.
- Cause the audio to mute completely when dialed to the low end of its range by selecting the Off @ Min checkbox. Using the example range described above, checking Off @ Min provides continuous volume control from 0 dB to -23.9 dB and then mutes the audio completely.
- Mute the output channel—without changing the specified Gain value—by selecting the block's Mute checkbox. You can provide end users with control over this Mute parameter by linking the block's Mute control to a Logic In, DR2, or DR3 Toggle control.
- View meter data for the audio signal after passing through and after passing through the Level settings.
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Link the USB Connected toggle control to other toggle controls in the HAL system such as an output relay and/or Ethernet control system message to turn on the projector, lower the screen ,dim the lights and start the Bugs Bunny cartoon before the movie. USB Connected means a PC connected to the USB RAD has recognized the RAD as a USB Audio device and it can be selected as the audio I/O device for the PC.
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