the audio source is set using the osprey-500’s vfw mixer driver interface. some applications interface to the mixer driver directly and expose the look and feel specific to that application. however, there is a directshow based mixer interface that does not work with the osprey-500's vfw mixer. if you are having problems setting mixer settings (audio ports or gains), please contact support@viewcast.com and we'll help you resolve that issue.

    the default windows interface to the mixer driver can also be used and is the recommended way to set audio ports and gains on the osprey-500. there are two simple methods for getting to the mixer source and volume control dialog box.

   

    1. the easiest method for accessing this interface is to right click the speaker symbol on your taskbar (typically on the bottom right-hand side of your screen). then select the open volume controls option.

    2. if you do not see the speaker symbol, click the start button on the start menu, select programs-]accessories-]entertainment (or multimedia) and select volume control.

    either of these two methods brings forth the audio mixer interface for the audio playback device. to get to the osprey-500 audio capture (recording) device, select properties under the options menu. this pops up a dialog to select the mixer device. do not select the recording option within the adjust volume for section; this option is selected automatically when you select the osprey-500 for the mixer device. click on the dropdown list for mixer device to see the list of audio input and output devices, including the osprey-500.

   

    if more than one osprey-500 card is in the system, each osprey-500 card is enumerated individually. once an osprey-500 device has been chosen, select ok in the properties dialog box.

    the osprey-500 master control panel displays.

   

    the osprey-500 device is not a mixer in that it does not allow for mixing the various audio sources. therefore, when one audio input is selected, any other input previously selected becomes unselected. the select checkbox at the bottom of each source sets which source is actually being used. dv audio signals are embedded in db video signals. if you select dv audio, the video signal selection for pal/ntsc must match the state of the dv source.

    the osprey-500 software has an optional gain control feature that defaults to being on. when this feature is on, the 50% volume level for a given input results in no modification to audio being captured. at a 100% level (the topmost level), gain is increased by 2x.

    the quick-access volume control (left click on the speaker symbol) on the task bar controls playback volume and recording volume. to change record levels, go to options, then properties, and select recording.