ViewCast 240E Audio formats, Audio playback, Audio configuration, Mono Source Mode, Dual Mono

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The Audio Driver

Audio formats

The Osprey hardware supports sampling of analog audio at 32, 44.1 and 48 kHz in 16-bit PCM format. Captured audio data is down-sampled and reformatted if necessary by Microsoft system audio components, allowing an application to capture audio data in 8-bit and 16-bit mono or stereo formats at any of the following data rates:

8 kHz

11.025 kHz

16 kHz

22.05 kHz

32 kHz

44.1 kHz

48 kHz

Audio playback

Osprey cards provide audio capture only, not audio playback. Continue to play back captured audio using your system soundcard.

Audio configuration

The OspreyConfig applet is included as part of the Osprey AVStream driver package. It is also provided in source form in the Osprey AVStream SDK. It provides supplementary controls that are not available via the standard system properties.

OspreyConfig’s controls are device-specific and apply only to Osprey audio capture devices. Use the Device menu list at the top of the applet’s window to select which device you are controlling.

Mono Source Mode

If set to Use Left Channel, then left channel audio data is copied to the right channel.

If set to Use Right Channel, then right channel audio data is copied to the left channel.

If set to Average Left and Right, no copying is done.

The Microsoft mixer component always averages both channels when converting to mono. If a signal is present on, say, the left channel only, the Average mode will average the left channel with the silent right channel, effectively halving the signal amplitude. Setting this control to Left results in only left channel data in the mono capture, with no amplitude drop.

Dual Mono

The Dual Mono window enables a special mode of the driver in which the left and right stereo pair inputs to a device are used as two separate mono channels serving two separate audio capture filters. A typical use for this mode is audio-only applications where stereo is not needed and maximum density of inputs per system is the driving factor.

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Contents Osprey 240e/450e User Guide Page Contents AVStream driver reference information Osprey 240e Environmental specifications Osprey 450e Page Warranties Limited WarrantyOverview Reseller Pass ThroughSystem requirements Minimum system requirementsInstallation Steps Installing the driverCustom installing AVStream Installing the video capture cardTo install the video capture card Digital Signature Not Found Window Setting Driver Properties Accessing the Osprey Config UtilityOspreyConfig’s initial processing sequence Initial OspreyConfig user interfaceSelecting a device for configuration Control used to open the properties Understanding the device properties window Osprey Video Device Properties window tabsVideo Decoder InputVideo Proc Amp RefSizeOspreyConfig utility to access devices Devices and global controlsInput tab Input tabVideo Present CancelVideo Input Video StandardOsprey 450e AV option hardware add-on-device Input tab without AV optionVideo input Osprey 450eVideo standard Video Standard fieldInput Format analog inputs Composite cameraVideoCheck VideoGraphVbiGraph VideoGraphVideo Proc Amp tab Video Proc Amp TabFrequency Anti Flicker Default Color EnablePowerLine BrightnessVideo Decoder tab Video Decoder tabLines detected Signal DetectedOutput Enable VCR InputHorizontal Horizontal DelayRefSize tab FormatHorizontal Format Square PixelsCCIR-601 Wide Horizontal DelaySignal WSS Use WideScreenSource Width Source WidthReference Size for Crop and Logo Placement Video Type Format HW or SW Adds CPU GranularityLine Ntsc Vertical Format Line Ntsc Vertical FormatSimulStream Currently UsingFilters tab DeinterlaceSimulStream SimulStream optionMultiple instances Osprey 240e/450e User Guide Inverse Telecine Adjust…Deinterlace Motion AdaptiveBackground − telecine and inverse telecine Currently Using group Current Using settingsAdaptive Deinterlace window Motion ThresholdFrame Algorithm Test Mode Restore DefaultsClose Osprey 240e/450e User Guide Device tab No-Video Test Pattern Buffers RequestedDiagnostic logging Diagnostic LoggingTypical section of data Device Info Board NumberingBoard Numbering Setting Driver Properties Closed Caption ExtrasTimecode Video Marking TimestampingCaptions tab Captions tabPin Select Render Ntsc Closed Captions On Video Render Logical White AsCC Pin CC PinLogo tab Enable Logo onFile and Color sub Tab Enable Key Color On File and Color Sub tabOsprey 240e/450e User Guide File and Color Pin SelectEnable Key Color Enable Key ColorWeighting Position and SizeOsprey 240e/450e User Guide Size and Crop tab Size and Crop tabReference Size Enable CroppingDefault Output Reference SizeGranularity Format Horizontal VerticalEnable Cropping Enable CroppingRecalc button Default Output Size Default Output SizePage AVStream driver reference information DirectShowAVStream Driver Reference Information Post-Processing mode Post-Processing modeAVStream Driver Reference Information Efficient Video Rendering Preview Pin to Video RendererPreview Pin to Overlay Mixer to Video Renderer Preview Pin to VMR7 Video Mixing RendererPreview Pin to VMR9 Some Data PointsAVStream Driver Reference Information Video standards and sizes Color formatsYUV format details Captioning via CC or VBI pins Closed captioning CCDirect CC rendering on video CC streaming interface Vertical Interval Timecode VitcVertical Blanking Interval VBI capture Timecode Video MarkingSelecting the audio source and input volume Audio driverAudio Driver Audio properties Audio propertiesAudio formats Audio configurationMono Source Mode Audio playbackDual Mono Audio level Input reference levelAppendix a Osprey hardware specifications Environmental specificationsOsprey 240e Osprey 240e long back plate Osprey 450e Osprey 450e back plateAppendix a Osprey Hardware Specifications Mini-DIN Signal RCA Connectors Appendix B Osprey 450e audio cablePage Appendix C Troubleshooting Color bars on video screenScrambled video image Poor video quality at large frame sizes Multiple horizontal lines across video imageCannot play back recorded audio Osprey 240e/450e User Guide Page Index Appendix C Troubleshooting Osprey 240e/450e User Guide Viewcast.com