HID Usage Tables Document 1.1 - C. Scott Ananian

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66 Universal Serial Bus HID Usage Tablesbutton.Track NormalSlow TrackingFrame ForwardFrame BackOSC – Sets media tracking to default or automatic value.LC – Adjusts media slow tracking.RTC – Moves forward one video frame.RTC – Moves back one video frame.14.8 Search ControlsSearch controls either place a physical flag, index or mark on the magnetic media, or use the position orframe counter to flag points of interest. The search controls allow identifying and moving between thesepoints of interest.MarkClear MarkRepeat From MarkReturn To MarkSearch Mark ForwardSearch MarkBackwardsCounter ResetShow CounterOSC – Marks a reference point on the media. Synonymous with the “countermemory” function found on some transport devices.OSC – Removes a marked reference point from the media.OOC – Marks the current position as the end of the block and repeat-plays theblock starting from the marked beginning of the block.OSC – Positions at the last detected mark and plays.OSC – Searches forward for a mark.OSC – Searches backward for a mark.OSC – Resets the time, position, or frame counter.OSC – Toggles between the position counter and the time display.14.9 Audio Controls14.9.1 VolumeAn application should check the Volume, Volume Increment and Volume Decrement usages whendetermining whether a device supports volume controls.VolumeVolume IncrementVolume DecrementMuteLC – Audio volume control.RTC – Asserting this control increments the current value of audio volumeuntil the maximum value is reached. It is typically implemented as a singlebutton.RTC – Asserting this control decrements the current value of audio volumeuntil the minimum value is reached. It is typically implemented as a singlebutton.OOC – Audio mute control. Sets the audio output level to the minimum valuewithout affecting the current volume level. When Mute is disabled, theprevious audio level will be restored.14.9.2 BalanceAn application should check the Balance, Balance Right and Balance Left usages when determining whethera device supports balance controls.Version 1.1 April 8, 1999
Universal Serial Bus HID Usage Tables 67BalanceBalance RightBalance LeftLC – Audio balance control.RTC – Asserting this control adjusts the audio output towards the rightchannel until the maximum value is reached. It is typically implemented as asingle button.RTC – Asserting this control adjusts the audio to the left channel until themaximum value is reached. It is typically implemented as a single button.14.9.3 BassAn application should check the Bass, Bass Increment and Bass Decrement usages when determiningwhether a device supports bass controls.BassBass IncrementBass DecrementBass BoostLC – Audio bass control.RTC – Asserting this control increments the current value of the audio basscontrol until the maximum value is reached. It is typically implemented as asingle button.RTC – Asserting this control decrements the current value of the audio basscontrol until the minimum value is reached. It is typically implemented as asingle button.OOC – Enables audio bass boost.14.9.4 TrebleAn application should check the Treble, Treble Increment and Treble Decrement usages when determiningwhether a device supports treble controls.TrebleTreble IncrementTreble DecrementLC – Audio treble control.RTC – Asserting this control increments the current value of the audio treblecontrol until the maximum value is reached. It is typically implemented as asingle button.RTC – Asserting this control decrements the current value of the audio treblecontrol until the minimum value is reached. It is typically implemented as asingle button.14.9.5 OtherSurround ModeLoudnessMPXOSC – Steps through surround mode options.OOC – Applies boost to audio bass and treble.OOC – Enables stereo multiplexer.14.10 Speed ControlsSpeed SelectOSC – Cycles through media speed options.Playback SpeedStandard PlayNAry – A collection of controls that allow adjustment of playback speed (inunits relative to normal playback speed). Contains the selectors Standard,Long, and Extended Play.Sel – Selects the VCR’s “SP” recording speed.Version 1.1 April 8, 1999
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HID Usage Tables Document 1.1 - C. Scott Ananian

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