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- 4. _A_u_d_i_o__C_o_n_t_r_o_l__P_a_n_e_l
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- Audio Control Panel (invoked from the command line as
- _a_u_d_i_o_p_a_n_e_l(1)) provides a graphical user interface and
- command line interface for controlling and monitoring audio
- I/O device parameters.
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- 4.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
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- This section lists changes/additions to the Audio Control
- Panel between the IRIX 6.2 and IRIX 6.4 releases.
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- IRIX 6.4 continues use of the new, generalized version of
- the Audio Control Panel first included with IRIX 6.2, which
- has been designed to accommodate multiple audio I/O devices
- installed in the same system:
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- +o With the new requirement of having to manage multiple
- input and output devices, audiopanel's menu bar
- structure changed. Previously, the Input and Rate had
- their own top-level menus. Now, before adjusting the
- input source or sample rate for a particular device,
- the device must first be selected by clicking the right
- mouse button over a device panel. After the selection
- is made, the Selected menu contains submenus for
- modifying Input Source and Sample Rate. Availability
- of these submenus and/or entries on these submenus will
- vary depending on which device is currently selected.
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- +o The Options menu selection for Input (or Output)
- Sliders Independent has now moved to the Selected menu
- under the toggle entry Group Sliders. Audiopanel keeps
- track of the slider grouping status for each device
- independently.
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- +o For Indigo2 and Indy machines, the toggling of four-
- channel mode and stereo microphone as previously done
- in the Options menu. These functions have been moved
- to the Device Preferences Dialog for the AnalogIn
- device, This dialog can be reached by first selecting
- the AnalogIn device, then by choosing the
- Preferences... option in the Selected top-level menu.
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- +o Previous incarnations of audiopanel had a choice of a
- Digital Input in the Input source menu for Indy,
- Indigo2 and the Onyx Audio/Serial Option. Under the
- new audio architecture, the input source Digital Input
- is now handled as its own device, called Digital In ,
- which is independent of the Analog In device. Setting
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- the default input to the Digital In device on these
- machines will provide the same functionality as
- switching the previous audiopanel's input source to
- Digital In.
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- +o Previous incarnations of audiopanel had a Use Input
- Rate option as part of the output sample rate menu.
- Unfortunately, this convenience feature is not
- available in this newer version of audiopanel.
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- +o Previous incarnations of audiopanel had a Digital Input
- choice for output sample rates device by setting its
- sync source to AES In and matching its sample rate to
- the Digital In (or AES In ) device on the same audio
- subsystem.
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- +o It should be noted that digital output devices have no
- sliders to control gain and no signal meters, because
- gain control and signal monitoring on these devices is
- unsupported. A blank looking control panel for a
- digital output device is completely normal. Sample
- rates and input sources are still modifyable as they
- are appropriate for the device.
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- +o Audio controls for the Presenter Flat Panel display are
- no longer relegated to a separate window. Presenter
- Controls will now appear alongside those of the
- appropriate baseline Analog Out device on the system.
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- +o Normally, all outputs interfaces for a particular audio
- output device are active. If an output device supports
- the choice of directing output to a single output
- interface, the device's popup menu and Selected menu
- will have an additional Output Destination Menu, akin
- to the Input Source, allowing the user to select which
- output is to be active.
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- 4.2 _B_u_g__F_i_x_e_s
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- +o BUG 458608 - The apanel Selected->Make Default menu
- would give all the user interface indications that the
- Default Device was changed, however, with the insidious
- little side effect of not actually telling the audio
- system to change the Default Device.
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- +o BUG 469264 - Apanel's Device List panel would not
- always be able to accommodate long device names,
- especially those with subsystem names prepended. The
- Device List now is sized accordingly.
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- +o BUG 437617 - Apanel's command line would not accept
- fully qualified or typed names of audio resources (such
- as "RAD1.AES In" or "A3.Microphone", etc.). The command
- line can now handle the much more robust references
- that alGetResourceByName() provides.
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- +o BUG 415586 - Subsystem names now appear on sync sources
- when its appropriate to distinguish between similarly
- named, but distinct time bases.
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- +o BUG 423362 - Apanel would not recognize user-interface
- oriented command-line and resource file settings
- specified for default devices. Examples were -meteron
- -meteroff and resources effecting filter operations of
- the meters.
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- +o BUG 475753 - Apanel meters on digital devices no longer
- use a DC filter by default. Analog devices, however,
- still use a DC filter by default.
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- +o BUG 483191 - With DC filtering off, apanel's right
- meter would not always display correct information
- (only when the device was a stereo device).
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- +o BUG 481235 - Apanel's File->Revert menu would not turn
- the audio system back to its factory settings as
- indicated in the help. Now it does.
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- 4.3 _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
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- +o The minimum input slider position does not correspond
- to infinite attenuation on Indy and Indigo2. This is
- an audio hardware limitation.
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- . The In-Use indicator on the title bar for each device
- is known to not switch on or off correctly when the
- Default Output is changed. Restarting audiopanel has
- been known to clear up the problem.
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- +o Presenter gain controls are operable only when the
- device's sliders are ungrouped. Tone controls currently
- don't work just yet.
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- +o If a data file is opened for recovering audiopanel
- layout and system state that is invalid, the device
- panels currently in view will disappear. They can be
- restored by re-selecting them through the View pane.
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