User:BillWharrie/Device and Input selection on Mac

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Revision as of 19:33, 12 December 2010 by BillWharrie (talk | contribs) (iMac Intel Core 2 Duo 2.0 GHz 10.4.11: typo)
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Warning icon This page is a demonstration of the interaction between Device selection and Input selection on Mac. Specifically how the Input Selector on the Mixer Toolbar reacts to different device selections.
I'll talk about the Device Toolbar, but selections made in Devices Preferences, Recording, Device are the same.
Screenshots and discussion are of 1.3.13-alpha December 9 2010
This page will be deleted when this discussion is finished.

This also relates Bug 11

Mac G5 Dual 2 GHz 10.5.8

1) When selecting "Core Audio: Built-in Audio" in Device Toolbar, the Input Selector in Mixer Toolbar is active and selectable.
BuiltInAudioInput.png


2) When selecting anything other than "Core Audio: Built-in Audio" in Device Toolbar, the Input Selector in Mixer Toolbar disappears.
USBAudioInput.png

iMac Intel Core 2 Duo 2.0 GHz 10.4.11

1) The choices in Devices Toolbar:
IMacDeviceChoices.jpg


2) When "Core Audio: Built-in Microphone" is selected as the input Device, the Input Selector is active but has only one choice:
IMacInternalMic.jpg


3) When "Core Audio: Built-in Input" is selected as the input Device, the Input Selector is active but has only one choice:
IMacLineInput.jpg


4) When "Core Audio: USB Audio CODEC" is selected as the input Device, the Input Selector disappears:
IMacUSBInput.jpg

Note: This iMac has S/P-DIF optical inputs and outputs, however it appears that the "Digital Input" option is not displayed unless an optical digital device is connected.

PowerBook G4 1.67 GHz 10.4.11

1) The choices in Devices Toolbar:
PowerbookDeviceChoices.png


2) When "Core Audio: Built-in Input" is selected as the input Device, the Input Selector is active and has the following choices:
PowerBookInputChoices.png


3) When "Core Audio: USB Audio CODEC" is selected as the input Device, the Input Selector disappears:
PowerBookUSBDevice.png

Observations

Although the iMac and PowerBook are running 10.4.11, the "Built-in" inputs are handled differently. This could be down to different sound hardware in the two machines. The iMac uses an Intel chipset, while the PowerBook uses a TI chipset.

While the display of the Input Selector on the iMac when only one choice is available may be non-optimum, I don't think it rates a P2 bug designation.