Legacy Document
Important: Sound Input Manager is deprecated as of Mac OS X v10.5. For new audio development in Mac OS X, use Core Audio. See the Audio page in the ADC Reference Library.
Inside Macintosh: Sound Manager
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Important: Sound Input Manager is deprecated as of Mac OS X v10.5. For new audio development in Mac OS X, use Core Audio. See the Audio page in the ADC Reference Library.
You can pass the gestaltSoundAttr selector to the Gestalt function to determine information about the sound input capabilities of a Macintosh computer.
CONST
gestaltSoundAttr = 'snd '; {sound attributes selector}
The Gestalt function returns information by setting or clearing bits in the response parameter. The bits relevant to the Sound Input Manager are defined by constants:
CONST
gestaltSoundIOMgrPresent = 3; {sound input routines available}
gestaltBuiltInSoundInput = 4; {built-in input hw available}
gestaltHasSoundInputDevice = 5; {sound input device available}
gestaltPlayAndRecord = 6; {built-in hw can play while recording}
gestalt16BitSoundIO = 7; {built-in hw can handle 16-bit data}
gestaltStereoInput = 8; {built-in hw can record stereo sounds}
gestaltLineLevelInput = 9; {built-in input hw needs line level}
Set if the Sound Input Manager is available.
Set if a built-in sound input device is available.
Set if a sound input device is available. This device can be either built-in or external.
Set if the built-in sound hardware is able to play and record sounds simultaneously. If this bit is clear, the built-in sound hardware can either play or record, but not do both at once. This bit is valid only if the gestaltBuiltInSoundInput bit is set, and it applies only to any built-in sound input and output hardware.
Set if the built-in sound hardware is able to play and record 16-bit samples. This indicates that built-in hardware necessary to handle 16-bit data is available.
Set if the built-in sound hardware can record stereo sounds.
Set if the built-in sound input port requires line level input.
For complete information about the Gestalt function, see the chapter "Gestalt Manager" in Inside Macintosh: Operating System Utilities .
Inside Macintosh: Sound Manager
| Previous | Chapter contents | Chapter top | Section top | Next |
Important: Sound Input Manager is deprecated as of Mac OS X v10.5. For new audio development in Mac OS X, use Core Audio. See the Audio page in the ADC Reference Library.