Important: Inside Macintosh: Sound 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.
GetSpeechPitch
You can determine a speech channel's current speech pitch by using the GetSpeechPitch function.
FUNCTION GetSpeechPitch (chan: SpeechChannel; VAR pitch: Fixed) : OSErr;
chan
- The speech channel whose pitch you wish to determine.
pitch
- On exit, the current pitch of the voice in the speech channel, expressed as a fixed-point frequency value.
DESCRIPTION
TheGetSpeechPitch
function returns, in thepitch
parameter, the pitch of the speech channel specified by thechan
parameter. Typical voice frequencies range from around 90 hertz for a low-pitched male voice to perhaps 300 hertz for a high-pitched child's voice. These frequencies correspond to approximate pitch values in the ranges of 30.000 to 40.000 and 55.000 to 65.000, respectively. For information about the mathematical relationship between pitches and frequencies expressed in hertz, see "Speech Attributes" beginning on page 4-6.SPECIAL CONSIDERATIONS
You can call theGetSpeechPitch
function at interrupt time.ASSEMBLY-LANGUAGE INFORMATION
The trap macro and routine selector for theGetSpeechPitch
function are
Trap macro Selector _SoundDispatch
$0450000C RESULT CODES
noErr 0 No error invalidComponentID -3000 Speech channel is uninitialized or bad