Newton Developer Technical Information: Newton Programmer's Guide: 2.1 OS Addendum /

Chapter 7 - Sound / Sound Reference

Data Structures

Synthesized Sound Data Format

The synthesizer codec accepts sound frames whose samples slot contains a binary object of the class 'TDTMFCodec. The data format of the binary object is as follows (note this is a C structure). All values are 16 bits in length.

 type 'DTMF' {

unsigned short; /* Parameter block type, set to 1 */
unsigned short; /* Synthesis type (0-4) */
unsigned short; /* Reserved, set to 0 */
unsigned short; /* loop count */
unsigned short = $$CountOf(DTMFTones); /* Number of tone blocks */
   wide array DTMFTones { /* specify 1 to 12 tone blocks */
   unsigned short; /* frequency integer part */
   unsigned short; /* frequency fractional part */
   unsigned short; /* sustain amplitude */
   unsigned short; /* leading silence in ms */
   unsigned short; /* attack in ms */
   unsigned short; /* decay in ms */
   unsigned short; /* sustain in ms */
   unsigned short; /* release in ms */
   unsigned short; /* peak amplitude */
   unsigned short; /* trailing silence in ms */
   };
 };

© Apple Computer, Inc.
26 APR 1997

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