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D-4
Variable:
subframesBetweenRepeats can be modified by:
1 / 2 = 50% slower (twice as slow)
1 / 3 = 33.3% slower
1 / 4 = 25% slower
1 / 5 = 20% slower
1 / 6 = 16.7% slower
and so on
…
See the following table for a summary on speed shifting.
Table D–2.
Speed Shifting Summary
Speed shift command
First parameter
(1 nibble)
Second parameter
(4 nibbles)
Result
0xA
0x1
> 1
Speed increases
0xA
0x0
0
Normal speed
0xA
0x0
< –1
Speed decreases
The value of the second parameter can range from 0x2 to 0x7FFF. While in-
creasing the speed, the parameter 0x2 represents the highest speed. Similar-
ly, while decreasing the speed, the parameter 0x2 represents the slowest
speed. To detect noticeable difference in the speed, the range of the second
parameter must be between 0x2 and 0x20.
To increase the speed by 100%, use the following sequence of commands (in-
cluding the parameter):
A, 1, 0, 0, 0, and 2.
Note:
The fifth bit of the data line is held low while sending the command
or the parameters.
Note:
The parameters set for a certain speed or pitch shift are destroyed
and must be reset to play speech for a different vocoder.
Summary of Contents for MSP53C691
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