XformID (NT Wavedriver)
The XformID (NT Wavedriver) entry provides voice functionality for Windows 2000 and later versions of the operating system. It specifies the serial wave format.
Format
Two-byte value.
Examples
HKR, WaveDriver, XformID , 1, 01, 00
Remarks
| XformID Value | Meaning |
|---|---|
Null transform, no conversion. |
0x0000 |
4-bit Rockwell ADPCM 7200 Hz format. |
0x0001 |
4-bit IMA ADPCM 4800 Hz format. |
0x0002 |
4-bit IMA ADPCM 7200 Hz format. |
0x0003 |
4-bit IMA ADPCM 8000 Hz format. |
0x0004 |
Reserved. |
0x0005 |
Reserved. |
0x0006 |
8-bit unsigned linear PCM at 7200 Hz format. |
0x0007 |
8-bit unsigned linear PCM at 8000 Hz format. |
0x0008 |
4-bit Rockwell ADPCM 7200 Hz format, without fixed gain increase. |
0x0009 |
8 bit u-law (G.711) at 8000 Hz. |
0x0010 |
8 bit A-law (G.711) at 8000 Hz. |
0x0011 |
This command is placed only in the modem INF file. This command is not placed in a serial wave driver INF file because Windows 2000 and later versions of the operating system do not use a serial wave driver INF file.
In addition, the following keys collectively are found in a modem INF file that is enabled for voice functionality in Windows 2000 and later versions of the operating system:
XformID (NT Wavedriver)
WaveHardwareID (NT Wavedriver)
The Windows 2000 VoiceProfile bit (0x02000000) should also be enabled.
See also