Asterisk 对wav格式的支持

经过测试wav格式文件仅支持PCM 8000kHz 16bit 单声道，非常蛋疼的一个原因，排查了好久！

关于C#支持的一些格式（Mono 单声道 、Stereo 立体声道）

// Standard PCM wave formats

SAFT8kHz8BitMono = 4

SAFT8kHz8BitStereo = 5

SAFT8kHz16BitMono = 6

SAFT8kHz16BitStereo = 7

SAFT11kHz8BitMono = 8

SAFT11kHz8BitStereo = 9

SAFT11kHz16BitMono = 10

SAFT11kHz16BitStereo = 11

SAFT12kHz8BitMono = 12

SAFT12kHz8BitStereo = 13

SAFT12kHz16BitMono = 14

SAFT12kHz16BitStereo = 15

SAFT16kHz8BitMono = 16

SAFT16kHz8BitStereo = 17

SAFT16kHz16BitMono = 18

SAFT16kHz16BitStereo = 19

SAFT22kHz8BitMono = 20

SAFT22kHz8BitStereo = 21

SAFT22kHz16BitMono = 22

SAFT22kHz16BitStereo = 23

SAFT24kHz8BitMono = 24

SAFT24kHz8BitStereo = 25

SAFT24kHz16BitMono = 26

SAFT24kHz16BitStereo = 27

SAFT32kHz8BitMono = 28

SAFT32kHz8BitStereo = 29

SAFT32kHz16BitMono = 30

SAFT32kHz16BitStereo = 31

SAFT44kHz8BitMono = 32

SAFT44kHz8BitStereo = 33

SAFT44kHz16BitMono = 34

SAFT44kHz16BitStereo = 35

SAFT48kHz8BitMono = 36

SAFT48kHz8BitStereo = 37

SAFT48kHz16BitMono = 38

SAFT48kHz16BitStereo = 39

// TrueSpeech format
SAFTTrueSpeech_8kHz1BitMono = 40

// A-Law formats
SAFTCCITT_ALaw_8kHzMono = 41
SAFTCCITT_ALaw_8kHzStereo = 42
SAFTCCITT_ALaw_11kHzMono = 43
SAFTCCITT_ALaw_11kHzStereo = 4
SAFTCCITT_ALaw_22kHzMono = 44
SAFTCCITT_ALaw_22kHzStereo = 45
SAFTCCITT_ALaw_44kHzMono = 46
SAFTCCITT_ALaw_44kHzStereo = 47

// u-Law formats
SAFTCCITT_uLaw_8kHzMono = 48
SAFTCCITT_uLaw_8kHzStereo = 49
SAFTCCITT_uLaw_11kHzMono = 50
SAFTCCITT_uLaw_11kHzStereo = 51
SAFTCCITT_uLaw_22kHzMono = 52
SAFTCCITT_uLaw_22kHzStereo = 53
SAFTCCITT_uLaw_44kHzMono = 54
SAFTCCITT_uLaw_44kHzStereo = 55
SAFTADPCM_8kHzMono = 56
SAFTADPCM_8kHzStereo = 57
SAFTADPCM_11kHzMono = 58
SAFTADPCM_11kHzStereo = 59
SAFTADPCM_22kHzMono = 60
SAFTADPCM_22kHzStereo = 61
SAFTADPCM_44kHzMono = 62
SAFTADPCM_44kHzStereo = 63

// GSM 6.10 formats
SAFTGSM610_8kHzMono = 64
SAFTGSM610_11kHzMono = 65
SAFTGSM610_22kHzMono = 66
SAFTGSM610_44kHzMono = 67

// Other formats
SAFTNUM_FORMATS = 68

C#源码下载：http://files.cnblogs.com/files/yimu/Speak2.rar