typedef struct echosc1waveformat_tag {
        WAVEFORMATEX    wfx;
} ECHOSC1WAVEFORMAT;

typedef ECHOSC1WAVEFORMAT       *PECHOSC1WAVEFORMAT;

typedef ECHOSC1WAVEFORMAT NEAR *NPECHOSC1WAVEFORMAT;

typedef ECHOSC1WAVEFORMAT FAR  *LPECHOSC1WAVEFORMAT;