INT 66 - IBMSND driver, DIGPAK - REPORT CURRENT SAMPLE ADDRESS AX = 068Dh Return: AX = current playback address Desc: determine what point in the audio data the playback has reached, for synchronization with video or animation effects Notes: this function applies to background playback only the reported address may be an approximation rather than the exact address SeeAlso: AX=068Ch,AX=0691h