void usage_help(void){printf("zgsmplay %s - " "(c) 1995-2000 Russell Marks for improbabledesigns.\n", ZGSMPLAY_VER);printf( " usage: zgsmplay [-hnrS] [-f frame] [-g gap] [start_dir | filename.gsm | filename1.gsm ...] -f set GSM frame to start from (default is 0), or (with `s' or `m' suffix) second/minute to start from. -g set pseudo-stereo echo length (`gap'). The units are number of samples at 22kHz and are scaled accordingly. The default is 250, and the maximum acceptable is 1024. -h this usage help. -n no snd_frag. Takes much longer to respond to keypresses (several seconds!) but breaks up *much* less, usually not at all, on a heavily-loaded machine. -r enable auto-repeat. -S use pseudo-stereo, which often sounds good with music. (It can make speech sound rather odd, though.) start_dir directory to start file selector in. filename.gsm single file to play; skips file selector entirely. filename1.gsm ... a number of files to play in order specified; also skips file selector.If standard input is not a terminal, zgsmplay non-interactively playsGSM data directly from stdin. Such usage implies `-n'. ");}