diff -Naur wavplay-1.4/main.c wavplay-1.4-p/main.c
--- wavplay-1.4/main.c	Sat Dec  4 01:06:42 1999
+++ wavplay-1.4-p/main.c	Mon May 12 19:56:20 2003
@@ -101,6 +101,7 @@
 	printf("\t-%c\tLock for record.\n",OPF_RECD_LOCK);
 	printf("\t-%c\tUnlock for record.\n",OPF_RECD_UNLOCK);
 	printf("\t-%c dev\tOverride default of %s\n",OPF_DEVICE,AUDIODEV);
+	printf("\t-%c\tOpen device in non-blocking mode.\n",OPF_NONBLOCK);
 
 	if ( opr_mode != OprRecord )
 		printf("\t-%c\tDisplay info about wav file(s) only\n",OPF_INFO);
@@ -212,7 +213,7 @@
 		OPF_INFO, OPF_HELP, OPF_QUIET, OPF_SAMPRATE,':', OPF_STEREO, OPF_MONO,
 		OPF_TIME,':', OPF_DATABITS,':', OPF_IPCKEY,':', OPF_RESET,
 		OPF_PLAY_LOCK, OPF_PLAY_UNLOCK, OPF_RECD_LOCK, OPF_RECD_UNLOCK,
-		OPF_DEBUG, OPF_VERSION, OPF_DEVICE,':', 0 };
+		OPF_DEBUG, OPF_VERSION, OPF_DEVICE,':', OPF_NONBLOCK, 0 };
 #ifndef USE_GETOPT_STD
 	int optx;				/* Option index */
 	char *cp;
@@ -261,6 +262,10 @@
 		case OPF_DEVICE :		/* -d device_path */
 			env_AUDIODEV = optarg;	/* Override environment variable */
 			break;		
+		
+		case OPF_NONBLOCK :		/* -n ; non-blocking */
+			wavopts.NonBlock.optChar = (char) optch;
+			break;
 
 		case OPF_PLAY_LOCK :		/* -l ; lock play lock request */
 		case OPF_PLAY_UNLOCK :		/* -u ; unlock play lock request */
diff -Naur wavplay-1.4/recplay.c wavplay-1.4-p/recplay.c
--- wavplay-1.4/recplay.c	Sat Dec  4 01:06:42 1999
+++ wavplay-1.4-p/recplay.c	Mon May 12 19:58:29 2003
@@ -121,7 +121,10 @@
 			/*
 			 * If not -i mode, play the file:
 			 */
-			if ( (dfile = OpenDSP(wfile,O_WRONLY,v_erf)) == NULL )
+			if ( (dfile = OpenDSP(wfile,O_WRONLY |
+				(wavopts->NonBlock.optChar == OPF_NONBLOCK
+				? O_NDELAY
+				: 0) ,v_erf)) == NULL )
 				goto errxit;
 
 			if ( PlayDSP(dfile,wfile,svr_work_proc,v_erf) )
diff -Naur wavplay-1.4/wavplay.1 wavplay-1.4-p/wavplay.1
--- wavplay-1.4/wavplay.1	Sat Dec  4 01:06:42 1999
+++ wavplay-1.4-p/wavplay.1	Mon May 12 19:59:44 2003
@@ -20,6 +20,7 @@
 .RB [ -L ]
 .RB [ -U ]
 .RB [ -V, --version ]
+.RB [ -n ]
 .RI [ input-files ]
 .PP
 .B wavrec
@@ -41,6 +42,7 @@
 .RB [ -L ]
 .RB [ -U ]
 .RB [ -V, --version ]
+.RB [ -n ]
 .RI [ output-file ]
 .PP
 .SH DESCRIPTION
@@ -113,6 +115,9 @@
 .TP
 .BI \--version
 same as -V.
+.TP
+.BI \-n
+use non-blocking open() call on device.
 
 .SH BUGS
 .B wavplay
diff -Naur wavplay-1.4/wavplay.h wavplay-1.4-p/wavplay.h
--- wavplay-1.4/wavplay.h	Mon May 12 19:42:44 2003
+++ wavplay-1.4-p/wavplay.h	Mon May 12 19:54:59 2003
@@ -147,6 +147,7 @@
 #define OPF_RECD_UNLOCK	'U'			/* -U ; unlock record option */
 #define OPF_DEBUG	'x'			/* -x ; debug option */
 #define OPF_VERSION	'V'			/* -V ; version and copyright */
+#define OPF_NONBLOCK	'n'			/* -n ; open in non-blocking mode */
 
 /*
  * Types internal to wavplay, in an attempt to isolate ourselves from
@@ -231,6 +232,7 @@
 	UInt32	Seconds;			/* Time limited to this many seconds, else zero */
         UInt32  StartSample;                    /* Sample to start playback with */
 	int	ipc;				/* Semaphore IPC ID */
+	FlgOpt	NonBlock;			/* -n option flag */
 } WavPlayOpts;
 
 /*