p += n;
send_sysex(u_char *p, u_int l){	seq_event_rec event;	u_int n;	event.arr[0] = SEQ_SYSEX;	event.arr[1] = unit;	do {		n = SYSEX_CHUNK;		if (l < n) {			memset(&event.arr[2], 0xff, SYSEX_CHUNK);			n = l;		}		memcpy(&event.arr[2], p, n);		send_event(&event);		l -= n;	} while (l > 0);}