/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _ULTRASOUND_H_ #define _ULTRASOUND_H_ /* * ultrasound.h - Macros for programming the Gravis Ultrasound * These macros are extremely device dependent * and not portable.
*/ /* * Copyright (C) by Hannu Savolainen 1993-1997 * * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) * Version 2 (June 1991). See the "COPYING" file distributed with this software * for more info.
*/
/* * Private events for Gravis Ultrasound (GUS) * * Format: * byte 0 - SEQ_PRIVATE (0xfe) * byte 1 - Synthesizer device number (0-N) * byte 2 - Command (see below) * byte 3 - Voice number (0-31) * bytes 4 and 5 - parameter P1 (unsigned short) * bytes 6 and 7 - parameter P2 (unsigned short) * * Commands: * Each command affects one voice defined in byte 3. * Unused parameters (P1 and/or P2 *MUST* be initialized to zero). * _GUS_NUMVOICES - Sets max. number of concurrent voices (P1=14-31, default 16) * _GUS_VOICESAMPLE- ************ OBSOLETE ************* * _GUS_VOICEON - Starts voice (P1=voice mode) * _GUS_VOICEOFF - Stops voice (no parameters) * _GUS_VOICEFADE - Stops the voice smoothly. * _GUS_VOICEMODE - Alters the voice mode, don't start or stop voice (P1=voice mode) * _GUS_VOICEBALA - Sets voice balance (P1, 0=left, 7=middle and 15=right, default 7) * _GUS_VOICEFREQ - Sets voice (sample) playback frequency (P1=Hz) * _GUS_VOICEVOL - Sets voice volume (P1=volume, 0xfff=max, 0xeff=half, 0x000=off) * _GUS_VOICEVOL2 - Sets voice volume (P1=volume, 0xfff=max, 0xeff=half, 0x000=off) * (Like GUS_VOICEVOL but doesn't change the hw * volume. It just updates volume in the voice table). * * _GUS_RAMPRANGE - Sets limits for volume ramping (P1=low volume, P2=high volume) * _GUS_RAMPRATE - Sets the speed for volume ramping (P1=scale, P2=rate) * _GUS_RAMPMODE - Sets the volume ramping mode (P1=ramping mode) * _GUS_RAMPON - Starts volume ramping (no parameters) * _GUS_RAMPOFF - Stops volume ramping (no parameters) * _GUS_VOLUME_SCALE - Changes the volume calculation constants * for all voices.
*/
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