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OpenCloudOS-Kernel/sound/pci/emu10k1/tina2.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 14:55:05 +08:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
[ALSA] snd-emu10k1: Attenuate output volume to reduce distortion Modules: EMU10K1/EMU10K2 driver on Audigy 2 ZS Notebook. Set the master volume to about 6 or 8% in alsamixer. This will attenuate the output enough for better sound quality. Note: Only stereo enabled at present. The distortion is caused by the output path after the DSP adding 12dB gain to the output while still in digital mode, resulting in wrap around distortion. Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
2005-11-12 06:39:05 +08:00
/*
* Copyright (c) by James Courtier-Dutton <James@superbug.demon.co.uk>
[ALSA] emu10k1: Add support for Audigy4 (not Pro) Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
2006-04-10 00:36:39 +08:00
* Driver tina2 chips
* Version: 0.1
[ALSA] snd-emu10k1: Attenuate output volume to reduce distortion Modules: EMU10K1/EMU10K2 driver on Audigy 2 ZS Notebook. Set the master volume to about 6 or 8% in alsamixer. This will attenuate the output enough for better sound quality. Note: Only stereo enabled at present. The distortion is caused by the output path after the DSP adding 12dB gain to the output while still in digital mode, resulting in wrap around distortion. Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
2005-11-12 06:39:05 +08:00
*/
/********************************************************************************************************/
/* Audigy2 Tina2 (notebook) pointer-offset register set, accessed through the PTR2 and DATA2 registers */
/********************************************************************************************************/
#define TINA2_VOLUME 0x71 /* Attenuate playback volume to prevent distortion. */
/* The windows driver does not use this register,
* so it must use some other attenuation method.
* Without this, the output is 12dB too loud,
* resulting in distortion.
*/