[PATCH - ALSA - emu10k1] Add dB range to Bass and Treble controls for SB Live!

From: Raymond Yau <superquad.vortex2@gmail.com>
To: ALSA Development Mailing List <alsa-devel@alsa-project.org>,
	Takashi Iwai <tiwai@suse.de>
Subject: [PATCH - ALSA - emu10k1] Add dB range to Bass and Treble controls for SB Live!
Date: Fri, 20 May 2011 15:04:07 +0800	[thread overview]
Message-ID: <BANLkTimx7-3oeL-93Mq=MxjGZXsv9h+t6A@mail.gmail.com> (raw)

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As the "Wave", "Wave Surround" or "Front" Playback Volume must be
changed to 70% (i.e. -12 dB) so that distortion won't occur when
increase Bass and Treble from 50% to 100%, so the maximum gain in Bass
and Treble are +12 dB

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From 04e939a9faddf7d6700ddf581dc2068b0c7c5e9b Mon Sep 17 00:00:00 2001
From: Raymond Yau <superquad.vortex2@gmail.com>
Date: Fri, 20 May 2011 14:32:04 +0800
Subject: [PATCH - ALSA - emu10k1] Add dB range to Bass and Treble for SB Live!

As the "Wave", "Wave Surround" or "Front" Playback Volume must be changed to 70% (i.e. -12 dB) so that distortion won't occur when increase Bass and Treble from 50% to 100%, so the maximum gain in Bass and Treble are +12 dB

Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>

diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c
index 7a94014..dae4050 100644
--- a/sound/pci/emu10k1/emufx.c
+++ b/sound/pci/emu10k1/emufx.c
@@ -303,6 +303,9 @@ static const u32 db_table[101] = {
 static const DECLARE_TLV_DB_SCALE(snd_emu10k1_db_scale1, -4000, 40, 1);
 static const DECLARE_TLV_DB_LINEAR(snd_emu10k1_db_linear, TLV_DB_GAIN_MUTE, 0);
 
+/* EMU10K1 bass/treble db gain */
+static const DECLARE_TLV_DB_SCALE(snd_emu10k1_bass_treble_db_scale, -1200, 60, 0);
+
 static const u32 onoff_table[2] = {
 	0x00000000, 0x00000001
 };
@@ -2163,6 +2166,7 @@ static int __devinit _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
 	ctl->min = 0;
 	ctl->max = 40;
 	ctl->value[0] = ctl->value[1] = 20;
+	ctl->tlv = snd_emu10k1_bass_treble_db_scale;
 	ctl->translation = EMU10K1_GPR_TRANSLATION_BASS;
 	ctl = &controls[i + 1];
 	ctl->id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
@@ -2172,6 +2176,7 @@ static int __devinit _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
 	ctl->min = 0;
 	ctl->max = 40;
 	ctl->value[0] = ctl->value[1] = 20;
+	ctl->tlv = snd_emu10k1_bass_treble_db_scale;
 	ctl->translation = EMU10K1_GPR_TRANSLATION_TREBLE;
 
 #define BASS_GPR	0x8c
-- 
1.6.0.6


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