1 ============================================== 1 ==================================================
2 E-MU Digital Audio System mixer / default DSP 2 E-MU Digital Audio System mixer / default DSP code
3 ============================================== 3 ==================================================
4 4
5 This document covers the E-MU 0404/1010/1212/1 5 This document covers the E-MU 0404/1010/1212/1616/1820 PCI/PCI-e/CardBus
6 cards. 6 cards.
7 7
8 These cards use regular EMU10K2 (SoundBlaster 8 These cards use regular EMU10K2 (SoundBlaster Audigy) chips, but with an
9 alternative front-end geared towards semi-prof 9 alternative front-end geared towards semi-professional studio recording.
10 10
11 This document is based on audigy-mixer.rst. 11 This document is based on audigy-mixer.rst.
12 12
13 13
14 Hardware compatibility 14 Hardware compatibility
15 ====================== 15 ======================
16 16
17 The EMU10K2 chips have a very short capture FI 17 The EMU10K2 chips have a very short capture FIFO, which makes recording
18 unreliable if the card's PCI bus requests are 18 unreliable if the card's PCI bus requests are not handled with the
19 appropriate priority. 19 appropriate priority.
20 This is the case on more modern motherboards, 20 This is the case on more modern motherboards, where the PCI bus is only a
21 secondary peripheral, rather than the actual a 21 secondary peripheral, rather than the actual arbiter of device access.
22 In particular, I got recording glitches during 22 In particular, I got recording glitches during simultaneous playback on an
23 Intel DP55 board (memory controller in the CPU 23 Intel DP55 board (memory controller in the CPU), but had success with an
24 Intel DP45 board (memory controller in the nor 24 Intel DP45 board (memory controller in the north bridge).
25 25
26 The PCI Express variants of these cards (which 26 The PCI Express variants of these cards (which have a PCI bridge on board,
27 but are otherwise identical) may be less probl 27 but are otherwise identical) may be less problematic.
28 28
29 29
30 Driver capabilities 30 Driver capabilities
31 =================== 31 ===================
32 32
33 This driver supports only 16-bit 44.1/48 kHz o 33 This driver supports only 16-bit 44.1/48 kHz operation. The multi-channel
34 device (see emu10k1-jack.rst) additionally sup 34 device (see emu10k1-jack.rst) additionally supports 24-bit capture.
35 35
36 A patchset to enhance the driver is available 36 A patchset to enhance the driver is available from `a GitHub repository
37 <https://github.com/ossilator/linux/tree/ossis 37 <https://github.com/ossilator/linux/tree/ossis-emu10k1>`_.
38 Its multi-channel device supports 24-bit for b 38 Its multi-channel device supports 24-bit for both playback and capture,
39 and also supports full 88.2/96/176.4/192 kHz o 39 and also supports full 88.2/96/176.4/192 kHz operation.
40 It is not going to be upstreamed due to a fund 40 It is not going to be upstreamed due to a fundamental disagreement about
41 what constitutes a good user experience. 41 what constitutes a good user experience.
42 42
43 43
44 Digital mixer controls 44 Digital mixer controls
45 ====================== 45 ======================
46 46
47 Note that the controls work as attenuators: th 47 Note that the controls work as attenuators: the maximum value is the neutral
48 position leaving the signal unchanged. Note th 48 position leaving the signal unchanged. Note that if the same destination is
49 mentioned in multiple controls, the signal is 49 mentioned in multiple controls, the signal is accumulated and can be clipped
50 (set to maximal or minimal value without check 50 (set to maximal or minimal value without checking for overflow).
51 51
52 Explanation of used abbreviations: 52 Explanation of used abbreviations:
53 53
54 DAC 54 DAC
55 digital to analog converter 55 digital to analog converter
56 ADC 56 ADC
57 analog to digital converter 57 analog to digital converter
58 LFE 58 LFE
59 low frequency effects (used as subwoof 59 low frequency effects (used as subwoofer signal)
60 IEC958 60 IEC958
61 S/PDIF 61 S/PDIF
62 FX-bus 62 FX-bus
63 the EMU10K2 chip has an effect bus con 63 the EMU10K2 chip has an effect bus containing 64 accumulators.
64 Each of the synthesizer voices can fee 64 Each of the synthesizer voices can feed its output to these accumulators
65 and the DSP microcontroller can operat 65 and the DSP microcontroller can operate with the resulting sum.
66 66
67 name='Clock Source',index=0 67 name='Clock Source',index=0
68 --------------------------- 68 ---------------------------
69 This control allows switching the word clock b 69 This control allows switching the word clock between interally generated
70 44.1 or 48 kHz, or a number of external source 70 44.1 or 48 kHz, or a number of external sources.
71 71
72 Note: the sources for the 1616 CardBus card ar 72 Note: the sources for the 1616 CardBus card are unclear. Please report your
73 findings. 73 findings.
74 74
75 name='Clock Fallback',index=0 75 name='Clock Fallback',index=0
76 ----------------------------- 76 -----------------------------
77 This control determines the internal clock whi 77 This control determines the internal clock which the card switches to when
78 the selected external clock source is/becomes 78 the selected external clock source is/becomes invalid.
79 79
80 name='DAC1 0202 14dB PAD',index=0, etc. 80 name='DAC1 0202 14dB PAD',index=0, etc.
81 --------------------------------------- 81 ---------------------------------------
82 Output attenuation controls. Not available on 82 Output attenuation controls. Not available on 0404 cards.
83 83
84 name='ADC1 14dB PAD 0202',index=0, etc. 84 name='ADC1 14dB PAD 0202',index=0, etc.
85 --------------------------------------- 85 ---------------------------------------
86 Input attenuation controls. Not available on 0 86 Input attenuation controls. Not available on 0404 cards.
87 87
88 name='Optical Output Mode',index=0 88 name='Optical Output Mode',index=0
89 ---------------------------------- 89 ----------------------------------
90 Switches the TOSLINK output port between S/PDI 90 Switches the TOSLINK output port between S/PDIF and ADAT.
91 Not available on 0404 cards (fixed to S/PDIF). 91 Not available on 0404 cards (fixed to S/PDIF).
92 92
93 name='Optical Input Mode',index=0 93 name='Optical Input Mode',index=0
94 --------------------------------- 94 ---------------------------------
95 Switches the TOSLINK input port between S/PDIF 95 Switches the TOSLINK input port between S/PDIF and ADAT.
96 Not available on 0404 cards (fixed to S/PDIF). 96 Not available on 0404 cards (fixed to S/PDIF).
97 97
98 name='PCM Front Playback Volume',index=0 98 name='PCM Front Playback Volume',index=0
99 ---------------------------------------- 99 ----------------------------------------
100 This control is used to attenuate samples from 100 This control is used to attenuate samples from left and right front PCM FX-bus
101 accumulators. ALSA uses accumulators 8 and 9 f 101 accumulators. ALSA uses accumulators 8 and 9 for left and right front PCM
102 samples for 5.1 playback. The result samples a 102 samples for 5.1 playback. The result samples are forwarded to the DSP 0 & 1
103 playback channels. 103 playback channels.
104 104
105 name='PCM Surround Playback Volume',index=0 105 name='PCM Surround Playback Volume',index=0
106 ------------------------------------------- 106 -------------------------------------------
107 This control is used to attenuate samples from 107 This control is used to attenuate samples from left and right surround PCM FX-bus
108 accumulators. ALSA uses accumulators 2 and 3 f 108 accumulators. ALSA uses accumulators 2 and 3 for left and right surround PCM
109 samples for 5.1 playback. The result samples a 109 samples for 5.1 playback. The result samples are forwarded to the DSP 2 & 3
110 playback channels. 110 playback channels.
111 111
112 name='PCM Side Playback Volume',index=0 112 name='PCM Side Playback Volume',index=0
113 --------------------------------------- 113 ---------------------------------------
114 This control is used to attenuate samples from 114 This control is used to attenuate samples from left and right side PCM FX-bus
115 accumulators. ALSA uses accumulators 14 and 15 115 accumulators. ALSA uses accumulators 14 and 15 for left and right side PCM
116 samples for 7.1 playback. The result samples a 116 samples for 7.1 playback. The result samples are forwarded to the DSP 6 & 7
117 playback channels. 117 playback channels.
118 118
119 name='PCM Center Playback Volume',index=0 119 name='PCM Center Playback Volume',index=0
120 ----------------------------------------- 120 -----------------------------------------
121 This control is used to attenuate samples from 121 This control is used to attenuate samples from the center PCM FX-bus accumulator.
122 ALSA uses accumulator 6 for center PCM samples 122 ALSA uses accumulator 6 for center PCM samples for 5.1 playback. The result samples
123 are forwarded to the DSP 4 playback channel. 123 are forwarded to the DSP 4 playback channel.
124 124
125 name='PCM LFE Playback Volume',index=0 125 name='PCM LFE Playback Volume',index=0
126 -------------------------------------- 126 --------------------------------------
127 This control is used to attenuate samples from 127 This control is used to attenuate samples from the LFE PCM FX-bus accumulator.
128 ALSA uses accumulator 7 for LFE PCM samples fo 128 ALSA uses accumulator 7 for LFE PCM samples for 5.1 playback. The result samples
129 are forwarded to the DSP 5 playback channel. 129 are forwarded to the DSP 5 playback channel.
130 130
131 name='PCM Playback Volume',index=0 131 name='PCM Playback Volume',index=0
132 ---------------------------------- 132 ----------------------------------
133 This control is used to attenuate samples from 133 This control is used to attenuate samples from left and right PCM FX-bus
134 accumulators. ALSA uses accumulators 0 and 1 f 134 accumulators. ALSA uses accumulators 0 and 1 for left and right PCM samples for
135 stereo playback. The result samples are forwar 135 stereo playback. The result samples are forwarded to the virtual stereo mixer.
136 136
137 name='PCM Capture Volume',index=0 137 name='PCM Capture Volume',index=0
138 --------------------------------- 138 ---------------------------------
139 This control is used to attenuate samples from 139 This control is used to attenuate samples from left and right PCM FX-bus
140 accumulators. ALSA uses accumulators 0 and 1 f 140 accumulators. ALSA uses accumulators 0 and 1 for left and right PCM.
141 The result is forwarded to the standard captur 141 The result is forwarded to the standard capture PCM device.
142 142
143 name='Music Playback Volume',index=0 143 name='Music Playback Volume',index=0
144 ------------------------------------ 144 ------------------------------------
145 This control is used to attenuate samples from 145 This control is used to attenuate samples from left and right MIDI FX-bus
146 accumulators. ALSA uses accumulators 4 and 5 f 146 accumulators. ALSA uses accumulators 4 and 5 for left and right MIDI samples.
147 The result samples are forwarded to the virtua 147 The result samples are forwarded to the virtual stereo mixer.
148 148
149 name='Music Capture Volume',index=0 149 name='Music Capture Volume',index=0
150 ----------------------------------- 150 -----------------------------------
151 These controls are used to attenuate samples f 151 These controls are used to attenuate samples from left and right MIDI FX-bus
152 accumulator. ALSA uses accumulators 4 and 5 fo 152 accumulator. ALSA uses accumulators 4 and 5 for left and right MIDI samples.
153 The result is forwarded to the standard captur 153 The result is forwarded to the standard capture PCM device.
154 154
155 name='Front Playback Volume',index=0 155 name='Front Playback Volume',index=0
156 ------------------------------------ 156 ------------------------------------
157 This control is used to attenuate samples from 157 This control is used to attenuate samples from the virtual stereo mixer.
158 The result samples are forwarded to the DSP 0 158 The result samples are forwarded to the DSP 0 & 1 playback channels.
159 159
160 name='Surround Playback Volume',index=0 160 name='Surround Playback Volume',index=0
161 --------------------------------------- 161 ---------------------------------------
162 This control is used to attenuate samples from 162 This control is used to attenuate samples from the virtual stereo mixer.
163 The result samples are forwarded to the DSP 2 163 The result samples are forwarded to the DSP 2 & 3 playback channels.
164 164
165 name='Side Playback Volume',index=0 165 name='Side Playback Volume',index=0
166 ----------------------------------- 166 -----------------------------------
167 This control is used to attenuate samples from 167 This control is used to attenuate samples from the virtual stereo mixer.
168 The result samples are forwarded to the DSP 6 168 The result samples are forwarded to the DSP 6 & 7 playback channels.
169 169
170 name='Center Playback Volume',index=0 170 name='Center Playback Volume',index=0
171 ------------------------------------- 171 -------------------------------------
172 This control is used to attenuate samples from 172 This control is used to attenuate samples from the virtual stereo mixer.
173 The result samples are forwarded to the DSP 4 173 The result samples are forwarded to the DSP 4 playback channel.
174 174
175 name='LFE Playback Volume',index=0 175 name='LFE Playback Volume',index=0
176 ---------------------------------- 176 ----------------------------------
177 This control is used to attenuate samples from 177 This control is used to attenuate samples from the virtual stereo mixer.
178 The result samples are forwarded to the DSP 5 178 The result samples are forwarded to the DSP 5 playback channel.
179 179
180 name='Tone Control - Switch',index=0 180 name='Tone Control - Switch',index=0
181 ------------------------------------ 181 ------------------------------------
182 This control turns the tone control on or off. 182 This control turns the tone control on or off. The samples forwarded to
183 the DSP playback channels are affected. 183 the DSP playback channels are affected.
184 184
185 name='Tone Control - Bass',index=0 185 name='Tone Control - Bass',index=0
186 ---------------------------------- 186 ----------------------------------
187 This control sets the bass intensity. There is 187 This control sets the bass intensity. There is no neutral value!!
188 When the tone control code is activated, the s 188 When the tone control code is activated, the samples are always modified.
189 The closest value to pure signal is 20. 189 The closest value to pure signal is 20.
190 190
191 name='Tone Control - Treble',index=0 191 name='Tone Control - Treble',index=0
192 ------------------------------------ 192 ------------------------------------
193 This control sets the treble intensity. There 193 This control sets the treble intensity. There is no neutral value!!
194 When the tone control code is activated, the s 194 When the tone control code is activated, the samples are always modified.
195 The closest value to pure signal is 20. 195 The closest value to pure signal is 20.
196 196
197 name='Master Playback Volume',index=0 197 name='Master Playback Volume',index=0
198 ------------------------------------- 198 -------------------------------------
199 This control is used to attenuate samples for 199 This control is used to attenuate samples for all DSP playback channels.
200 200
201 name='EMU Capture Volume',index=0 201 name='EMU Capture Volume',index=0
202 ---------------------------------- 202 ----------------------------------
203 This control is used to attenuate samples from 203 This control is used to attenuate samples from the DSP 0 & 1 capture channels.
204 The result is forwarded to the standard captur 204 The result is forwarded to the standard capture PCM device.
205 205
206 name='DAC Left',index=0, etc. 206 name='DAC Left',index=0, etc.
207 ----------------------------- 207 -----------------------------
208 Select the source for the given physical audio 208 Select the source for the given physical audio output. These may be physical
209 inputs, playback channels (DSP xx, specified a 209 inputs, playback channels (DSP xx, specified as a decimal number), or silence.
210 210
211 name='DSP x',index=0 211 name='DSP x',index=0
212 -------------------- 212 --------------------
213 Select the source for the given capture channe 213 Select the source for the given capture channel (specified as a hexadecimal
214 digit). Same options as for the physical audio 214 digit). Same options as for the physical audio outputs.
215 215
216 216
217 PCM stream related controls 217 PCM stream related controls
218 =========================== 218 ===========================
219 219
220 These controls are described in audigy-mixer.r 220 These controls are described in audigy-mixer.rst.
221 221
222 222
223 MANUALS/PATENTS 223 MANUALS/PATENTS
224 =============== 224 ===============
225 225
226 See sb-live-mixer.rst. 226 See sb-live-mixer.rst.
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