TLV320AIC3104: TLV320AIC3104 output volume is very very low in headphone & loudspeaker

Hello Satish,

Are you sending a full scale digital input to the CODEC? The device has digital volume control registers but they are only for attenuation. With a full scale digital inputs, the analog full scale output is 2Vpp. 

Regards,

Aaron Estrada

Hi Aaron,

we are not sending full scale digital data.

Which are the digital volume control registers?Please let us know so that will configure those registers to get loud volume.

Regards,

Satish

Hi Aaron,

Below are the register values,please have look.

< ql_i2c_init=3 >
0x00, 000 = 0x00
0x01, 001 = 0x00
0x02, 002 = 0xaa
0x03, 003 = 0x91
0x04, 004 = 0xc0
0x05, 005 = 0x00
0x06, 006 = 0x00
0x07, 007 = 0x1e
0x08, 008 = 0x00
0x09, 009 = 0x40
0x0a, 010 = 0x01
0x0b, 011 = 0x01
0x0c, 012 = 0x5f
0x0d, 013 = 0x00
0x0e, 014 = 0x00
0x0f, 015 = 0x14
0x10, 016 = 0x14
0x11, 017 = 0xff
0x12, 018 = 0xff
0x13, 019 = 0x78
0x14, 020 = 0x78
0x15, 021 = 0x00
0x16, 022 = 0x78
0x17, 023 = 0x78
0x18, 024 = 0x78
0x19, 025 = 0x86
0x1a, 026 = 0x00
0x1b, 027 = 0xfe
0x1c, 028 = 0x00
0x1d, 029 = 0x00
0x1e, 030 = 0xfe
0x1f, 031 = 0x00
0x20, 032 = 0x00
0x21, 033 = 0x00
0x22, 034 = 0x00
0x23, 035 = 0x00
0x24, 036 = 0x00
0x25, 037 = 0xc0
0x26, 038 = 0x00
0x27, 039 = 0x00
0x28, 040 = 0x00
0x29, 041 = 0x00
0x2a, 042 = 0x00
0x2b, 043 = 0x00
0x2c, 044 = 0x00
0x2d, 045 = 0x00
0x2e, 046 = 0x00
0x2f, 047 = 0x80
0x30, 048 = 0x00
0x31, 049 = 0x00
0x32, 050 = 0x00
0x33, 051 = 0x0f
0x34, 052 = 0x00
0x35, 053 = 0x00
0x36, 054 = 0x00
0x37, 055 = 0x00
0x38, 056 = 0x00
0x39, 057 = 0x00
0x3a, 058 = 0x07
0x3b, 059 = 0x00
0x3c, 060 = 0x00
0x3d, 061 = 0x00
0x3e, 062 = 0x00
0x3f, 063 = 0x00
0x40, 064 = 0x80
0x41, 065 = 0x0f
0x42, 066 = 0x00
0x43, 067 = 0x00
0x44, 068 = 0x00
0x45, 069 = 0x00
0x46, 070 = 0x00
0x47, 071 = 0x00
0x48, 072 = 0x07
0x49, 073 = 0x00
0x4a, 074 = 0x00
0x4b, 075 = 0x00
0x4c, 076 = 0x00
0x4d, 077 = 0x00
0x4e, 078 = 0x00
0x4f, 079 = 0x00
0x50, 080 = 0x00
0x51, 081 = 0x00
0x52, 082 = 0x00
0x53, 083 = 0x00
0x54, 084 = 0x00
0x55, 085 = 0x00
0x56, 086 = 0x0b
0x57, 087 = 0x00
0x58, 088 = 0x00
0x59, 089 = 0x00
0x5a, 090 = 0x00
0x5b, 091 = 0x00
0x5c, 092 = 0x80
0x5d, 093 = 0x0b
0x5e, 094 = 0xde
0x5f, 095 = 0x0c
0x60, 096 = 0x00
0x61, 097 = 0x00
0x62, 098 = 0x00
0x63, 099 = 0x00
0x64, 100 = 0x00
0x65, 101 = 0x00
0x66, 102 = 0xa2
0x67, 103 = 0x00
0x68, 104 = 0x00
0x69, 105 = 0x00
0x6a, 106 = 0x00
0x6b, 107 = 0x00
0x6c, 108 = 0x00
0x6d, 109 = 0x00
0x6e, 110 = 0x00
0x6f, 111 = 0x00
0x70, 112 = 0x00
0x71, 113 = 0x00
0x72, 114 = 0x00
0x73, 115 = 0x00
0x74, 116 = 0x00
0x75, 117 = 0x00
0x76, 118 = 0x00
0x77, 119 = 0x00
0x78, 120 = 0x00
0x79, 121 = 0x00
0x7a, 122 = 0x00
0x7b, 123 = 0x00
0x7c, 124 = 0x00
0x7d, 125 = 0x00
0x7e, 126 = 0x00
0x7f, 127 = 0x00
0x80, 128 = 0x00
0x81, 129 = 0x00
0x82, 130 = 0xaa
0x83, 131 = 0x91
0x84, 132 = 0xc0
0x85, 133 = 0x00
0x86, 134 = 0x00
0x87, 135 = 0x1e
0x88, 136 = 0x00
0x89, 137 = 0x40
0x8a, 138 = 0x01
0x8b, 139 = 0x01
0x8c, 140 = 0x5f
0x8d, 141 = 0x00
0x8e, 142 = 0x00
0x8f, 143 = 0x14
0x90, 144 = 0x14
0x91, 145 = 0xff
0x92, 146 = 0xff
0x93, 147 = 0x78
0x94, 148 = 0x78
0x95, 149 = 0x00
0x96, 150 = 0x78
0x97, 151 = 0x78
0x98, 152 = 0x78
0x99, 153 = 0x86
0x9a, 154 = 0x00
0x9b, 155 = 0xfe
0x9c, 156 = 0x00
0x9d, 157 = 0x00
0x9e, 158 = 0xfe
0x9f, 159 = 0x00
0xa0, 160 = 0x00
0xa1, 161 = 0x00
0xa2, 162 = 0x00
0xa3, 163 = 0x00
0xa4, 164 = 0x00
0xa5, 165 = 0xc0
0xa6, 166 = 0x00
0xa7, 167 = 0x00
0xa8, 168 = 0x00
0xa9, 169 = 0x00
0xaa, 170 = 0x00
0xab, 171 = 0x00
0xac, 172 = 0x00
0xad, 173 = 0x00
0xae, 174 = 0x00
0xaf, 175 = 0x80
0xb0, 176 = 0x00
0xb1, 177 = 0x00
0xb2, 178 = 0x00
0xb3, 179 = 0x0f
0xb4, 180 = 0x00
0xb5, 181 = 0x00
0xb6, 182 = 0x00
0xb7, 183 = 0x00
0xb8, 184 = 0x00
0xb9, 185 = 0x00
0xba, 186 = 0x07
0xbb, 187 = 0x00
0xbc, 188 = 0x00
0xbd, 189 = 0x00
0xbe, 190 = 0x00
0xbf, 191 = 0x00
0xc0, 192 = 0x80
0xc1, 193 = 0x0f
0xc2, 194 = 0x00
0xc3, 195 = 0x00
0xc4, 196 = 0x00
0xc5, 197 = 0x00
0xc6, 198 = 0x00
0xc7, 199 = 0x00
0xc8, 200 = 0x07
0xc9, 201 = 0x00
0xca, 202 = 0x00
0xcb, 203 = 0x00
0xcc, 204 = 0x00
0xcd, 205 = 0x00
0xce, 206 = 0x00
0xcf, 207 = 0x00
0xd0, 208 = 0x00
0xd1, 209 = 0x00
0xd2, 210 = 0x00
0xd3, 211 = 0x00
0xd4, 212 = 0x00
0xd5, 213 = 0x00
0xd6, 214 = 0x0b
0xd7, 215 = 0x00
0xd8, 216 = 0x00
0xd9, 217 = 0x00
0xda, 218 = 0x00
0xdb, 219 = 0x00
0xdc, 220 = 0x80
0xdd, 221 = 0x0b
0xde, 222 = 0xde
0xdf, 223 = 0x0c
0xe0, 224 = 0x00
0xe1, 225 = 0x00
0xe2, 226 = 0x00
0xe3, 227 = 0x00
0xe4, 228 = 0x00
0xe5, 229 = 0x00
0xe6, 230 = 0xa2
0xe7, 231 = 0x00
0xe8, 232 = 0x00
0xe9, 233 = 0x00
0xea, 234 = 0x00
0xeb, 235 = 0x00
0xec, 236 = 0x00
0xed, 237 = 0x00
0xee, 238 = 0x00
0xef, 239 = 0x00
0xf0, 240 = 0x00
0xf1, 241 = 0x00
0xf2, 242 = 0x00
0xf3, 243 = 0x00
0xf4, 244 = 0x00
0xf5, 245 = 0x00
0xf6, 246 = 0x00
0xf7, 247 = 0x00
0xf8, 248 = 0x00
0xf9, 249 = 0x00
0xfa, 250 = 0x00
0xfb, 251 = 0x00
0xfc, 252 = 0x00
0xfd, 253 = 0x00
0xfe, 254 = 0x00
0xff, 255 = 0x00

Regards,

Satish

Hi Satish,

Are you performing any external loopback (DOUT -> DIN)? If you are not and just sending data to the DAC, you cannot digitally increase the volume. There are only attenuation registers. To get the full range, you will need to send a full scale signal and use the digital volume control registers to lower/mute the volume.

Besides, why would you not send a full scale input to the DAC? By not sending a full scale input, you are not utilizing the full range of the DAC. Distortion will also increase at the lower ranges and you may see quantization noise. 

Regards,

Aaron Estrada