Autodesk 64006-051108-9001 User Guide - Page 103

MP3, Creating MP3 Files, Choosing Encoding Parameters

Page 103 highlights

MP3 95 MP3 MP3 is a highly compressed audio format that is very popular on the Internet for the distribution of music. MP3 is part of the MPEG family of compression standards. Technically, MP3 stands for MPEG Audio Layer 3, not MPEG-3 (there's no such thing as MPEG-3). MP3 enables you to store digital audio in much smaller files while still preserving the quality of the original file. MP3 is normally used for audio-only files, but it can be combined with video. MP3 files are most commonly stored at between 128 and 256 kbits/sec (approximately 16 to 32 KBytes/sec), with a sampling rate of 44.1 kHz, sample depth of 16 bits, and in stereo. These settings provide approximately 11:1 compression, which means that a CD-ROM could hold more than 11 hours of MP3 music. Cleaner comes with a professional MP3 encoder created by Fraunhofer IIS. Compared to consumer encoders typically found in "jukebox" and "CD ripper" utilities, the Cleaner MP3 encoder often sounds substantially better. At 256 kbits/sec, Cleaner encoding is considered archival-quality, but at only 1/5 of the size of the original. There is a wide range of players available, both software and hardware. There is also a huge number of MP3 files available online through Websites. Creating MP3 Files Use Cleaner with MP3 in the same fashion as you use Cleaner with other audio-only formats, such as AIFF or WAV. To create an MP3: 1. Drag the source file to the Batch window. See "Importing from Audio CDs" on page 21. 2. Double-click the Settings column of the project to open the Settings dialog. 3. Select an MP3 setting from the list of settings on the left side of the dialog or create your own setting by clicking the New button. 4. Click the Apply button to assign the setting to the project and return to the Batch window. 5. Click the Start button to begin processing. Choosing Encoding Parameters When creating MP3 files with Cleaner, you can control a number of parameters. Using the default settings generally produces good results, but you may wish to change certain parameters to adjust the size and quality of the output files.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292

MP3
95
MP3
MP3 is a highly compressed audio format that is very popular on the Internet for the
distribution of music. MP3 is part of the MPEG family of compression standards. Technically,
MP3 stands for MPEG Audio Layer 3, not MPEG-3 (there’s no such thing as MPEG-3). MP3
enables you to store digital audio in much smaller files while still preserving the quality of the
original file. MP3 is normally used for audio-only files, but it can be combined with video.
MP3 files are most commonly stored at between 128 and 256 kbits/sec (approximately 16 to 32
KBytes/sec), with a sampling rate of 44.1 kHz, sample depth of 16 bits, and in stereo. These
settings provide approximately 11:1 compression, which means that a CD-ROM could hold
more than 11 hours of MP3 music.
Cleaner comes with a professional MP3 encoder created by Fraunhofer IIS. Compared to
consumer encoders typically found in “jukebox” and “CD ripper” utilities, the Cleaner MP3
encoder often sounds substantially better. At 256 kbits/sec, Cleaner encoding is considered
archival-quality, but at only 1/5 of the size of the original.
There is a wide range of players available, both software and hardware. There is also a huge
number of MP3 files available online through Websites.
Creating MP3 Files
Use Cleaner with MP3 in the same fashion as you use Cleaner with other audio-only formats,
such as AIFF or WAV.
To create an MP3:
1.
Drag the source file to the Batch window. See “Importing from Audio CDs” on page 21.
2.
Double-click the Settings column of the project to open the Settings dialog.
3.
Select an MP3 setting from the list of settings on the left side of the dialog or create your own
setting by clicking the New button.
4.
Click the Apply button to assign the setting to the project and return to the Batch window.
5.
Click the Start button to begin processing.
Choosing Encoding Parameters
When creating MP3 files with Cleaner, you can control a number of parameters. Using the
default settings generally produces good results, but you may wish to change certain
parameters to adjust the size and quality of the output files.