Autodesk 64006-051108-9001 User Guide - Page 86

Channels, Speed vs. Quality (only for MP3), Options, Volume, Low Pass, QDesign Music 2.

Get Autodesk 64006-051108-9001 - Discreet Cleaner - Mac PDF manuals and user guides
UPC - 606121704713
View all Autodesk 64006-051108-9001 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 86 highlights

78 Chapter 6: Pre-processing Channels Enable to set the channels the encoded audio contains. Mono is one channel audio. It requires less space than stereo, and is frequently used for multimedia projects. Stereo has two audio channels and requires more space than mono. It generally sounds better than mono on systems that can reproduce it. Speed vs. Quality (only for MP3) Set the trade-off between speed and quality of the encoding. Options Enable, and then click Set to display options specific to the selected audio codec. Volume You can change the volume of your audio track with the Adjust slider. Numbers are percentages - greater than 100 increases the volume, less than 100 decreases the volume. Zero is silent. If you select the Normalize option instead of the Adjust option, Cleaner scans the movie before compressing to find the loudest sound and then determines the correct volume adjustment to make this sound the maximum volume. This volume adjustment is applied to the entire movie. Normalizing to 90% is often helpful for highly compressed Web audio such as QDesign Music 2. Low Pass The Low Pass filter removes all frequencies at or above the given value in kHz. Unlike other filters that are normally named for what they change, this filter is named for what it does not change. The Low Pass filter gets its name from the fact that low frequencies (below the given value) "pass" through the filter unaltered. Generally, the Low Pass filter is used to eliminate specific high frequencies, such as a very highpitched whine. To use this filter, specify the frequency (in kHz) above which you want the signal to be silent. Note: The Notch filter is often a better choice than Low Pass if you know the frequency at which the unwanted noise is occurring. The Notch filter enables you to selectively target a specific frequency without removing all the frequencies above it. If set too low, the Low Pass filter can make the audio sound muddy as it removes too many of the high (treble) frequencies from a source.

  • 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
Chapter 6: Pre-processing
78
Channels
Enable to set the channels the encoded audio contains. Mono is one channel audio. It requires
less space than stereo, and is frequently used for multimedia projects. Stereo has two audio
channels and requires more space than mono. It generally sounds better than mono on systems
that can reproduce it.
Speed vs. Quality (only for MP3)
Set the trade-off between speed and quality of the encoding.
Options
Enable, and then click Set to display options specific to the selected audio codec.
Volume
You can change the volume of your audio track with the Adjust slider. Numbers are
percentages — greater than 100 increases the volume, less than 100 decreases the volume. Zero
is silent.
If you select the Normalize option instead of the Adjust option, Cleaner scans the movie before
compressing to find the loudest sound and then determines the correct volume adjustment to
make this sound the maximum volume. This volume adjustment is applied to the entire movie.
Normalizing to 90% is often helpful for highly compressed Web audio such as
QDesign Music 2.
Low Pass
The Low Pass filter removes all frequencies at or above the given value in kHz. Unlike other
filters that are normally named for what they change, this filter is named for what it does not
change. The Low Pass filter gets its name from the fact that low frequencies (below the given
value) “pass” through the filter unaltered.
Generally, the Low Pass filter is used to eliminate specific high frequencies, such as a very high-
pitched whine. To use this filter, specify the frequency (in kHz) above which you want the
signal to be silent.
Note:
The Notch filter is often a better choice than Low Pass if you know the frequency at which
the unwanted noise is occurring. The Notch filter enables you to selectively target a specific
frequency without removing all the frequencies above it.
If set too low, the Low Pass filter can make the audio sound muddy as it removes too many of
the high (treble) frequencies from a source.