C
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Chapter 3: Sonoma Mixer
97
Table 3-5
Meters
Band Range
/dB SACD
Over level
/dB SACD
Description
DC
–60
→
–40 –50
The recommended maximum level for a DSD signal that will be put onto
SACD is -50dB SACD. This band is recommended, not mandatory.
LF
–4
→
+4
0
Peak audio level after 20 kHz Butterworth 60dB/oct low pass filter and DC
removal filter. This band relates to a recommended maximum level in a
previous version of the
Scarlet Book
and can be ignored.
Max
Peak
–18
→
+6
>+3.08
>24 same value DSD samples out of every rolling 28 samples gives an
'over'. This band corresponds to
Scarlet Book Part 2
Annex D.3 'Maximum
SACD Audio Peak Level'. This is a mandatory specification. Any master
sent to a disc replicator with overs in this band will be rejected.
HF
–30
→
–10 –20
RMS level measured after 40 kHz Butterworth 30 dB/oct high pass filter
and 100 kHz Butterworth 30dB/oct low pass filter. This band relates to
Scarlet Book Part 2
Annex D.4 'High Frequency DSD Noise
Level'. This is a mandatory specification. Any master sent to a disc
replicator with overs in this band will be rejected.
Table 3-6
Mixer Master Controls
Item
Specifications
Oscillator control
Signal: Triangular wave
Level: [–40 dB SACD
→
+0 dB SACD], Normalized 0 dB
Frequency: [20 Hz
→
20 kHz], Normalized 1 kHz
Snapshot
SAVE, LOAD and DEFAULT switches
Snapshot files suffixed with .
snp
.
Complete state of mixer is stored.
Snapshot files not compatible across versions of mixer.
Previous shutdown state of mixer is loaded on startup.
Program insert
In/Out switch
Surround/Stereo Switch
Puts channel bus send and master controls into either mode
Link/Unlink/Copy Switches Controls control linking and copying. Controls groups have independent
linking. See
Section 3.6.10, Linking and Copying Channel Faders and
Controls
.
Reorder Switches
Controls ordering of channel processing sections. See
Section 3.6.7, Channel
Strip Ordering
.
Fader Mode Switch
Channel faders control Program, AUX Send, or short channel contribution.
LFE Filter
LPF for surround LFE output channel
Always in
Frequency: [20 Hz
→
500 Hz], Normalized 20 Hz
Slope: [0 dB/oct
→
–36 dB/oct], Normalized 0 dB/oct
EQ
HMF, MF, LMF EQ
Different settings for surround and stereo modes
LMF switchable between parametric and shelf mode
Individual in/out switches