CFQLS/CFQLI

  • 25 mins read

The CFQLI (Clarifi and Quantum Logic Immersion) is combination of two different audio objects for purpose of optimization.

  • Clari-Fi (CF) is an algorithm that receives a stereo audio stream, analyses the content for fidelity losses related to destructive or perceptual coding, then adds an approximation of these losses back to the original signal.
  • Quantum Logic Immersion (QLI) is an up-mixing algorithm that converts the stereo or multichannel (5.1 or 7.1) input signals and up mixes it to 8 or 13 output channels (7.1 surround and 5 height channels).

CFQLI  (Clarifi and Quantum Logic Immersion) also know as CFQLS (Clarifi and Quantum Logic Surround).

Use Case: The CFQLS object can used in following ways.

  • CFQLS object can be used as standalone CF, standalone QLi or a combined CFQLS object.
  • CF needs to process raw audio signal. Hence, it must be placed before any equalization (volume, compressor etc) in the signal flow. CF works only for stereo inputs and generates a stereo output. When both CF and QLS are to be used, the stereo output of CF is used as a stereo input of QLI.

CFQLS/CFQLI Properties

Below table describes about object properties and functionality of CFQLS/CFQLI audio object.

In the default mode, CFQLS object has no control inputs. It has 2 inputs and 13 output channels. The number of input and output channels for CFQLS can be controlled at design time by selecting the appropriate object mode.

Properties Description
Display Name Display the name of the CFQLS audio object in signal flow design. It can be changed based on the intended usage of the object.
Object Mode CFQLS supports following audio objects

  • 2.0_to_7.1.5
  • 5.1_to_7.1.5
  • 7.1_to_7.1.5
  • 2.0_to_7.1
  • 5.1_to_7.1
  • 7.1_to_7.1

Mode

There are total six mode in CFQLS object.

Name Description
2.0_to_7.1.5 Supports stereo input and generates 7.1 output plus 5 height channels.
5.1_to_7.1.5 Supports stereo and 5.1 input and generates 7.1 output plus 5 height channels.
7.1_to_7.1.5 Supports stereo, 5.1 and 7.1 input and generates 7.1 output plus 5 height channels.
2.0_to_7.1 Supports stereo input and generates 7.1 output.
5.1_to_7.1 Supports stereo and 5.1 input and generates 7.1 output.
7.1_to_7.1 Supports stereo, 5.1 and 7.1 input and generates 7.1 output.

The input channel modes:

  • Stereo
  • Multichannel_5_1
  • Multichannel_7_1
  • Stereo_Ctrl
  • Multichannel_5_1_Ctrl
  • Multichannel_7_1_Ctrl

The QLS/QLI creates a 7.0.5 surround upmix from a stereo (or dual mono), 5.1, or 7.1 input audio signal using signal extraction and reverb extraction techniques.

The input channel order is:

  1. Left Front
  2. Right Front
  3. Center
  4. LFE
  5. Left Surround/Rear
  6. Right Surround/Rear
  7. Left Side
  8. Right Side
 The output channel order is:

  1. Left Front
  2. Right Front
  3. Center
  4. LFE (not used — for future use)
  5. Left Side
  6. Right Side
  7. Left Rear
  8. Right Rear
  9. Left Height (only for QLI)
  10. Right Height (only for QLI)
  11. Center Height (only for QLI)
  12. Left Rear Height (only for QLI)
  13. Right Rear Height (only for QLI)

Cross gains to x (front, center, side) are not applied on the dedicated multi-channel inputs (from input multi-channel signal), but only on the extracted channels as the result of the “Front signal extraction” feature, which needs to be enabled in the GUI. Currently, the original signals with cross gains are only applied to the front left and front right.

Memory allocation for optimized MCPS on GUL.

CFQLS algorithm uses FFT algorithm. There are six buffers used by FFT.  For FFT to work these buffers must be allocated in internal memory. There are also memory alignment requirements.
Please refer below table for memory records and alignment.

Memory record Label Alignment in bytes
FFT real Input signal critical for MCPS

4096 for Block size = 512

2048 for Block size = 256
FFT imaginary input signal critical for MCPS

4096 for Block size = 512

2048 for Block size = 256
FFT temporary buffer1-critical for MCPS 8
FFT temporary buffer2-critical for MCPS 8
FFT Twiddle real part critical for MCPS 8
FFT Twiddle imaginary part critical for MCPS 8

For better MCPS performance allocate these buffers to lower memory latency levels. MCPS can be further improved if these buffers are placed in different block of lower memory latency.

In xAF design:

  • Level1 latency is mapped to L1 memory Block 0
  • Level2 latency is mapped to L1 memory Block 1
  • Level3 latency is mapped to L1 memory Block 2

Below is example of memory allocation for improved MCPS performance.

Additional Parameters

Parameter Description Unit Range Default
Max Reverb Delay The selected value sets the upper limit for the reverb delay tuning parameters. The value is used to enable a further reduction of the required memory as the size of reverb delays are influencing the required data memory. Values below 10ms are possible for maximum optimization but may lead to reduced audio performance ms 0 – 50 50
Max Lookahead Delay The selected value sets the upper limit for super user’ lookahead delay tuning parameter. The value is used to enable a further reduction of the required memory as the size of early reflections delays are influencing the required data memory. Values below 10ms are possible for maximum optimization but may lead to reduced audio performance ms 0 – 75 75
Max Early Reflections Delay The selected value sets the upper limit for the early reflections delay tuning parameters. The value is used to enable a further reduction of the required memory as the size of early reflections delays are influencing the required data memory. ms 0 – 2 2
Enable/Disable swoosh This configuration parameter enables or disables swoosh effect.

  • 1 – swoosh enabled
  • 0 – swoosh disabled

Disabling swoosh can further reduce required memory and has a large impact on CPU load, especially peak load when switching between settings

 – 0 – 1 1
Enable/Disable control inputs Control inputs can optionally be enabled during design time.

  • Minimum is 0 (control inputs disabled)
  • Maximum is 1 (control inputs enabled)

Slightly more memory is required when control inputs are enabled

 – 0 – 1 0

Tuning Parameters

CFQLS/CFQLI can be tuned by a comprehensive GTT tuning panel. Since the CFQLS object consists of two major algorithms, the tuning parameter list contains tuning parameters for QLS and CF algorithms.

Below table describe supported tuning parameters.

No Name Description Range Default Values
0 Mode
(Deprecated)		 Allows the end-user to switch QLS between three modes of operation (QLS presets). OnStage, Audience, OFF 0
1 Multi Stereo Allows switching between stereo input and multi-channel input. Stereo, Multi Stereo
2 Bypass QLS algorithm is bypassed. With the stereo input signal, bypass will produce stereo at the outputs. ON/OFF OFF
3 Master level Controls the level of all output channels. 0 – 1 1
4 Wrap Amount Selects the amount by which signal extraction components are wrapped around the listener. 1 – 2 1.25
5 Global Verb Gain control the level of the extracted reverb components when they are added to the output channels. 0 – 2 0.90
6 Reverb Gain Front level of the reverb components mixed with front output channels. 0 – 1 0.75
7 Reverb Gain Side level of the reverb components mixed with side output channels. 0 – 1 0.95
8 Reverb Gain Rear level of the reverb components mixed with rear output channels. 0 – 1 0.75
9 Reverb Gain Front Heights level of the reverb components mixed with front high output channels. 0 -1 0.60
10 Reverb Gain Rear Heights level of the reverb components mixed with rear high output channels. 0 – 0.70
11 Reverb Delay Front individual control to adjust the delay of the extracted front reverb components. 0 – 50 ms; max depends on configuration parameter 3.4 ms
12 Reverb Delay Side individual control to adjust the delay of the extracted side reverb components. 0 – 50 ms; max depends on configuration parameter 7.9 ms
13 Reverb Delay Rear individual control to adjust the delay of the extracted rear reverb components. 0-50ms; max depends on configuration parameter 16 ms
14 Reverb Delay Front Heights individual control to adjust the delay of the extracted front high reverb components. 0-50ms; max depends on configuration parameter 6 ms
15 Reverb Delay Rear Heights individual control to adjust the delay of the extracted rear high reverb components 0-50ms; max depends on configuration parameter 7.5ms
16 Reverb Gain Center Height level of the reverb components mixed with center high output channels 0 – 1 0.4
17 Reverb Delay Center Height individual control to adjust the delay of the extracted center high reverb components 0-50ms; max depends on configuration parameter 0s
18 Front To Front control the gains of the front signal extraction streams routed to front output channels 0 – 1 1
19 Front To Center control the gains of the front signal extraction streams routed to center output channels 0 – 1 0
20 Front To Side control the gains of the front signal extraction streams routed to side output channels 0 – 1 0
21 Front To Rear control the gains of the front signal extraction streams routed to rear output channels 0 – 1 0
22 Center To Front control the gains of the center signal extraction streams routed to front output channels 0 – 1 0
23 Center To Center control the gains of the center signal extraction streams routed to center output channels 0 – 1 0.8
24 Center To Side control the gains of the center signal extraction streams routed to side output channels 0 – 1 0
25 Center To Rear control the gains of the center signal extraction streams routed to rear output channels 0 – 1 0
26 Side To Front control the gains of the side signal extraction streams routed to front output channels 0 – 1 0
27 Side To Center control the gains of the side signal extraction streams routed to center output channels 0 – 1 0
28 Side To Side control the gains of the side signal extraction streams routed to side output channels 0 – 1 1
29 Side To Rear control the gains of the side signal extraction streams routed to rear output channels 0 – 1 0
30 Rear To Front control the gains of the rear signal extraction streams routed to front output channels 0 – 1 0
31 Rear To Center control the gains of the rear signal extraction streams routed to center output channels 0 – 1 0
32 Rear To Side control the gains of the rear signal extraction streams routed to side output channels 0 – 1 0
33 Rear To Rear control the gains of the rear signal extraction streams routed to rear output channels 0 – 1 1
34 Side SE Filter adjusts the width of the spatial filter for the side channels 3 – 30 10
35 Diffusion selects the amount of diffusion applied to extracted reverb signals 0 – 1 0.65
36 Genre Detect determines the probability that the Input signal is speech based ON/OFF OFF
37 Core Bypass bypass the QLS algorithm 1 (qls is bypassed) – 0 (qls is not bypassed) OFF
38 Center SE Filter Width adjusts the width of the spatial filter for the enter channel 1 – 100 10
39 Front SE determines whether extracted signals (ON) or discrete inputs (OFF) are used for front channels (Left, Right, Center) of Xgain matrix when multichannel input mode is active 0 (Signal extraction OFF) – 1 (Signal extraction ON) OFF
40 Mask Level determines the amount of Spatial Masking 0 – 1 0.2
41 Mask enables Spatial Masking

0 – OFF

1 – ON

 OFF
42 Verb LF controls the level of the low-frequency content of the extracted Reverb signals 1-12 (below 6 is a LF cut, above 6 is a LF boost) 2
43 Verb HF controls the level of high frequency content of the extracted Reverb signals 0.01-0.1 0.05
44 Mono C2F determines the level of the Center channel stream that is sent to the Front channels 0-1 0
45 Mono C2S determines the level of the Center channel stream that is sent to the Side output channels 0-1 0
46 Mono C2R determines the level of the Center channel stream that is sent to the rear output channels 0-1 0
47 Mono Detect On determines whether the Mono detection algorithm is On or Off 0 (mono detection OFF) – 1 (mono detection ON) 0
48 M2S Rate determines the rate at which the Mono Detection algorithm transitions from the mono to stereo state 0.9 – 0.9999 0.9
49 S2M Rate determines the rate at which the Mono Detection algorithm transitions from the stereo to Mono state 0.9 – 0.9999 0.9
50 C2C Boost Adjusts the level of the Center to Center leakage when the Mono Detection algorithm is in Mono state -1 – 1 0
51 C2F Boost Adjusts the level of the Center to Front leakage when the Mono Detection algorithm is in Mono state -1 – 1 0
52 C2S Boost Adjusts the level of the Center to Side leakage when the Mono Detection algorithm is in Mono state -1 – 1 0
53 Dry Limit control the amount of reverb in the output channels 0-1 0
54 Discreteness adjusts the level of broad band signal rejection in the presence of a non-broadband signal 0-1 0.1
55 Sin SE On determines whether the Signal Extraction algorithm is On or Off for the Side Output channels when multichannel Input QLS is used 0 (Signal extraction OFF) – 1 (Signal extraction ON) OFF
56 Global Xgain control global mix of spatial slice streams into output channel groups 0 – 1 1
57 Center Focus Determines the amount of extracted signal to be mixed into the Center output 0 – 1 1
58 Side Focus Determines the amount of Side signal for multi-channel input 0 – 1 1
59 Power Sum Determines the way in which the extracted signal components are summed up to form the spatial slice. 0 – 1 1
60 LFE Gain

Controls gain of low frequency content

(Ignored when using 2 channel input)

 0 – 1 1
61 5 or 7 When param 1 is set to multi, this allows 5.1 or 7.1 input selection 5.1, 7.1 5.1
62 Bass Routing Xover Freq determines cross over frequency of the low pass filter that is used to extract the low pass signals in the bass management module of the QLS system 0 – 400 Hz 250 Hz
63 Bass Routing Gain controls the gain of the low frequency signals which are added back to the output streams in the bass routing module of QLS 0 – 2 1
64 Party Bass When on, bass is distributed equally to all outputs except height channels. ON/OFF ON
65 Mono Rvb Gain determines whether the Reverb stream from the Reverb Extraction block will be extracted given a mono input source, a mono speech input source or stereo source only

0 – No Extract

1 – Extract

2 – Vox Extract

 No Extract
66 Speech to Rvb Floor threshold above the estimated noise floor (in dB) where speech is handled 3-30 dB 12
67 Speech to Rvb Sens determines how long mono music needs to be active/present when transitioning from mono speech before it is handled as mono music 10 – 200 60
68 Lookahead Dly in msec adds delay to the output of QLS but is before the reverb gain 0 – 75 msec; max depends on configuration parameter 0
69 SpeechScore Read-only (not implemented) speech probability 0 – 1 0
70 MonoProb Read-only (not implemented) mono probability 0 – 1 0
71 LToLH_Gain level of the left input channel mixed with left high channel 0 – 1 0
72 LToLH_Dly adjust the delay of the left input component mixed with left high channel 0-2ms; max depends on configuration parameter 0
73 RToLH_Gain level of the right input channel mixed with left high channel 0 – 1 0
74 RToLH_Dly adjust the delay of the right input component mixed with left high channel 0-2 ms; max depends on configuration parameter 0
75 CToLH_Gain level of the center input channel mixed with left high channel 0 – 1 0
76 CToLH_Dly adjust the delay of the center input component mixed with left high channel 0-2 ms; max depends on configuration parameter 0
77 LSToLH_Gain level of the left side input channel mixed with left high channel 0 – 1 0
78 LSToLH_Dly adjust the delay of the left side input component mixed with left high channel 0 – 2 ms; max depends on configuration parameter 0
79 RSToLH_Gain level of the right side input channel mixed with left high channel 0 – 1 0
80 RSToLH_Dly adjust the delay of the right side input component mixed with left high channel 0 – 2 ms; max depends on configuration parameter 0
81 LRToLH_Gain level of the left rear input channel mixed with left high channel 0 – 1 0
82 LRToLH_Dly adjust the delay of the left rear input component mixed with left high channel 0 – 2 ms; max depends on configuration parameter 0
83 RRToLH_Gain level of the right rear input channel mixed with left high channel 0 – 1 0
84 RRToLH_Dly adjust the delay of the right rear input component mixed with left high channel 0 – 2 ms; max depends on configuration parameter 0
85 LToRH_Gain level of the left input channel mixed with right high channel 0 – 1 0
86 LToRH_Dly adjust the delay of the left input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
87 RToRH_Gain level of the right input channel mixed with right high channel 0 – 1 0
88 RToRH_Dly adjust the delay of the right input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
89 CToRH_Gain level of the center input channel mixed with right high channel 0 – 1 0
90 CToRH_Dly adjust the delay of the center input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
91 LSToRH_Gain level of the left side input channel mixed with right high channel 0 – 1 0
92 LSToRH_Dly adjust the delay of the left side input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
93 RSToRH_Gain level of the right side input channel mixed with right high channel 0 – 1 0
94 RSToRH_Dly adjust the delay of the right side input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
95 LRToRH_Gain level of the left rear input channel mixed with right high channel 0 – 1 0
96 LRToRH_Dly adjust the delay of the left rear input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
97 RRToRH_Gain level of the right rear input channel mixed with right high channel 0 – 1 0
98 RRToRH_Dly adjust the delay of the right rear input component mixed with right high channel 0 – 2 ms; max depends on configuration parameter 0
99 LToCH_Gain level of the left input channel mixed with center high channel 0 – 1 0
100 LToCH_Dly adjust the delay of the left input component mixed with center high channel 0 – 2 ms; max depends on configuration parameter 0
101 RToCH_Gain level of the right input channel mixed with center high channel 0 – 1 0
102 RToCH_Dly adjust the delay of the right input component mixed with center high channel 0 – 2 ms; max depends on configuration parameter 0
103 CToCH Gain level of the center input channel mixed with center high channel 0 – 1 0
104 CToCH Dly adjust the delay of the center input component mixed with center high channel 0 – 2 ms; max depends on configuration parameter 0
105 LSToCH Gain level of the left side input channel mixed with center high channel 0 – 1 0
106 LSToCH Dly adjust the delay of the left side input component mixed with center high channel 0-2 ms; max depends on configuration parameter 0
107 RSToCH Gain level of the right side input channel mixed with center high channel 0 – 1 0
108 RSToCH Dly adjust the delay of the right side input component mixed with center high channel 0 – 2 ms; max depends on configuration parameter 0
109 LRToCH Gain level of the left rear input channel mixed with center high channel 0 – 1 0
110 LRToCH Dly adjust the delay of the left rear input component mixed with center high channel 0 – 2 ms; max depends on configuration parameter 0
111 RRToCH Gain level of the right rear input channel mixed with center high channel 0 – 1 0
112 RRToCH Dly adjust the delay of the right rear input component mixed with center high channel 0 – 2 ms; max depends on configuration parameter 0
113 LToLRH Gain level of the left front input channel mixed with left rear high channel 0 – 1 0
114 LToLRH Dly adjust the delay of the left input component mixed with left rear high channel 0 – 2 ms; max depends on configuration parameter 0
115 RToLRH Gain level of the right front input channel mixed with left rear high channel 0 – 1 0
116 RToLRH Dly adjust the delay of the right input component mixed with left rear channel 0 – 2 ms; max depends on configuration parameter 0
117 CToLRH Gain level of the left center input channel mixed with left rear high channel 0 – 1 0
118 CToLRH Dly adjust the delay of the center input component mixed with left rear high channel 0 – 2 ms; max depends on configuration parameter 0
119 LSToLRH Gain level of the left side input channel mixed with left rear high channel 0 – 1 0
120 LSToLRH Dly adjust the delay of the left side input component mixed with left rear high channel 0 – 2 ms; max depends on configuration parameter 0
121 RSToLRH Gain level of the right side input channel mixed with left rear high channel 0 – 1 0
122 RSToLRH Dly adjust the delay of the right side input component mixed with left rear high channel 0 – 2 ms; max depends on configuration parameter 0
123 LRToLRH Gain level of the left rear input channel mixed with left rear high channel 0 – 1 0
124 LRToLRH Dly adjust the delay of the left rear input component mixed with left rear high channel 0 – 2 ms; max depends on configuration parameter 0
125 RRToLRH Gain level of the right rear input channel mixed with left rear high channel 0 – 1 0
126 RRToLRH Dly adjust the delay of the right rear input component mixed with left rear high channel 0 – 2 ms; max depends on configuration parameter 0
127 LToRRH Gain level of the left front input channel mixed with right rear high channel 0 – 1 0
128 LToRRH Dly adjust the delay of the left input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
129 RToRRH Gain level of the right front input channel mixed with right rear high channel 0 – 1 0
130 RToRRH Dly adjust the delay of the right input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
131 CToRRH Gain level of the center input channel mixed with right rear high channel 0 – 1 0
132 CToRRH Dly adjust the delay of the center input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
133 LSToRRH Gain level of the left side input channel mixed with right rear high channel 0 – 1 0
134 LSToRRH Dly adjust the delay of the left side input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
135 RSToRRH Gain level of the right side input channel mixed with right rear high channel 0 – 1 0
136 RSToRRH Dly adjust the delay of the right side input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
137 LRToRRH Gain level of the left rear input channel mixed with right rear high channel 0 – 1 0
138 LRToRRH Dly adjust the delay of the left rear input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
139 RRToRRH Gain level of the right rear input channel mixed with right rear high channel 0 – 1 0
140 RRToRRH Dly adjust the delay of the right rear input component mixed with right rear high channel 0 – 2 ms; max depends on configuration parameter 0
141 Front height Filter0 db adjust the gain for front height filter -20 to 0 db 0 db
142 Front height Filter0 freq Adjust the frequency for front height filter 1000 – 20000 Hz 4000 Hz
143 Center height Filter0 db adjust the gain for center height filter -20 to 0 db 0 db
144 Center height Filter0 freq Adjust the frequency for center height filter 1000 – 20000 Hz 4000 Hz
145 Rear height Filter0 db adjust the gain for rear height filter -20 to 0 db 0 db
146 Rear height Filter0 freq Adjust the frequency for rear height filter 1000 – 20000 Hz 4000 Hz
CLARIFI- PARAMETERS
147 Mono Sens Used to turn on or off the mono signal sensing capability 0.1 – 20 1
148 Source bit Rate Overall level of treatment being applied to the input. 0 – 1 1
149 Vocal Air Isolates the lead instruments or vocals in signal and sharpens the frequency response, applied at bitrate 100% 0 – 4 0.8
150 Vocal Air0 Value of vocal air when bitrate is 0% 0 – 4 0
151 Vocal Air50 Value of vocal air when bitrate is at midpt % 0 – 4 0.4
152 Vocal Air_K Knee point control to set the value of bitrate at which Mid is applied 0 – 0.999 0.5
153 Vocal Air Limit Controls the low frequency limit in Hz of the VocalAir parameter 100 – 4000 350Hz
154 ASW Decorrelates or spreads the soundfield outward by adding crosstalk signals, preserving the center portion of the stage. This compensates for the overcorrelation of the stereo field typically applied by lossy codecs., applied at bitrate 100% 0 – 4 0.6
155 ASW0 Value of ASW when bitrate is 0% 0 – 4 0
156 Direct Signal Gain Controls the level of direct raw signal being added to the CF treated signal 0 – 1 1
157 Octave Full BW Ext Gain Adds high frequency bandwidth extension to compressed signal to compensate for the brickwall filter roll off due to compression codecs. 0 – 2 0.650
158 Octave Full BW Ext Gain0 Value of BWE gain when bitrate is 0 %. 0 – 2 0
159 Octave Full BW Ext Gain50 Value of BWE gain when bitrate is midpt%. 0 – 2 0.325
160 Octave Full BW Ext Gain_K Knee point control to set the value of bitrate at which Mid is applied 0 – 0.999 0.5
161 Hard Pan Boost Gain Controls the amount of boost given to extreme hard-panned signals to compensate for spatial smearing and collapse toward the center; bitrate 100 %. 0 – 4 0.8
162 Hard Pan Boost Gain0 Hard pan boost min, applied at bitrate 0 %. 0 – 4 0
163 Verb Fill Gain Restores the dropouts in reverberation by isolating reverb in lossy signal and adding natural reverb tail; operates at bitrate 100 %. 0 – 1 1
164 Verb Fill Gain0 Restores the dropouts in reverberation by isolating reverb in lossy signal and adding natural reverb tail; operates at bitrate 0 %. 0 – 1 0
165 Drum Fill Gain Controls the gain of the enhancement which sharpens the attack and decay of transient signals such as percussion and restores their original peaky quality. This control sets the overall effect of the TransBoost and BassOverallBoost controls. 0 – 1 0.676
166 Drum Fill Gain0 Value of drum fill gain when bitrate is 0 %. 0 – 1 0
167 Drum Fill Gain50 Value of drum fill gain when bitrate is midpt %. 0 – 1 0.338
168 Drum Fill Gain_K Knee point control to set the value of bitrate at which Mid is applied. 0 – 0.999 0.5
169 Mask Spread Restores the missing spectral components by filling holes in the frequency domain. 0 – 1 0.880
170 Mask Spread0 Value of mask spread when bitrate is 0 %. 0 – 1 0
171 Mask Spread50 Value of mask spread when bitrate is midpt %. 0 – 1 0.440
172 Mask Spread_K Knee point control to set the value of bitrate at which Mid is applied. 0 – 0.999 0.5
173 Scale Gain Controls the overall output level of CF, this is to allow CF output to be matched to the level in the bypassed state. 0 – 1 0.6
174 SD_Bypass Bypass the signal doctor (CF) processing algorithm. 0&1, 0 –SD is not bypass, 1- SD bypass 1
175 SD_Mode Sets whether CF automatically attempts to identify how lossy or compressed the input file is (Auto-Detect mode) or whether it applies a fixed amount of treatment (Fixed mode).

0, 1

0 = Fixed mode

1= Autodetect mode

 1
176 Intensity Functions identically to Bitrate except that it is not regulated internally when Mode is set to Auto-Detect. 0 – 1 1
177 Softness Controls the character or timbre of the high frequencies, allowing harshness to be moderated. 0 – 1 0
178 Softness0 Softness minimum value, at bitrate 0% 0 – 1 0
179 Softness50 Softness value when birate is midpt% 0 – 1 0
180 Softness_K Knee point control to set the value of bitrate at which Mid is applied 0 – 0.999 0.5
181 Trans Boost Controls the amount of transient bass boost, usually governed by the value of Drumfill 0-6 1.50
182 Trans Boost0 Transboost min value, at bitrate 0% 0-6 0
183 Bass Overall Boost Controls the amount of overall bass boost 0-2 1.20
184 Bass Overall Boost0 Overall bass boost for bitrate 0% 0-2 0
185 SD Limiter Controls the soft clip peak limiter in CF 0-1 0
186 Source Type Determine the type of audio input signal source to adjust the CF internal parameters 0-1 0
187 Gap Thresh Sets the threshold for detecting gaps (Mute) in the audio signal to reset treatment to zero and use Auto-Detect to look for signs of compression 0.1-10 2.0
188 SD SNR Sets the ratio of instantaneous detected noise to signal in the high frequency gap of a compressed audio stream such that the auto-detect algorithm will flag the stream as compressed. 0.01-1 0.15
189 Level Diff Sets the height of the brick wall needed to trigger the auto-detect algorithm. If the system is failing to detect compression (true negative), try lowering this value. If it is falsely tagging linear streams as compressed (false positive) try raising this value. 1-30 10
190 Verb BWE Amount higher frequencies added to the reverb during bandwidth extension 0-1 1
191 Verb BWE0 Amount of verb BWE when bitrate is 0% 0-1 0
192 Dirac Enables bandwidth extension treatment, in the form of a Dirac pulse, to be applied to transients, at bitrate 100% 0 – 1.08 1.02
193 Dirac0 Enables bandwidth extension treatment, in the form of a Dirac pulse, to be applied to transients; at bitrate 0% 0 – 1.08 0
194 Force Bin X Sets the operating frequency for normal bandwidth extension treatment when Manual_BinX is set. If Manual_BinX is not set, this parameter has no effect. 4000-19000 Hz 10000 Hz
195 Manual Bin X Overrides the analyzed value of the high cutoff frequency and substitutes the frequency set by Force_BinX in its place. This affects only the VerbBWE and Dirac parameters. 0-1 0
196 SBRR_X When codecs employing SBR such as HE-AAC are detected, there is no applicable cutoff frequency to determine corresponding treatment level. Therefore, this parameter imposes an equivalent treatment based on the same cutoff frequency as its value. 8000 – 20000 Hz 15000 Hz
197 SBR Smoothing Sets the amount of time-averaged smoothing on SBR detection. 0.9-0.9999 0.9970
198 SBR Sens Sets the sensitivity of the auto-detection algorithm to the presence of SBR detected elements. 0.2-2 1
199 BWE Limit Controls the frequency limit to apply bandwidth extension 8000-20000Hz 12000Hz
200 Speech Rx Sets the maximum multiplier to the Bitrate value (regardless of whether Bitrate is being regulated by Auto-Detect mode) when speech is detected. 0-1 1
201 Speech Mode Sets whether speech is always assumed (fixed mode) or detected automatically (auto-detect). 0-1; 0=fixed, 1= Autodetect Autodetect
202 BW Sensitivity Controls the sensitivity of treatment level (Bitrate) versus detected high cutoff frequency of compressed streams when in Auto-Detect mode. Lower values correspond to higher resulting Bitrate values. 0-1 0.2303
203 Decorr Mix Applies decorrelation to the right input channel to a degree set by this parameter, if/when mono probability exceeds the value set by the MonoThreshold parameter. If MonoThreshold is set to 0, then Widening will always be applied. 0-1 0.77
204 Decorr Mix0 Value of decorr mix when bitrate is 0% 0-1 0
205 Mono Threshold Sets the threshold of probability that the input is mono above which Widening is applied. 0-1 0

Control Parameters

CFQLS has 21 control inputs when the control mode is selected in GTT. The order of Control inputs for CFQLS.

Channel Description Range
1 Front to Front Crossgain (Xgain_F2F) 0 to 1
2 Front to Center Crossgain (Xgain_F2C) 0 to 1
3 Front to Side Crossgain (Xgain_F2S) 0 to 1
4 Front to Rear Crossgain (Xgain_F2R) 0 to 1
5 Center to Front Crossgain (Xgain_C2F) 0 to 1
6 Center to Center Crossgain (Xgain_C2C) 0 to 1
7 Center to Side Crossgain (Xgain_C2S) 0 to 1
8 Center to Rear Crossgain (Xgain_C2R) 0 to 1
9 Side to Front Crossgain (Xgain_S2F) 0 to 1
10 Side to Center Crossgain (Xgain_S2C) 0 to 1
11 Side to Side Crossgain (Xgain_S2S) 0 to 1
12 Side to Rear Crossgain (Xgain_S2R) 0 to 1
13 Rear to Front Crossgain (Xgain_R2F) 0 to 1
14 Rear to Center Crossgain (Xgain_R2C) 0 to 1
15 Rear to Side Crossgain (Xgain_R2S) 0 to 1
16 Rear to Rear Crossgain (Xgain_R2R) 0 to 1
17 Wrap Control 1 to 2
18 Global Reverb Gain Control 0 to 2
19 Front Reverb Gain 0 to 2
20 Side Reverb Gain 0 to 2
21 Rear Reverb Gain 0 to 2

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