What we know about the measurement:

Dolby CS 128 is a passive cinema

  • Quality of the measurement data is medium.
  • Origin of the data is Dolby.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • -3dB (resp. -6db) point v.s. reference is at 51.5Hz (resp. 46.2Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.3dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-30.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.58 and would be 6.64 with a perfect subwoofer.
      • Details: NBD: ON 0.54, LW 0.479, SP 0.514, PIR 0.487; SM: SP0.836, PIR0.76; LFQ 2.948, LFX 43Hz
    • Tonality (Preference) Score is 5.51 with an EQ and would be 7.35 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.473, LW 0.374, SP 0.45, PIR 0.395; SM: SP0.91, PIR0.876; LFQ 2.948, LFX 38Hz
Dolby CS 128
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
5 64.0 0.88 2.88
3 181.0 2.78 -1.83
3 366.0 2.97 -1.25
3 584.0 2.03 1.18
3 1394.0 1.74 -0.24
3 2461.0 0.86 2.59
3 3216.0 2.93 -1.34
3 6489.0 0.48 -1.24
3 10020.0 0.57 -0.18
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Dolby CS 128 filters_auto_eq

AutomaticEQ

Dolby CS 128 filters_eq_full

Target v.s. EQ

Dolby CS 128
Graphic EQ 15 bands
Set preamp gain to: -1.0dB.
Type Freq Q Gain
3 25.0 2.14 0.75
3 40.0 2.14 0.75
3 63.0 2.14 0.5
3 100.0 2.14 0.0
3 160.0 2.14 0.0
3 250.0 2.14 0.25
3 400.0 2.14 0.0
3 630.0 2.14 0.25
3 1000.0 2.14 0.25
3 1600.0 2.14 0.5
3 2500.0 2.14 0.75
3 4000.0 2.14 0.25
3 6300.0 2.14 0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.75
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These EQ is designed for a 15 bands graphical EQ.

Dolby CS 128
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.5
3 31.0 4.32 0.5
3 40.0 4.32 0.5
3 50.0 4.32 0.5
3 63.0 4.32 0.25
3 80.0 4.32 0.0
3 100.0 4.32 0.0
3 125.0 4.32 0.0
3 160.0 4.32 0.0
3 200.0 4.32 -0.25
3 250.0 4.32 0.25
3 315.0 4.32 0.0
3 400.0 4.32 0.0
3 500.0 4.32 0.25
3 630.0 4.32 0.0
3 800.0 4.32 0.25
3 1000.0 4.32 0.25
3 1250.0 4.32 0.25
3 1600.0 4.32 0.25
3 2000.0 4.32 0.5
3 2500.0 4.32 0.5
3 3150.0 4.32 0.0
3 4000.0 4.32 0.25
3 5000.0 4.32 0.0
3 6300.0 4.32 0.0
3 8000.0 4.32 0.0
3 10000.0 4.32 0.0
3 12000.0 4.32 0.25
3 16000.0 4.32 0.5
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Dolby CS 128: comparison between EQs
Dolby CS 128

Comparison betweens various EQs

Dolby CS 128

Improvements made by EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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