How to configure Manual EQ filter types

How to configure Manual EQ filter types

How to configure Manual EQ filter types 

Main Manual EQ Display

  • The large graph shows a real-time EQ curve from 10 Hz to 20,000 Hz (20 kHz).

  • The vertical scale displays gain from -20 dB to +20 dB.

  • Right now, the curve is flat (0 dB), meaning no EQ adjustments have been applied yet.


The Plus Button

This is your starting point.

πŸ“Œ What it does:

  • Tapping the + button allows you to add a new EQ filter.

  • Once tapped, you can choose from several filter types:

    • Parametric EQ

    • Low Shelving

    • High Shelving

    • 12 dB Highpass

    • 6 dB Highpass

Link to explanation about what each filter mode does:  https://support.litheaudio.com/portal/en/kb/articles/manual-eq-filter-modes-explained

Each filter lets you set:

  • Frequency (cutoff or centre)

  • Gain (boost or cut)

  • Q (bandwidth) β€” for parametric EQ

You can add multiple filters, each shown as a curve on this graph.

βœ… Finished Button

  • Once you’ve added and adjusted all your desired filters, tap Finished to apply and save them.

Why This Page Matters

This page is your manual tuning workspace β€” perfect for:

  • Professional installers doing precise room tuning

  • Advanced users who want custom sound profiles

  • Fixing specific acoustic issues (e.g. too much bass, harsh mids, sibilance)

It gives you full control over the sound signature, allowing for:

  • Cinematic bass boosts

  • Dialogue clarity enhancement

  • Room correction for odd reflections or modes

Setting Filter Type



What You’re Seeing 

Filter Type: Low Shelving

This filter affects frequencies below a selected cutoff point. You can either:

  • Boost low-end frequencies (bass)

  • Cut low-end frequencies to reduce muddiness or room boom

Graph Area (Top)

  • Horizontal axis: Frequency (10 Hz to 20 kHz)

  • Vertical axis: Gain in decibels (dB), from -20 dB to +20 dB

  • Flat green line: Currently no boost or cut has been applied

Once you adjust the gain, this line will bend upward (boost) or downward (cut) starting at your selected frequency.

Frequency Control Section (Bottom)

Frequency Box (e.g. 1000 Hz)

This sets the cutoff point of the low shelving filter. All frequencies below this point are affected by the gain setting.

Step Buttons:

These adjust the frequency up or down in preset increments:

ButtonWhat It Does
-1 / +1Fine tuning (1 Hz)
-10 / +10Moderate adjustment (10 Hz)
-100 / +100Coarse tuning (100 Hz)
-1000 / +1000Large shifts (1 kHz)

βœ… Press the tick button to apply your new frequency selection.

Why This Matters

Selecting the Right Frequency:

  • Setting the cutoff around 80–150 Hz: Targets deep bass (good for subwoofers or boomy rooms)

  • Setting it around 300–500 Hz: Affects mid-bass and low mids (good for warmth or clarity)

  • Setting it at 1000 Hz or higher: Influences too much of the sound range β€” usually not ideal for a low shelf

Real-World Use:

  • Boost low shelf: Makes audio warmer, fuller β€” great for movies or larger rooms lacking bass

  • Cut low shelf: Reduces rumble or mud β€” ideal for small rooms or echo-prone environments

Summary

SettingPurpose
Low ShelvingAdjusts everything below the selected frequency
Frequency ControlChooses where the filter starts to apply
+/- ButtonsHelps you fine-tune the filter point for precision


What is Gain (dB) in EQ?


Gain refers to the amount of boost or cut applied to a frequency range.
It’s measured in decibels (dB):

  • Positive Gain (+dB) = Boost β†’ Makes frequencies louder

  • Negative Gain (βˆ’dB) = Cut β†’ Makes frequencies quieter

  • 0.00 dB = Neutral β†’ No change applied

What This Screen Does

You are adjusting the gain for the Low Shelving filter.

  • Low shelving affects all frequencies below a selected cutoff (e.g. 100 Hz, 500 Hz, 1000 Hz)

  • The gain value you enter here tells the system how much to boost or reduce those lower frequencies.

βœ… Examples:

  • +4.0 dB = Boosts bass for a warmer or fuller sound

  • -6.0 dB = Reduces bass to fix muddiness or room boom

  • 0.0 dB = Flat response; no change applied

Why Gain Control Is Important

Fine-Tuning Bass Response:

  • Boost bass in larger or open rooms that sound weak or thin

  • Cut bass in small or reflective rooms that exaggerate low-end energy

Improves Sound Clarity:

  • Prevents low frequencies from overpowering dialogue or detail

  • Tailors the system to personal taste or use-case (e.g. movies vs music)

Summary

SettingFunction
Gain (dB)Adjusts how much boost or cut is applied
+ dBMakes bass louder (warmer, fuller sound)
- dBReduces bass (tighter, cleaner sound)
0.0 dBNo change (neutral baseline)