FREQUIA® USER GUIDE
  • What is FREQUIA?
  • QuickStart Guide
    • System Requirements
    • Download
    • Installation
    • Reset Frequia
    • Create a New Data File
    • Import Audio Files
    • Start Training
  • Overview
    • Training Data Files
    • Hint Mode
    • Equalizer / Waveform Window
    • Equalizer Display
    • Equalizer Controls & Training Indicators
    • Training Start / Stop and Setup
    • Question Indicators
    • Training Buttons
    • Light & Dark Modes
    • Sweep Enable Mode
    • Performance Analytics
    • Adaptive Training Mode
  • Working with Audio
    • Importing Audio Files
    • Playing Audio Files
    • Software Audio Inputs
    • Master Section
    • Audio Settings
  • Advanced Training
    • Training Setup Page
    • Filter Selection
    • Parameter Selection
    • Frequency Resolution
    • Gain Type
    • Gain Resolution
    • Q Resolution
    • Training Mode
    • Fixed vs Variable Parameters
    • Adaptive Training
    • Sweep Enable
  • Terms & Conditions
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On this page
  • High/Low-pass Filters
  • Shelving Equalizers
  • Parametric Equalizers
  • Bandpass Filters
  • Bandstop Filters
  1. Advanced Training

Filter Selection

PreviousTraining Setup PageNextParameter Selection

Last updated 2 years ago

On this page, you select the type of filter/equalizer that you want to train on.

‘Filter’ generally refers to a cut-only device, whereas an equalizer can either boost or cut.

FREQUIA only allows you to train on one filter or equalizer at any given time. The rationale for this is that very few people can correctly identify +/- 1dB changes made to audio signals, and even fewer can consistently achieve this in mode.

High/Low-pass Filters

A High-pass Filter (HPF) passes (doesn't boost or cut) frequencies ABOVE the selected frequency, whereas a Low-pass Filter (LPF) passes frequencies BELOW the selected frequency. A high Q value may boost certain frequencies, even though there is no gain applied.

The parameters of High/Low-pass Filters that you can train to identify are Frequency and Q (these filters do not have a Gain parameter).

If you choose to train on this type of filter, FREQUIA will randomly choose between a High-pass or a Low-pass filter during training.

Shelving Equalizers

Shelving equalizers boost or cut all frequencies above or below the selected frequency. There are two types of Shelving Equalizers: Low Shelf and High Shelf. A Low Shelf boosts or cuts all frequencies BELOW the selected frequency. A High Shelf boosts or cuts all frequencies ABOVE the selected frequency.

The parameters of Shelving Equalizers that you can train to identify are Frequency, Gain, and Q.

If you choose to train on this type of equalizer, FREQUIA will randomly choose between a High-shelf or a Low-shelf during training.

Parametric Equalizers

Parametric Equalizers boost or cut frequencies symmetrically around a selected center frequency. Gain controls the amount of boost or cut, and Q controls the bandwidth of the boost or cut.

The parameters of a Parametric Equalizer that you can train to identify are Frequency, Gain, and Q.

Bandpass Filters

Bandpass Filters pass all frequencies within a certain range and cut all others. In reality, these filters cut all frequencies except those at the very center.

The parameters of a Bandpass Filter that you can train to identify are Frequency and Q (these filters do not have a Gain parameter).

Bandstop Filters

Bandstop Filters cut all frequencies within a certain range and pass all others.

The parameters of a Bandstop Filter that you can train to identify are Frequency and Q (these filters do not have a Gain parameter).

Absolute Identification
The Filter Selection Page