# Unit DDspFilter

Description | uses | Classes, Interfaces, Objects and Records | Functions and Procedures | Types | Constants | Variables

## Description

## Overview

### Classes, Interfaces, Objects and Records

Name | Description
--- | ---
Class `TFilter` |
Class `TIIRFilter` |
Class `TBiquadIIRFilter` |
Class `TSimpleGainFilter` |
Class `TSimplePeakFilter` |
Class `TSimpleLowShelfFilter` |
Class `TSimpleHighShelfFilter` |
Class `TSimpleHighcutFilter` |
Class `TSimpleLowcutFilter` |
Class `TSimpleLowpassFilter` |
Class `TSimpleHighpassFilter` |
Class `TSimpleBandpass` |
Class `TSimpleNotch` |
Class `TDspLowpassFilter` |

### Types

`TPNType = array[0..1] of TComplexSingle;`

## Description

### Types

`TPNType = array[0..1] of TComplexSingle;`
-$DEFINE Debug

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