# Octave Filters

## Description

The filter block `Octave Filters`

filters a signal through an octave filter bank.
The octave analyser is designed based on IEC 61260-1:2014 and the
specifications in the attributes. The octave filters are class 1 which is the best filter class

##### tip

If you want to use an octave analyser go here.

#### Input

The input is a single channel `Mx1`

.

#### Output

The output is `MxN`

which is the input data filtered by N octave filters based on the specifications.

## Attributes

Attribute | Value |
---|---|

Name | OctaveFilters |

Bands pr. octave | โ 3 |

Start frequency | โ 20 Hz |

Stop frequency | โ 20.000 Hz |

Base | 10 |

Reference frequency | โ 1000 Hz |

Channels | 1 |

*Values with* โ *can receive external input.*

#### Name

Name specifies the name of the block.

#### Bands pr. octave

Bands pr. octave is the number of bands pr. octave. Maximum is 24 bands pr. octave.

#### Start frequency

Start frequency is the frequency which the lowest octave band must contain.

#### Stop frequency

Stop frequency is the frequency which the highest octave band must contain.

#### Base

Base is a design parameter which can either be `10`

or `2`

. For default standard octave filters it is `10`

.

#### Reference frequency

Reference frequency is a design parameters. For default standard octave filters it is `1000 Hz`