Hypex Filter Design v4.4 Pagina 1 van 29

Hypex Filter Design

Contents General info ............................................................................................................................................. 3

Options .................................................................................................................................................... 3

General functions ................................................................................................................................ 3

Volume control .................................................................................................................................... 3

Mute .................................................................................................................................................... 3

Channel assignment ............................................................................................................................ 4

Subout Control .................................................................................................................................... 4

Load measurements for speaker ......................................................................................................... 4

View sum of filters ............................................................................................................................... 4

Delay .................................................................................................................................................... 4

Biquad filters ....................................................................................................................................... 4

Input gain adapt (only AS2.100/DLCP) ................................................................................................ 4

Getting started ........................................................................................................................................ 5

Master ................................................................................................................................................. 5

Slave .................................................................................................................................................... 5

Final setup ........................................................................................................................................... 5

Ready! .................................................................................................................................................. 6

Main screen ............................................................................................................................................. 7

Device info ........................................................................................................................................... 7

Supported modules ......................................................................................................................... 7

Firmware update ................................................................................................................................. 7

Quick settings ...................................................................................................................................... 8

Filter design ............................................................................................................................................. 9

Menu bar ............................................................................................................................................. 9

File-menu ......................................................................................................................................... 9

Tools menu .................................................................................................................................... 10

Load filter to DSP menu ................................................................................................................. 10

PRESET menu ................................................................................................................................. 11

Advanced filterdesign screen ............................................................................................................ 11

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Channel submenu .......................................................................................................................... 11

Biquad sub-menu .......................................................................................................................... 12

Graphical filterdesign screen ............................................................................................................. 13

Designing Filters ............................................................................................................................ 13

Biquad filter types ......................................................................................................................... 13

Graph header ................................................................................................................................. 15

Graph left pane .............................................................................................................................. 15

Graph right pane (filter graph) ...................................................................................................... 15

Graph bottom pane ....................................................................................................................... 15

Filterobjects ................................................................................................................................... 16

Adding a filterobject ...................................................................................................................... 17

Disable or delete filterobjects ....................................................................................................... 18

Impulse response graph ................................................................................................................ 19

Step response graph ...................................................................................................................... 20

Filter design examples ....................................................................................................................... 20

Butterworth ................................................................................................................................... 20

Bessel filter .................................................................................................................................... 23

Recording ........................................................................................................................................... 25

FAQ ........................................................................................................................................................ 26

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General info

Options

General functions

Volume control

Mute

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Channel assignment

Subout Control

Load measurements for speaker

View sum of filters

Delay

Biquad filters

Input gain adapt (only AS2.100/DLCP)

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Getting started

Master

Slave

Final setup

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Ready!

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Main screen

Picture 1: Main screen

Device info

Supported modules

Firmware update

Picture 2: Firmware version of attached device

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Quick settings

Picture 3: Device is muted

Picture 4: Selecting a preset

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Filter design

Menu bar

File-menu

Picture 5: File menu

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Tools menu

Picture 6: Tools menu

Picture 7: Set Asio preferences

Load filter to DSP menu

Picture 8: Load filter to DSP menu

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PRESET menu

Picture 9: Preset menu

Advanced filterdesign screen

Picture 10: Advanced screen overview

Channel submenu

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Picture 11: Right click on the channel box

Biquad sub-menu

Picture 12: Right click on one of two selected biquads

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Graphical filterdesign screen

Picture 13: Graphical filterdesign screen

Designing Filters

Biquad filter types

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Table 1: Biquad filter types

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Graph header

Graph left pane

Graph right pane (filter graph)

Graph bottom pane

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Filterobjects

Picture 14: Filtergraph

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Adding a filterobject

Picture 15: Select a channel in the graphic screen

Picture 16: Add a filterobject

Picture 17: Select the filterobject function

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Picture 18: Filterobject curve

Disable or delete filterobjects

Picture 19: Disable or delete a filterobject

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Impulse response graph

Picture 20: Impulseresponse graph

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Step response graph

Picture 21: Stepresponse graph

Filter design examples

Butterworth

Order Q first biquad Q second biquad Q third biquad

2 0.71

3 1st order filter, no Q 1.0

4 0.54 1.31

5 1st order filter, no Q 0.62 1.62

6 0.52 0.71 1.93 Table 2: Butterworth coefficients

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Third order lowpass Butterworth example (Fc=1000Hz)

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Fourth order lowpass Butterworth example (Fc=1000Hz)

+

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Fifth order lowpass Butterworth example (Fc=1000Hz)

+ +

Sixth order lowpass Butterworth example (Fc=1000Hz)

+ +

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Bessel filter

Order Q first biquad First frequency factor

Q second biquad

Second frequency factor

Q third biquad

Third frequency factor

2 0.58 1.27x

3 1st order filter, no Q

1.32x 0.69 1.45x

4 0.81 1.60x 0.52 1.43x

5 1st order filter, no Q

1.50x 0.92 1.76x 0.56 1.56x

6 1.02 1.90x 0.61 1.69x 0.51 1.60x Table 3: Besselfilter coefficients

Biquad Cutoff frequency Q-factor

1 1.6x1000=1600Hz 0.81

2 1.43x1000=1430Hz 0.52 Table 4: Example 4th order Bessel filter Fc=1000Hz

Biquad Cutoff frequency Q-factor

1 1.9x1000=1900Hz 1.02

2 1.69x1000=1690Hz 0.61

3 1.6x1000=1600Hz 0.51 Table 5: Example 6th order Bessel filter Fc=1000Hz

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Fourth order lowpass Bessel example (Fc=1000Hz)

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Sixth order lowpass Bessel example (Fc=1000Hz)

+ +

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Recording

Picture 22: Enable recording button

Picture 23: Change sweep output gain

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FAQ

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