norns

• Index

Contents

• Functions

Modules

• arc
• audio
• clock
• controlspec
• crow
• core.crow.public
• core.crow.quote
• encoders
• engine
• gamepad
• grid
• hid
• keyboard
• metro
• midi
• norns
• osc
• params.binary
• params.control
• params.file
• params.group
• params.number
• params.option
• params.separator
• params.taper
• params.text
• params.trigger
• paramset
• poll
• screen
• script
• softcut
• lib.beatclock
• lib.container.defaulttable
• lib.container.deque
• lib.container.observable
• lib.container.watchtable
• lib.container.weaktable
• lib.elca
• lib.envgraph
• lib.er
• lib.fileselect
• lib.filtergraph
• lib.filters
• lib.formatters
• lib.graph
• lib.intonation
• lib.lattice
• lib.lfo
• lib.listselect
• lib.musicutil
• lib.pattern_time
• lib.reflection
• lib.sequins
• lib.tabutil
• lib.test.luaunit
• lib.textentry
• lib.textentry_kbd
• lib.timeline
• lib.ui
• lib.util
• lib.voice

Module lib.filtergraph

Filter graph drawing module.

Subclass of Graph for drawing common filter graphs. Can draw approximations of low-pass, band-pass, notch and high-pass filters.

Info:

• Release: v1.0.0
• Author: Mark Eats

Functions

new (x_min, x_max, y_min, y_max, filter_type, slope, freq, resonance)	Create a new FilterGraph object.
edit (filter_type, slope, freq, resonance)	Edit a FilterGraph object.
filter_type ()	Get filter type string.
get_slope ()	Get slope value.
get_freq ()	Get frequency value.
get_resonance ()	Get resonance value.

Functions

new (x_min, x_max, y_min, y_max, filter_type, slope, freq, resonance)

Create a new FilterGraph object. All arguments optional.

Parameters:

• x_min number Minimum frequency value in Hz for x axis, defaults to 20.
• x_max number Maximum frequency value in Hz for x axis, defaults to 24000.
• y_min number Minimum amplitude value in dB for y axis, defaults to -60.
• y_max number Maximum amplitude value in dB for y axis, defaults to 30.
• filter_type string Type of filter, accepts "lowpass", "bandpass", "notch" or "highpass", defaults to "lowpass".
• slope number Slope value in decibels per octave, defaults to 12.
• freq number Frequency value in Hz, defaults to 2000.
• resonance number Resonance value 0-1, defaults to 0.

Returns:

FilterGraph Instance of FilterGraph.

edit (filter_type, slope, freq, resonance)

Edit a FilterGraph object. All arguments optional.

Parameters:

• filter_type string Type of filter, accepts "lowpass", "bandpass", "notch" or "highpass", defaults to "lowpass".
• slope number Slope value in decibels per octave, defaults to 12.
• freq number Frequency value in Hz, defaults to 2000.
• resonance number Resonance value 0-1, defaults to 0.

filter_type ()

Get filter type string.

Returns:

string Filter type string.

get_slope ()

Get slope value.

Returns:

number Slope value.

get_freq ()

Get frequency value.

Returns:

number Frequency value.

get_resonance ()

Get resonance value.

Returns:

number Resonance value.