Package MSP

buffir~

buffer-based FIR filter

Description

Use buffir~ object when you need a finite impulse response (FIR) filter that convolves an input signal with samples from an input buffer.

Arguments

buffer-name[symbol]
optional

The name of a buffer~ object which buffir~ uses to filter the input signal.

read-offset[int or float]samples
optional

The offset, in samples, into the buffer~ object before buffir~ begins reading samples to construct the filter. The default is 0.

read-duration[int or float]samples
optional

The size, in samples, of the slice in the buffer~ which buffir~ will use for the filter. The default is 0, and the maximum is 4096.

Attributes

Common Box Attributes

Below is a list of attributes shared by all objects. If you want to change one of these attributes for an object based on the object box, you need to place the word sendbox in front of the attribute name, or use the object's Inspector.

annotation[symbol]

Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.

background[int]: 0

Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.

color[4 floats]

Sets the color for the object box outline.

fontface[int]

Sets the type style used by the object. The options are:

plain
bold
italic
bold italic Possible values:

0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'

fontname[symbol]

Sets the object's font.

fontsize[float]

Sets the object's font size (in points). Possible values:

'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'

hidden[int]: 0

Toggles whether an object is hidden when the patcher is locked.

hint[symbol]

Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.

ignoreclick[int]: 0

Toggles whether an object ignores mouse clicks in a locked patcher.

jspainterfile[symbol]

You can override the default appearance of a user interface object by assigning a JavaScript file with code for painting the object. The file must be in the search path.

patching_rect[4 floats]: 0. 0. 100. 0.

Sets the position and size of the object in the patcher window.

position[2 floats]
write-only

Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.

presentation[int]: 0

Sets whether an object belongs to the patcher's presentation.

presentation_rect[4 floats]: 0. 0. 0. 0.

Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.

rect[4 floats]
write-only

Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).

size[2 floats]
write-only

Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.

textcolor[4 floats]

Sets the color for the object's text in RGBA format.

textjustification[int]

Sets the justification for the object's text. Possible values:

0 = 'left'
1 = 'center'
2 = 'right'

varname[symbol]

Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.

Messages

int

In middle inlet: The offset into the filter buffer~ from which buffir~ begins to read, in samples.

In right inlet: The size (in samples) of the slice from the buffer~ which is used to filter the input signal (the maximum is 4096).

Arguments:
  • read-offset [int]

float

In middle inlet: The offset into the filter buffer~ from which buffir~ begins to read, in samples.

In right inlet: The size (in samples) of the slice from the buffer~ which is used to filter the input signal (the maximum is 4096).

Arguments:
  • read-offset [float]

clear

The word clear erases (zeroes) the current input history for the filter.

(mouse)

Double-clicking on buffir~ opens a display window where you can view the contents of the buffir~ object.

set

The word set , followed by the name of a buffer~ object, an int which specifies sample offset, and an optional int which specifies a number of samples, specifies the name of a buffer~ object which buffir~ uses to filter its input signal.

Arguments:
  • buffer-name [symbol]
  • read-offset [int]
  • read-duration [int]

signal

In left inlet: The signal to be convolved with samples from the buffer~.

In middle inlet: The offset (in samples) into the filter buffer~ from which the buffir~ object begins to read.

In right inlet: The size of the slice from the filter buffer~ which is used to filter the input signal, in samples. The maximum is 4096.

Output

signal

The filtered signal, based on a convolution of the input signal with samples in the buffer~.

See Also

Name Description
biquad~ Two-pole, two-zero filter
buffer~ Store audio samples
cascade~ Cascaded series of biquad filters