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quickthresh

Fast chord detection

Description

Combines numbers when they are received close together. quickthresh is a faster, low-latency alternative to thresh that is optimized for chord detection.

Examples

A comparison of quickthresh and thresh shows that quickthresh detects chords with lower, more constant, latency

Arguments

threshold [number]

Optional
Unitsms

The base threshold time in milliseconds; all notes received within this time period The default value for the base threshold is 40 ms.

fudge [number]

Optional
Unitsms

The "fudge" time in milliseconds - if any notes are played within this amount of time at the end of the base thresh time, the threshold is extended. If not provided, the default value is 10 ms.

extension [number]

Optional
Unitsms

The thresh extension time in milliseconds. This is an additional time frame added to the first argument, if necessary, in order to capture additional notes (due to sloppy playing) into the list. The default value is 20 ms.

Attributes

Common Box Attributes

annotation [symbol]

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

background [int] (default: 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] (default: 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] (default: 0)

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

patching_rect [4 floats] (default: 0. 0. 100. 0.)

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

position [2 floats]

g/s(set)

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] (default: 0)

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

presentation_rect [4 floats] (default: 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]

g/s(set)

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]

g/s(set)

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 [float]

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

textjustification [int]

Text Justification

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

bang

bang will reset quickthresh and output the notes in its buffer.

int

Arguments

input [int]
The incoming values which appear within a certain time threshold are stored and output as a list. See the argument descriptions to learn how the time thresholding works.

  (inlet1)

Arguments

threshold [int]
Sets the millisecond value for the base thresh time. All values received in the left inlet within this time period are collected into a list.

  (inlet2)

Arguments

fudge [int]
Sets the "fudge" time in milliseconds. If there are any incoming values within this amount of time at the end of the base thresh time, the threshold is extended to allow more values to be added to the list.

  (inlet3)

Arguments

extension [int]
In fourth inlet: Sets the threshold extension in milliseconds. This is an extension of the base thresh time, which is used if values arrive in the object's inlet in the "fudge" time zone.

float

Arguments

input [float]
In left inlet: The incoming values which appear within a certain time threshold are stored and output as a list. See the arguments' descriptions to learn how the time thresholding works.

  (inlet1)

Arguments

threshold [float]
In second inlet: Sets the millisecond value for the base thresh time. All values received in the left inlet within this time period are collected into a list.

  (inlet2)

Arguments

fudge [float]
In third inlet: Sets the "fudge" time in milliseconds. If there are any incoming values within this amount of time at the end of the base thresh time, the threshold is extended to allow more values to be added to the list.

  (inlet3)

Arguments

extension [float]
In fourth inlet: Sets the threshold extension in milliseconds. This is an extension of the base thresh time, which is used if values arrive in the object's inlet in the "fudge" time zone.

set

Arguments

threshold [int]
fudge [int]
extension [int]
The word set, followed by three millisecond values, can be used to set the three threshold parameter values (base thresh time, "fudge" time and thresh extension).

Output

float

When quickthresh has used up its threshold time, any incoming values that were played within the time threshold are output as a list.

See Also

Name Description
bondo Synchronize a group of messages
buddy Synchronize arriving data
iter Break a list into individual messages
join Combine items into a list
pack Create a list
thresh Combine numbers and lists when received close together