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quickthresh Reference

Fast chord detection

quickthresh

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

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
buddy
iter
join
pack
thresh