poly~
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poly~

Manage polyphony/DSP for patchers

Description

Use the poly~ to encapsulate a patcher inside an object box, to specify the patcher filename and the number of instances you want to load as arguments to the poly~ object, and to control object processing and routing in the loaded patcher instances.

Examples

The poly~ object manages multiple instances of a subpatch

Discussion

The poly~ object directs signals and events (messages) received in its inlets to in and in~ objects inside patcher instances, and handles the output of signals or events from instances of the poly~ object using the out and out~ objects.

Arguments

patcher-name [symbol]

The first argument must specify the name of a patcher to be loaded which already exists and is in the Max search path. A subpatch window is not automatically opened for editing when a patcher argument is supplied for the poly~ object.

number-of-instances [int]

Optional

The number of patcher instances corresponds to the number of available "voices" This number can be any number between 1 and 1023, and may be dynamically changed by using the voices message.

local and flag (0 or 1) [symbol]

Optional

With local set to 1, the poly~ object maintains its own scheduler that runs during its audio processing rather than using the global Max scheduler, allowing finer resolution for events generated by multiple patcher instances. The local scheduler is run immediately before processing a vector of audio, as if "Scheduler in Audio Interrupt" were on within the context of the poly~ object. Local scheduling is disabled by default - Scheduler locality is permanent for any patcher which is loaded, and cannot be changed by sending messages to the poly~ object.

'up' and up-sampling-factor [symbol]

Optional

Use the up argument followed by a number which is a power of two to upsample local DSP processing on the currently loaded patcher (e.g., up 2 specifies 88200 Hz at a sampling rate of 44100 Hz). Upsampling may be dynamically changed by using the up message.

'down' and down-sampling factor [symbol]

Optional

Use the down argument followed by a number which is a power of two to downsample local DSP processing on the currently loaded patcher (e.g., down 2 specifies 22050 Hz at a sampling rate of 44100 Hz). Downsampling may be dynamically changed by using the down message.

'args' and list-of-argument-values [symbol]

Optional

Use the argument args followed by an argument value to initialize any pound-sign arguments in the loaded patcher (e.g., args #1 ). If used, the args argument must be the last argument word used; everything which appears after the word args will be treated as an argument value.

Attributes

args [10 atoms]

When using messages to specifie arguments for a poly~ object's loaded patch, the patch must be reloaded by setting the patchername attribute for new arguments to take effect after initial load.

midimode [int] (default: 0)7.2.0

When midimode is set to '1', all MIDI messages sent to poly~ will be sent to all voices. Note that this does not apply to mpeevent messages. In order to send all mpeevent messages to all voices, use a '-1' value for the voice argument, eg: 'mpeevent 1 1 2 210 117' (an aftertouch message to all voices).

mpemode [int] (default: 0)7.2.0

When this attribute is set to '1', poly~ will perform direct voice allocation based on the voice argument of an mpeevent message.

parallel [int]

When this attribute is set to enable parallel processing, the poly~ object enables the use of multiple threads to run audio processing for all patcher instances. If disabled poly~ runs all patcher instances in the audio processing thread. The DSP chain must be restarted whenever the parallel attribute is changed. This attribute is disabled it when Max is hosted by the Live application.

Note: At this time, you cannot specify a single subpatcher on a different core. When enabled, this attribute splits up the number of voices between the number of processors available. It is primarily intended for patches that use a significant amount of CPU within multiple voices of the same poly~ object, and the multithreading overhead is primarily useful for larger signal vector sizes (at least 32 or greater). Other situations will not benefit. Using the default threadcount (which is equal to the number of physical cores) is best.

patchername [symbol]

The filename of a patcher file loaded into the poly~ object.

resampling [int]

Toggles the use of high-quality resampling filters. These filters are enabled by default.

steal [int]

Voice stealing enable causes the poly~ object sends the data from the note or midinote messages to instances that are still marked "busy"; this can result in clicks depending on how the instances handle the interruption. Voice stealing is disabled by default.

target [int]

The poly~ instance that will receive subsequent messages (other than messages specifically used by the poly~ object itself) arriving at the poly~ object's inlets - for example, The message target 2 routes messages to the second instance. If the target message specifies a value greater than the current number of instances (copies) of the loaded patcher, the message will be sent to the highest numbered instance (e.g., sending the message target 2 to a poly~ object containing only a single instance will send subsequent messages to the first instance). The message target 0 sends input to all instances, and using any negative number value with the target message will disable input to all instances.

voices [int]

Number of Voices

vs [int]

Specifies the signal vector size for the poly~ object's loaded patch. The signal vector size will be set on the next compilation of the DSP chain. The vs message does not force a recompilation of the DSP chain. vs 0 specifies no fixed vector size. The default is the current signal vector size.

zone [int] (default: 0)7.2.0

Use this attribute to set the MPE 'zone' that the poly~ will listen to. The default is '0' (ignore zones).

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

Sends a bang to the patcher loaded into the poly object. The result of the message is determined by the loaded patcher.

int

Arguments

input [int]
Performs functions which are specific to the user-designed poly~ patcher itself.

float

Arguments

input [float]
Performs functions which are specific to the user-designed poly~ patcher itself.

list

Arguments

message [list]
To send a message to a poly~ instance that starts with one of the words used to control the poly~ object itself, begin the message with the word list . For example, the message list target 2 sent to the left inlet of poly~ will output target 2 out the outlet of all in 1 objects, rather than changing the current target instance to the second patcher.

anything

Arguments

message [list]
The number of inlets and outlets for poly~ is determined by the patcher that is loaded. The inlets for the patcher loaded by a poly~ object accept both signal and event connections.

The signals are routed inside of the loaded patcher by using the in~ objects for signals or the in object for events. The number of total inlets in a poly~ object is determined by the highest number of an in~ or in object in the loaded patcher (e.g., if there is an in~ with argument 3 and an in with argument 4, the poly~ object will have four inlets. All the inlets accept signal connections even though there may not be an in~ object corresponding to each inlet.

Signal inputs are fed to all instances.

(drag)

Loads a file when dragging a patch from the Max File Browser to a poly~ object.

allnotesoff

Disables all playing notes by sending a message to each instance with a playing note consisting of the MIDI pitch most recently received via the note or midinote message followed by a zero velocity (note off message).

busymap

Arguments

message-outlet-number [int]
Reports the voice busy state for the number specified as the argument out the specified message outlet of the poly~ object.

(mouse)

Double-clicking on the poly~ opens a display window where you can view the contents of a loaded patcher.

down

Arguments

'down' and sampling-factor [int]
Use the up argument followed by a number which is a power of two to downsample local DSP processing on the currently loaded patcher (e.g., down 2 specifies 22050 Hz at a sampling rate of 44100 Hz). Downsampling may be dynamically changed by using the down message. Although both up and down are permissible messages to the poly~ object, the down message takes precedence over up .

exclude

Arguments

voice-number [int]
status [int]
Sending the word exclude , followed by a voice number and a one, prevents a poly~ instance from being sent messages via note allocation when the poly~ receives a note or midinote message. By default, all voices are enabled for note allocation. The word exclude , followed by a voice number and a zero re-enables the instance to receive messages when the poly~ receives a note or midinote message.

midievent

Arguments

MIDI-message (2 to 4 numbers) [list]
The word midievent , followed by two to four numbers, sends a MIDI event to poly~. The first three number arguments are the bytes of the MIDI message. The fourth, optional, argument is a detune parameter used for MIDI note messages. midievent messages are intended to be used with the polymidiin object.

mute

Arguments

instance [int]
on/off-flag [int]
Turns off signal processing for the specified instance of of a patcher loaded by the poly~ object and sends a bang message to the thispoly~ object for the specified instance. Sending a 0 as the second argument turns the patcher instance on. The message mute 0 1 mutes all instances, and mute 0 0 turns on signal processing for all instances of the patcher. If all are muted using a mute 0 1 message, individual instances cannot be unmuted until all are unmuted with a mute 0 0 message.

open

Arguments

instance-index [int]
The word open , followed by a number, opens the specified instance of the patcher. You can view the activity of any instance of the patcher up to the number of voices (set by the voices message or by an argument to the poly~ object). With no arguments, the open message opens the instance that is currently the target (see the target message).

note

Arguments

voice-allocated-data [list]
The word note , followed by a message, will send the data to the first in object of the first instance of the patcher that has not marked itself "busy" by sending a 1 to a thispoly~ object inside the patcher instance.

midinote

Arguments

voice [int]
note-values [list]
The midinote message is followed by two or more values. While note values are ordinarily two numbers that specify a MIDI note number and a velocity value, any numbers may be used for patches which work differently than the standard MIDI model.

If the second note value is not 0, the poly~ object routes the pitch velocity to the first available instance. If the velocity is 0 (i.e. a MIDI note-off message), the pitch velocity will be sent to the poly~ instance that generated the note. To determine which instance of the loaded patcher the midinote message will be sent to, send a 0 (non-busy) or 1 (busy) message to a thispoly~ object located in the loaded patcher.

mutemap

Arguments

outlet-number [int]
Report voice mutes out of a specified poly~ message outlet

notemessage

Arguments

ARG_NAME_0 [list]
The notemessage message is used to send messages to each active voice (i.e. an individual instances of a subpatcher loaded by the poly~ object). The message is sent directly to the poly~ object by means of in objects (When addressing a poly~ object, the first in object in the subpatcher is reserved for midinote messages). Sequentially, notemessage messages follow a note message - the first argument of that message being taken as a pitch for the ID of subsequent notemessage messages. The notemessage messages can be of arbitrary length, and may be unpacked and routed inside the subpatcher. In situations where a note-off message that involves a time duration before its completion (e.g. by the use of an adsr~ object), notemessage messages will be received for processing until the voice is turned off.

Note: The only way to turn a voice off properly when using a notemessage is to use a signal to a thispoly~ object in the subpatcher loaded by the poly~ object (if a signal is not connected to the thispoly~ object , the MIDI note-off message turns off the voice assignment immediately).

mpeevent

Arguments

ARG_NAME_0 [list]
The MPE event message is a list composed of the symbol mpeevent , followed by 6 integers which specify the Zone First Channel, Zone Index, Voice Number, Channel Number, MIDI Message Number, and Data. This message can be sent to a patch encapsulated in a poly~ object using the polymidiin object.

up

Arguments

'up' and sampling-factor [int]
Use the up argument followed by a number which is a power of two to upsample local DSP processing on the currently loaded patcher (e.g., up 2 specifies 88200 Hz at a sampling rate of 44100 Hz). Upsampling may be dynamically changed by using the up message. Although both up and down are permissible messages to the poly~ object, the down message takes precedence over up .

threadcount

Arguments

number of threads [int]
The word threadcount , followed by a number, sets the number of threads used to divide poly~ instances' audio processing. The default is the number of processor cores available in your computer. Typically, the number of threads should be set to the number of processor cores in your computer for best performance. This can also be accomplished by sending the message threadcount 0 . If a poly~ object has sixteen instances and the threadcount is 4, four of the poly~ instances will process audio in each of four threads.

wclose

Arguments

instance-index [int]
Closes the window for the numbered instance specified by the argument. If no number argument is used, wclose will close the patcher window with the highest numbered index.

Output

anything

The number of outlets of a poly~ object is determined by the sum of the highest argument numbers of the out and out~ objects in the loaded patcher. For instance, if there is an out 3 object and an out~ 2 object, the poly~ object will have five outlets. The signal outputs corresponding to the out~ objects are leftmost in the poly~ object, followed by the event outlets corresponding to the out objects.

Signals sent to the inlet of out~ objects in each patcher instance are mixed if there is more than one instance and appear at the corresponding outlets of the poly~ object.

See Also

Name Description
in Message input for a patcher loaded by poly~ or pfft~
in~ Signal input for a patcher loaded by poly~
out Message output for a patcher loaded by poly~ or pfft~
out~ Signal output for a patcher loaded by poly~
patcher Create a subpatch within a patch
thispoly~ Control poly~ voice allocation and muting
MSP MIDI Tutorial 3: MIDI Sampler MSP MIDI Tutorial 3: MIDI Sampler
MSP Polyphony Tutorial 1: Using the poly~ Object MSP Polyphony Tutorial 1: Using the poly~ Object