mc.abs~

Description

Use the abs~ object to take any given signal and output only the absolute (non-negative) translation of that signal (i.e. a rectified waveform). All negative values in the input signal are converted to positive values in the output.

Arguments

None.

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.

jspainterfile [symbol]

JS Painter File

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 [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.

Multichannel Group Attributes

chans [int]

The chans attribute sets the number of channels and instances in the MC wrapper object. To define a fixed number of channels regardless of what is connected to the object, set chans via a typed-in argument, for example typing mc.cycle~ @chans 100 would create 100 instances of a cycle~ object inside the MC wrapper. If chans is 0, the wrapper object will auto-adapt to the number of channels in its input multichannel signals (using the maximum of all connected signals). If an object does not have any multichannel signals connected to its inlets, the chans attribute will need to have a non-zero value if you want more than one instance.

If chans is changed while the audio is on, the number of instances will not change until audio is restarted. However, if chans is reduced while the audio is on, any extra channels will no longer process audio and will output a zero signal.

initialvalues [list]

The initialvalues attribute only applies to object creation time so it must be set via a typed-in argument. initialvalues sets the first (and only the first) initial argument for successive instances in the MC wrapper. For example, typing mc.cycle~ @chans 4 @initialvalues 50 60 70 80 would assign an initial frequency to the cycle~ instances inside the wrapper. The first instance would be assigned a frequency of 50, the second a frequency of 60, the third 70, and the fourth 80. Note that initialvalues does not determine the actual instance count; this can be done using the chans attribute. If there are more instances than elements for the initialvalues attribute, those instances are instantiated with the default value.

To set a default value of an argument for all instances, type it as an argument before any typed-in attributes. For example, modifying our example above: mc.cycle~ 100 @chans 10 @initialvalues 50 60 70 80. In this example, the first four instances are set as before, but the next six are created with a frequency argument of 100.

To change instance values or attributes after the wrapper object has been created, use the setvalue, applyvalues, or replicatevalues messages.

values [list]

You can use values as an alternate name for the initialvalues attribute.

target [int]

The target attribute sets an index for targeting specific wrapper instances. Subsequent messages are directed to an individual instance instead of all instances. It is strongly recommended you use the more reliable setvalue message instead of the target attribute. The voice index of setvalue will override the current setting of target. When target is 0, incoming messages are sent to all instances. When target is -1, incoming messages do nothing. Note that target only affects messages, not setting attribute values.

usebusymap [int]

When usebusymap is enabled, the MC wrapper controls whether individual instances process audio using a busy map maintained by either an mc.noteallocator~ or mc.voiceallocator~ object. When a channel in the busy map is marked as "free" or "released" no audio processing occurs by any instance on the channel corresponding to the voice index. When usebusymap is disabled, instances in the MC wrapper process audio at all times. This will also be true if usebusymap is enabled and there is no local or named busy map available. (See the busymapname attribute for a description of local and named busy maps). For brevity the name bz can also be used.

zero [int]

When the zero attribute is enabled, channels in the MC wrapper due to the use of a busy map output zero signals. To save a small amount of CPU at the risk of loud and unpleasant noises due to uncleared signal data, you can disable zero. In this case, disabled channels in the MC wrapper do nothing to their output channels. If usebusymap is disabled or there is no active local or named busy map available, the setting of the zero attribute has no effect.

Conveniently, when usebusymap is enabled in mc.mixdown~ object, disabled channels are not mixed to the output. When unused signals from wrapped objects with zero disabled feed into mc.mixdown~, they will be ignored, reducing the risk of unpleasantness getting past the mix output.

busymapname [symbol]

When the usebusymap attribute is enabled, an MC wrapper object uses the local busy map of any mc.voiceallocator~ or mc.noteallocator~ in the same patcher by default. To use a named global busy map instead, set the busymapname attribute to the desired name. For brevity the name @bzname can also be used.

Messages

signal

The abs~ object takes an input signal and output only the absolute (non-negative) translation of that signal - all negative values in the input signal are converted to positive values in the output.

Multichannel Group Messages

deviate

Arguments

range [float]
message-name [symbol]
center-value [float]
upper-range [float]

Generate a random value for each channel around a center value. An optional number after the center value specifies the upper range size so it can be different from the lower range size.
Example: deviate 100 cutoff 1000 will generate random values for the cutoff attribute of the objects in the wrapper centered around 1000 Hz (between 900 and 1100 Hz). deviate 100 1000 200 sends float messages to the objects in the wrapper with random values between 900 and 1200.
If no message name is provided, a float message is used by default.

exponential

Arguments

exponent [float]
message-name [symbol]
multiplier [float]

The exponential message generates an exponential series. The first argument is N and the second (optional) argument is K in the following expression:
K * exp(-1 * N * channel) where channel starts at 0 for the first channel.
If the second argument is not present the default value is 1. Example: exponential 1 10 would generate, for four channels, values of 10, 3.678, 1.353, and 0.498. exponential -1 2 would generate 2, 5.437, 14.78, and 40.17.
If no message name is provided, a float message is used by default.

scaledexponential

Arguments

exponent [float]
message-name [symbol]
base [float]

The scaledexponential message generates an exponential series with the exponent scaled by the total number of channels. The first argument is N and the second (optional) argument is K in the following expression:
K * exp(-1 * N * (channel / num_channels) where channel starts at 0 for the first channel.
If the second argument is not present the default value is 1. Example: exponential -1 2 would generate, for six channels, values of 2, 2.363, 2.791, 3.297, 3.895, 4.602. scaledexponential -1 2 for four channels would generate 2, 2.568, 3.297, 4.324. scaledexponential provides a way to keep the range of the exponential series roughly the same independent of the number of channels.
If no message name is provided, a float message is used by default.

increment

Arguments

increment-amount [float]
message-name [symbol]
start-value [float]

The increment message generates a range of increasing values for each channel. The range starts at the second argument and increments each channel's value by the first argument. If no message name is provided then a float message is used by default.
Example: increment 5 2 for four channels would generate 2, 7, 12, and 17.
If no message name is provided, a float message is used by default.

harmonic

Arguments

multiplier [float]
message-name [symbol]
fundamental [float]

The harmonic message generates a harmonic series using the second argument as the fundamental frequency ( F ) and the first argument as a multiplier ( N ) in the following expression:
F * (1 + N * channel) where channel starts at 0 for the first channel.
Example: harmonic 1 440 for five channels would generate 440, 880, 1320, 1760, and 2200. harmonic 0.5 440 for four channels would generate 440, 660, 880, and 1100.
If no message name is provided, a float message is used by default.

subharmonic

Arguments

multiplier [float]
message-name [symbol]
fundamental [float]

The subharmonic message generates a subharmonic series using the second argument as the fundamental frequency ( F ) and the first argument as a multiplier ( N ) in the following expression:
F / (1 + N * channel) where channel starts at 0 for the first channel.
Example: subharmonic 1 440 for five channels would generate 440, 220, 146.7, and 110.
If no message name is provided, a float message is used by default.