mc.matrix~ Reference

Signal routing and mixing matrix (multichannel)

mc.matrix~

Description

matrix~ is an array of signal connectors and mixers (adders). It can have any number of inlets and outlets. Signals entering at each inlet can be routed to one or more of the outlets, with a variable amount of gain. If an outlet is connected to more than one inlet, its output signal is the sum of the signals from the inlets.
When the matrix~ object is created as mcs.matrix~ all of its signal inlets are combined into a single multichannel inlet and all of its signal outlets are combined into a single multichannel outlet. The behavior of mcs.matrix~ is otherwise identical to matrix~.

Discussion

The matrix~ object has two modes of operation: "binary" and non-binary. In binary mode, connections act like simple switches, and always have unity gain. This mode is faster, but audible clicks will occur if you're listening to the outputs of this object when connections are made and broken. In non-binary mode, connections are gain stages, i.e. they can scale the signal by some amount other than zero and one. They also provide an adjustable ramping time over which the gain values are changed. This allows signals to be switched without creating audible clicks.

Arguments

inlets [int]

The first argument specifies the number of inlets.

outlets [int]

The second argument specifies the number of outlets.

connection-gain [float]

Optional

If a float value is provided as a third argument, matrix~ operates in its non-binary mode. The argument sets the gain value that will be used when connections are created.

Attributes

ramp [atom_long]

Ramp Time (ms)

Common Box Attributes

Multichannel Group Attributes

Messages

list

Arguments

inlet-to-outlet indices [list]
In left inlet: A list of three ints may be used to connect inlets and outlets when the matrix~ object is in binary mode. The first int specifies the inlet, the second int specifies the outlet, and a third int is used to specify connection or disconnection. If the third int is nonzero value, the inlet of the first int will be connected to the outlet specified by the second int. A zero value for the third int in the list disconnects the inlet-outlet pair.

If the matrix~ object is operating in non-binary mode, A list of two ints followed by a float sets the gain of the connection between inlet i and outlet o to the value specified by the float.

Note: To specify the gain of individual connections, you must use three-element list messages rather than the connect message. Connections formed with the connect message always have a gain specified by the third argument initially given to the matrix~ object. However, subsequent list messages can alter the gain of connections formed with the connect message. The addition of an optional fourth element to the list message can be used to specify a ramp time, in milliseconds, for the individual connection (e.g., 1 2 .8 500 would connect the first inlet to the second outlet and specify a gain of .8 and a ramp time of .5 seconds).

clear

In left inlet: The word clear removes all connections.

connect

Arguments

inlet-to-outlet indices [list]
In left inlet: The word connect, followed by one or more ints, will connect any inlet specified by the first int to the outlet or outlets specified by the remaining ints in the list. Inlets and outlets are numbered from left to right, starting at zero. For example, the message connect 0 0 1 would connect the first inlet from the left to the leftmost outlet and the second outlet from the left. If the list is appended with a float value and the object is in non-binary mode, this value will set the gain for all specified connections.

disconnect

Arguments

inlet-to-outlet indices [list]
In left inlet: The word disconnect, followed by one or more ints, will disconnect any inlet specified by the first int to the outlet or outlets specified by the remaining ints in the list.

dump

In left inlet: The word dump causes the current state of all matrix~ object connections to be sent out the rightmost outlet of the object in the form of a list for each connection. The list consists of two numbers which specify the inlet and outlet, followed by a float which specifies the gain for the connection. Note that in non-binary mode the current gains are not necessarily the same as the target gains of all matrix~ object connections, since a connection's gain can ramp to its new target over time.

dumptarget

In left inlet: The word dumptarget causes the target state of all matrix~ object connections to be sent out the rightmost outlet of the object in the form of a list for each connection. The list consists of two numbers which specify the inlet and outlet, followed by a float which specifies the target gain for the connection. Note that in non-binary mode the target gains are not necessarily the same as the current gains, which can be accessed with the dump message.

print

In left inlet: The word print causes the current state of all matrix~ object connections to be printed in the Max Console in the form of a list for each connection. The list consists of two numbers which specify the inlet and outlet, followed by a float which specifies the gain for the connection.

Multichannel Group Messages

Output

list

Out right outlet: A set of lists describing the current or target state of all matrix~ object connections will be sent out the right outlet in response to a dump or dumptarget message.

signal

The output signals for each outlet are the sum of their connected inputs, scaled by the gain values of the connections.

See Also

Name Description
gate~
matrixctrl
receive~
router
selector~
send~