Exponential ramp generator Use the curve~ object to produce a signal that goes from an initial to target value over a specified time. It is similar to the line~ object, it produces non-linear ramps using a piecewise approximation of an exponential function. Cycling '74 MSP MSP Functions Destination Value TEXT_HERE Ramp Time TEXT_HERE Curve Parameter (-1.0 to 1.0) TEXT_HERE Output Ramp TEXT_HERE bang When Curve Reaches Destination TEXT_HERE Initial value The first argument sets an initial value for the signal output. The default value for the parameter is 0. Curve parameter The second argument sets the initial curve parameter. The default value for the curve parameter is 0. Set the target value to be arrived at In left inlet: The number is the target value, to be arrived at in the time specified by the number in the middle inlet. If no time has been specified since the last target value, the time is considered to be 0 and the output signal jumps immediately to the target value (ints are converted to floats). Set the target value to be arrived at In left inlet: The number is the target value, to be arrived at in the time specified by the number in the middle inlet. If no time has been specified since the last target value, the time is considered to be 0 and the output signal jumps immediately to the target value. Set the target value, ramp time, and curve parameter In left inlet: The first number specifies a target value; the second number specifies an amount of time, in milliseconds, to arrive at that value; and the optional third number specifies a curve parameter, for which values from 0 to 1 produce an exponential curve and values from -1 to 0 produce a logarithmic curve. The closer to 0 the curve parameter is, the more the curve resembles a straight line, and the farther away the parameter is from 0, the more the curve resembles a step. In the specified amount of time, curve~ generates an exponential ramp signal from the currently stored value to the target value.

In middle inlet: A list may be used to specify time in one of the Max time formats. Set the target value, ramp time, and curve parameter In left inlet: The first number specifies a target value; the second number specifies an amount of time, in milliseconds, to arrive at that value; and the optional third number specifies a curve parameter, for which values from 0 to 1 produce an exponential curve and values from -1 to 0 produce a logarithmic curve. The closer to 0 the curve parameter is, the more the curve resembles a straight line, and the farther away the parameter is from 0, the more the curve resembles a step. In the specified amount of time, curve~ generates an exponential ramp signal from the currently stored value to the target value.

In middle inlet: A list may be used to specify time in one of the Max time formats. Adjust the non-linear shaping parameters of curve~ The word factor followed by a float will adjust the non-linear shaping parameters of curve~. Pause the internal exponential ramp In left inlet: Pauses the internal exponential ramp but does not change the target value nor clear pending target-time-parameter triples. curve~ will continue outputting whatever value was its current value when the pause message was received, until either it receives a resume message or until a new ramp is input. Stop and clear the internal exponential ramp In left inlet: Stops the internal exponential ramp and clears pending target-time parameter triples. curve~ will continue outputting whatever value was its current value when the stop message was received, resetting its target value to that value. Pause the internal exponential ramp In left inlet: Resumes the internal exponential ramp and subsequent pending target-time pairs if the curve~ object was paused as a result of the pause message. This object uses the Max time format syntax; envelope times can be either single valued fixed or tempo-relative. The curve~ object produces non-linear ramps using a piecewise approximation of an exponential function. You specify the parameter to this exponential function in the curve~ object's right inlet. Values from 0 to 1 produce an "exponential" curve when increasing in value and values from -1 to 0 produce a "logarithmic" curve. The closer to 0 the curve parameter is, the closer the curve is to a straight line, and the farther away the parameter is from 0, the steeper the curve. curve~ can also accept a list of up to two or three arguments (the previous curve parameter is used if there are two arguments), or a list with two or more value, time, parameter triples. The curve~ is limited to 42 such triples in a single list. The object's approximation of the exponential becomes better when the vector size is smaller, but the object also becomes more computationally expensive. Out left outlet: The current target value, or an exponential curve moving toward the target value according to the most recently received target value, transition time, and curve parameter. Out right outlet: When curve~ has finished generating all of its ramps, bang is sent out.