The time-varying functions linear and expon

    linear(<initial>,<final>)
    expon(<initial>,<final>)

The time interval over which they change is determined by the scope in which they appear in the score. In other words they take their start and end times from the start and end variables. An example of their use is given in the following script:

    Audio rate: 44100;

    Init: ...

    Score 1 sec:
        Every 0.1 secs:
            Print "At time ", Time,
		" linear value=", linear(0,1),
		" expon value=", expon(0.001,1), newline;
            ...
        ...

When invoked this script produces the following output:

    At time 0 linear value=0 expon value=0.001
    At time 0.1 linear value=0.1 expon value=0.00199526
    At time 0.2 linear value=0.2 expon value=0.00398107
    At time 0.3 linear value=0.3 expon value=0.00794328
    At time 0.4 linear value=0.4 expon value=0.0158489
    At time 0.5 linear value=0.5 expon value=0.0316228
    At time 0.6 linear value=0.6 expon value=0.0630957
    At time 0.7 linear value=0.7 expon value=0.125893
    At time 0.8 linear value=0.8 expon value=0.251189
    At time 0.9 linear value=0.9 expon value=0.501187
    At time 1 linear value=1 expon value=1

It should be noted that in the current version of Tao the tools provided for generating time varying functions are somewhat lacking when compared to Csound and its plethora of function table generators and its ability to create multi-segment linear or exponential curves. This deficiency will be addressed in a future version, probably with the introduction of a completely new set of table-based objects for use within a script.