02_42_1
additional parameters: iamp2, ifq2, iamp3, ifq3 ipcf, 
                       iatt1, idec1, iatt2, idec2, iatt3, idec3

This design emulates a pitched drum with control on the pitch
contour.

One oscillator produces the fundamental wave (160Hz) and the
other two oscillators create inharmonic partials: 225, 300, 375,
450 Hz for the second oscillator and 468, 549, 610, 671, 732,
915, 1037 and 1098 Hz for the third oscillator. 

The amplitude envelopes are given by three EXPSEG unit
generators. The rise time for the fundamental is 10 or 30 msec,
its steady state is 0 or 30 msec, and its decay is set to
1.6 seconds. The remaining two EXPSEG modules ensure a fast decay
of the inharmonic partials. In this example, the set of partials
take .6 and .3 seconds respectively to decay to 1/1000th of their
initial amplitude.

The pitch evolution is following the functions f31 (stays the
same), f32 (increasing about a third), f1 (sinus with an
amplitude of a third) and f33 (decreasing a third).

The examples are ordered in the same sequence. The last tone is
to demonstrate the degenerate effect of a long rise paired with a
very brief decay of the inharmonic contributors. (Risset 1969:
#440)

The instrument can also be classified in main group 03. This
would underline the functional difference of the oscillators.
Nevertheless, we prefer to focus on the technical parallelism of
the design.

(flowchart)
(.orc and .sco files)

