40_01_1
additional parameters: itf


The sinus which is applied to the transfer function oscillates
between the values of +255 and -255. The maximum amplitude value
is in general half the table length of the transfer function.

The incoming sinus is translated according to the transfer
function. For a strict 1:1 linear mapping, the GEN functions in
this example should have been set to maximum ordinate value of
256 (instead of 1), plus (not to forget) inhibiting rescaling of
the table. Preceding the GEN routine number by a minus sign
inhibits normalization of the values. In this example, the
ordinate is in a range +-1, so the translation will produce
a normalized signal. Finally, the multiplier will scale the
signal to the desired maximum amplitude.

The first section plays 5 different transfer functions at the
same pitch and amplitude.

The three linear ones are shown in the flow chart, a parabolic
(diabolic ?) and a cubic function follow.

The most interesting tone is produced by f33. In the end of the
notes, one hears how the timbre melts. The remaining two section
play a dominant 7th chord 'on' that transfer function. (Dodge
1985: pp. 130-132)

(flowchart)
(.orc and .sco files)

