50_11_1
additional parameters:


This design carries the idea of 50_09_1 a little further: center
frequency and bandwidth are both subject to continuous changes.
The instrument produces glissandoing noise bands.

The amplitude target of EXPON is set to the ratio of the highest
to the lowest center frequency. Then, multiplying the output of
EXPON with the center frequency lets icfq vary from the minimum
to the maximum frequency during the duration of the tone.

The right oscillator (playing a line function from 0 to 1) is fed
a peak deviation in percentages. A minimum percentage is added
before this control signal is scaled by the value of kcfq, thus
making bandwidth dependent on center frequency.

Three notes are played: 1 1/2 octaves up in 4 sec
                        2 1/2 octaves up in 4 sec
                        7 octaves down in 6 sec

The minimum bandwidth is in all case 5% of the center frequency
(thus starting with a pitched noise) and finishes at a maximum of
50% (35%) of the center frequency (coloured noise). (Dodge 1985:
p. 172)

(flowchart)
(.orc and .sco files)

