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5
Program Parameters
vo cal formant 1
Unique to the Ion. Formant filters are modeled on the human voice.
This 3-band (3 bandpass filters) version emulates the "ah" and "oo"
vowel sounds.
vo cal formant 2
Unique to the Ion. A 3-band formant filter which emulates the "oh" and
"ee" vowel sounds.
vo cal formant 3
Unique to the Ion. A 5-band formant filter based on an idealized model
of the vocal tract.
ba nd limit
Unique to the Ion. A 2-pole highpass filter and a 2-pole lowpass filter in
series, limiting the signal to everything in between them. The resonance
control adjusts the bandwidth.
Filter [edit]: Frequency
Page:
Soft Button:
Range:
Default:
This parameter sets the cutoff frequency for the filter . Depending on
the filter type, the cutoff frequency is either the point above or below
which the audio frequencies begin to diminish. In some filter types there
are actually multiple frequencies emphasized and/or reduced; sweeping
the frequency in this case shifts them all at once.
Filter 2: the [offset] button
This button toggles Filter 2's frequency knob between Absolute and
Offset modes. In Absolute mode, Filter 2's frequency knob functions
identically to Filter 1's and adjusts the filter frequency. In Offset mode,
Filter 2's frequency is a multiple of Filter 1's such that adjusting or
modulating Filter 1's frequency also adjusts Filter 2's. In Offset mode
adjusting Filter 2's frequency adjusts the constant amount by which it is
offset from Filter 1. See the sidebar notes for more information.
Filter [edit]: Resonance
Page:
Soft Button:
Range:
Default:
An increase in this parameter adds emphasis to the current filter
frequency. At its higher settings, the sound can begin to "whistle," or self-
oscillate.
62
1
2
20 Hz – 20 KHz or -4.0 to 4.0 octaves
20 KHz or +4.0 octaves
1
3
0-100%
0
Filter 2 and Offset mode
If the [offset] button has been pressed, the
frequency value for Filter 2 will be displayed
in terms of its relationship to Filter 1's
frequency. A setting of +1.0 octaves means
Filter 2's frequency is one octave higher
than Filter 1's, so when Filter 1's frequency
is 220 Hz then Filter 2's frequency will be
440 Hz
Note: When it is offset from Filter 1, Filter 2
follows the Envelope Amt and Key Track
settings of Filter 1. If you also use these
controls for Filter 2, this will compound the
impact of these parameters and affect the
Offset relationship of the filters.
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