LinPlug Spectral - Manual (Page 86)

- Global options: Global options are valid for all Spectral Instruments in
every song/project, they store automatically and work in each and every
instance of Spectral that will be opened on your computer. So neither
loading of a preset or a song/project will affect them.
Per Preset Options
Bend Range Up is used to set the Spectral's response to pitch bend
messages in the upwards direction. Bend Range can be set from 0 to 24
semitones.
Bend Range Down is used to set the Spectral's response to pitch bend
messages in the downwards direction. Bend Range can be set from 0 to 24
semitones. Note that if the “link” setting is chosen, the Bend Range for
downwards bending is the same as for upwards bending.
Next to these Bend settings there are 2 rows of 4 switches each, controlling
whether or not any received pitch bend messages control the Oscillator
Pitch (upper row) and the Filter Frequency (lower row, provided the Filter
Track parameter is set to any value not null).
Next is the “Oscillator FM Mode” setting. This option is rather for the
advanced FM sound designer. It has three settings: Off, HP1 and HP2.
Off means that there is no filtering involved. However, since the Spectral
FM cross modulation is a true FM it can - when the routing results in any
kind of self-modulation – lead to a “blocked” oscillator. This happens in
example when an oscillator modulates itself: once the modulation reduced
the frequency to 0 Hz, the oscillator stopped and will remain in this Stop
forever. To overcome this we added a High Pass filter.
HP 1 is the older one, he does the job but has some side effects you can
possibly hear when you had a more complex modulation (e.g.Osc 4
modulates 3, which modules 2, which modulates Osc 1), at note start it
takes some time to get a stable waveform.
HP 2 is a more complex design which reacts much faster, suppresses any
blocking more effective and also overall affects sound less in most cases.
So which options should you choose when ?
- Use Off when a particular sound does not have any direct or indirect self
modulation