Файл: Morpheus_Operation_Manual.pdf

Z-PLANE FILTER DESCRIPTIONS

The Z-Plane filters are categorized into groups of: Flangers, Vowel Filters, Traditional Filters, Parametric Filters, Instrument Models, etc. A suffix of “4” or “.4” indicates filter is square, not cube and does not contain a Transform 2 axis.

FLANGERS

Members of this filter family contain a series of notches with various depths, widths and frequencies. The traditional flange effect is created by sweeping different frequency notches with a real time controller. Another application for flangers is enhanced dynamic expression at note-on by using velocity to modulate the frequencies of the notches and overall cut-off. These filters can simulate different pick positions on guitar strings and various locations of drum, mallet and cymbal strikes, etc.

F000 Null Filter

F001 Low Pass Flange .4

Morph: Starts with high end roll-off and deep, narrow notches at 500Hz, 100Hz, 200Hz, 400Hz and 800Hz and transforms into less deep, wider notches at 11799Hz, 13813Hz, 16169Hz, 17495Hz and 18928Hz with no roll-off.

Freq. Tracking: Moves the notches in the first frame of the Morph axis up two octaves. The second frame is completely flat. Tracks filter to keyboard frequencies with Note-on key assignment. Controls brightness.

Transform 2: Not used.

F002 Low Pass Flange Bk .4

A series of deep notches spaced at octave intervals morphing to less severe, more closely clustered high frequency notches. An additional lowpass filter is at the start of the Morph, opening as the maximum offset is reached.

Morph: Modulate this to create multi-flanging effects.

Freq. Tracking: Tracks flangers across the keyboard. Velocity controls brightness.

Transform 2: Not used.

F003 Flange 2 .4

This flanger has a series of 6 notches placed at octaves, not linearly. Frame 1 starts with notches at 50, 100, 200, 400, 800, and 1600Hz.

Morph: Moves all of the notches up in frequency to above 10kHz, with decreasing depth. This means that the deepest flanging effect is obtained in the first 1/3 to 1/2 of the morph parameter range.

Note that deep notches can cut out the fundamental of a sound which might decrease the volume of the note.

Freq. Tracking: Moves the notches to 400, 800, 1600, 3200, 6400, 12800Hz, which allows key tracking to keep the “sweet spot” of the flanger centered over the harmonics of the note.

Transform 2: Not used.

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Z-PLANE FILTER DESCRIPTIONS

F004 CubeFlanger

A flanging filter featuring deep notches tuned in octaves and a steep roll-off of high frequencies when all axes have no offset. High settings for Transform 2 can produce some rather metallicsounding overtones. Apart from flanging effects, this filter can be used in much the same way as a standard resonant synth filter.

Morph: Tunes the filter notches.

Freq. Tracking: Controls lowpass filter cutoff point. Transform 2: Increases resonance and introduces some peaks.

F005 Flange3.4

Notches are spaced at a ratio of 1.61 between notch frequencies, starting at 40Hz. This spacing means that notches will not fall on top of all of the harmonics of a sound at once. Instead, they should hit harmonics one at a time as they are swept in frequency. Traditional flangers have notches spaced linearly, not log spaced.

Morph: Moves all of the notches up above 10kHz, with the relative frequency spacing decreasing. The deepest flange effect will happen in the lower 1/3 to 1/5 of the morph parameter range.

Freq. Tracking: Sets the initial tuning of the notches, moving all of the notches up from 40Hz to 325Hz as the base frequency.

Transform 2: Not used.

F006 Flange 4.4

A highly resonant flanger /filter type. Sweeping the Morph axis produces dramatic effects. The Filter Frequency Track parameter can be used to tune the flanger; higher values produce more open sounds.

Morph: Increase to raise the cutoff frequency and vary the gain of the various peaks and notches.

Freq. Tracking: Tunes the filter.

Transform 2: Not used.

F007 Flange 5

A complex flange possessing some vocal-sounding characteristics. Sweeping along the Morph or Freq. Track axes produces flangerlike effects.

Morph: Tunes the notches.

Freq. Tracking: Spreads the notches.

Transform 2: Increase this to move the filter toward a more flat curve.

F008 Flange 6.4

Introduces both peaks and notches which start widely spaced and become more tightly distributed as Morph Offset reaches maximum. The center frequencies for the various filter bands move towards higher ranges as the Morph or Filter Freq. Track parameters are swept upward; the effect is not unlike a sweeping of multiple resonant band-pass filters.

Z-PLANE FILTER DESCRIPTIONS

F009 Flange 6R.4

This is a variation of filter 008, Flange 6.4. It is a bit more reso- nant-sounding, due in part to higher ‘Q’ settings. Sweeping the Morph axis can produce the syllable ‘yi’.

Morph: Sweep filter frequency bands up and together when modulated in a positive direction.

Freq. Tracking: Sweep filter frequency bands up and together when modulated in a positive direction.

Transform 2: Not used.

F010 Flanger 7.4

A series of harmonically related notches is moved from the lowermidrange to the upper-midrange as this filter is moved along the Frequency Tracking axis. Morphing brings in the flanging effect

Morph: Use this to sweep the notches. Freq. Tracking: Use this to tune the notches.

Transform 2: Not used.

F011 BriteFlnge.4

A series of notches, tuned in octaves, are swept upward and finally converge at 19.5kHz as this filter is pushed up along the Morph axis. A small bump at about 15kHz is introduced to maintain brightness when Morph is at completely offset.

Morph: Increasing this value sweeps the filter notches upward and together.

Freq. Tracking: Increasing this value raises the lowpass filter cutoff point.

Transform 2: Not used.

F012 Flng>Flng1

Morph: Sweeps from flange 1 to flange 2

Freq. Tracking: Provides key tracking to maintain spectrum.

Transform 2: Provides volume and brightness control with velocity and/or key position

Comments: Key tracking enhances the depth of the flange. Try adding velocity to Frequency Tracking for more “Fun”.

F013 0>Flng2

Morph: Reveals flat to flange filter

Freq. Tracking: Provides key tracking to maintain spectrum Transform 2: Adds volume, different flange

Comments: Nice for introducing a subtle flange to a pure sound. Velocity has a natural effect increasing flange depth, volume and brightness.

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