FB-2823: choose a filter character for the performance

Choose the phrase before the filter personality

FB-2823 combines dual oscillators, ring modulation, noise and sample-and-hold with a high-pass and four low-pass models. It is useful for a pointed lead, a compact bass or a polyphonic texture whose movement develops around the notes. Start with the intended phrase and a simple source balance.

A model change is easier to judge before a patch becomes crowded with modulation and effects. Use the lowest and highest notes of the part and include a held note where the filter's response is exposed. Keep the harmony available for comparison.

Rev models and FB have different roles

Rev I, Rev II and Rev III provide their own low-pass implementations. FB adds the model-specific Morph and Spread controls: Morph changes its slope, and Spread creates differences between its stereo paths. Those controls do not turn the Rev models into stereo filters.

The high-pass sits before the low-pass. Oscillator sync, ring and sample-and-hold provide separate source and movement decisions. Voice count, mode, unison, drift and MPE settings determine the performed behaviour. Glide is a time constant displayed in milliseconds, not an interval-scaled milliseconds-per-octave parameter.

Workflow one: a sync lead with a readable note contour

Use a phrase with articulated notes and a sustained ending.

1. Build a clear two-oscillator balance and introduce sync for the desired sharper relationship.
2. Choose a low-pass model before setting detailed cutoff, resonance and envelope amounts.
3. Keep the high-pass appropriate to the line's register and compare the whole melody.
4. Set voice behaviour and glide for the intended note overlaps.
5. Add a performance or modulation gesture only after the static phrase works.

If one resonant region makes particular notes much more insistent, reduce that emphasis or reconsider the model before making the whole lead louder. Sync colour can provide a strong identity while the envelope still supplies the phrase's articulation.

Workflow two: a pad using the FB stereo filter

Choose a slower chord progression and leave time to hear its transitions.

1. Select FB and establish the source, envelope and cutoff relationships with Spread restrained.
2. Move Morph to choose a useful slope, then introduce Spread gradually.
3. Add a little drift or another restrained modulation only if the held chords need more development.
4. Compare the progression in stereo and mono with the bass and featured part playing.
5. Set effects after the filter movement and voice balance are useful.

A wider filter response can make a chord feel more animated, but it should not make the centre vague or the next chord difficult to recognise. Revisit release and resonance before asking a longer reverb to connect an already crowded pad. Use velocity response to make stronger playing produce a deliberate contour change before adding more continuous movement. That can keep the pad expressive while leaving its sustained centre relatively stable.

A creative use: stepped movement with a softened edge

Use sample-and-hold to create a repeating or changing tonal gesture on a short synth phrase. Choose its source and clock deliberately, then use Lag to soften the transition when an abrupt step is too conspicuous. Begin with a small destination amount so the notes remain the anchor.

Combine the gesture with the arpeggiator or sequencer only after each part is readable. One can establish note timing while the other changes the tone. Hear several complete cycles and a section ending before choosing the final amount.

Check expression against the controller

MPE is available, but an ordinary MIDI keyboard remains useful. Set the controller mode and pitch-bend behaviour for the performance you actually intend, and compare quiet notes, hard accents and overlaps before printing.

Keep FB-2823 when its oscillator relationship, filter model and movement serve separate musical jobs. A restrained stereo filter or a focused sync lead can be more useful than a patch that makes every available modulation equally prominent.