fumikawa / logue-fx

Custom effects for Korg logue-sdk compatible synths. Contains reusable header to create unified code for any FX type.

logue-fx

Custom effects for Korg logue-sdk compatible synths

You can get the lastest precompiled versions of the effects in releases section.

Project structure

• lodue-sdk/ : My own logue-sdk fork with optimized makefiles and reduced project footprint.
• inc/fxwrapper.h : FX wrapper that allows to make all effect types from one source file.
• src/ : Effects source files.
• ...fx/ : Effects project files.

Effects description

• Crusher - Bit crusher and decimator effect.
• Gator - Kaossilator-style gate arpeggiator.
• Hyper - unison effect inspired by supersaw/hypersaw.
• Kompressor - RMS downward compressor/expander.
• Looper - Kaossilator-style loop recorder.
• Vibrator - frequency vibrato and pitch shift effect.
• LFO - frequency and amplitude vibrato with selectable waveform.

Effects Parameters

Effect	time / A knob	depth / B knob	shift depth / FX button + B knob
Crusher	Sampling frequency - 48000...480Hz	Bit depth - 24...1 bit	Dry/wet mix
Gator	Pattern select - KAOSSILATOR Parameter List	Pattern restart - pass center point	-
Hyper	Detune - 0...1 semitone	Unision voices - 1 to 12 pairs, each pair detuned by additional +/- detune value	Dry/wet mix
Kompressor	Threshold level - -80...0dB	Ratio - expand ∞:1...1:1 (left to center) - compress 1:1...∞:1 (center to right)	Dry/wet mix
Looper	Loop length - linked to the current BPM and sticked to 16, 8, 4, 2, 1, ½, ¼, ⅛, 1⁄16 beats	Play/Record mode - Overwrite (left third) - Play (center third) - Overdub (right third)	Record format - Stereo (d100-d50) - Stereo packed (d49-d0) - Mono (w0-w49) - Mono packed (w50-w100)
Vibrator	Vibrato rate - 0...30Hz	Vibrato depth - 0...1 semitone	Pitch shift - -12...+12 semitones
LFO	Vibrato rate - 0...30Hz	Vibrato depth - 0...1 semitone	Vibrato type - AMod Sine (d100-d80) - AMod Triangle (d79-d60) - AMod Saw (d59-d40) - AMod Square (d39-d20) - AMod S&H (d19-d0) - PMod Sine (w0-d19) - PMod Triangle (w20-w39) - PMod Saw (w40-w59) - PMod Square (w60-w79) - PMod S&H (w80-w100)

Notes

• Most of the effects for all three effect slots.
• The third effect parameter control is not available for Modulation FX thus several effects are limited in control in this slot.
• Due to NTS-1 SDRAM size limitation loop length automatically reduced depending on the record format and current BPM according to the table below:

Record format	BPM < 75	75 ≤ BPM < 150
Stereo	4 beats max	8 beats max
Stereo packed	8 beats max	-
Mono	8 beats max	-
Mono packed	-	-