LOFISOUNDplays chip waveslight / dark

LOFI

LOFI is a chip voice: pulse, triangle, saw, noise and a 4-bit wave RAM, with the coarse volume steps and pitch tricks of old game consoles.

plays chip waves

Half

SOUND

Reach it

a custom build, FELUCCA_LOFI=1 (else on ANALOG)

ALGORITHM

CHIP

Engine

LOFI

Factory sounds

5

Playing it

WAVE on MAIN picks the waveform. DUTY sets the pulse width; with WAVE at WRAM it picks one of the built-in 4-bit wave tables instead (shown as WAV# and the table's name). CRSH adds bit and rate reduction, and REL is the release.

LOFI is on the sidelines: SQRL-1's build leaves it out. A custom build with FELUCCA_LOFI=1 brings it back, picked on the PAIR page (hold HOME, tap GLO, KNOB 1). Without it, a LOFI sound in a project or a saved sound plays on ANALOG.

MAIN

Pages

CHIP

CHIP picks the character: 4BIT, 4B/2, 8BIT and 1BIT set how coarse the output is. STEP behaves like the old sound chips themselves: a stepped 4-bit volume envelope replaces the smooth one, the triangle becomes a 32-step staircase, the pulse widths are 12.5, 25, 50 and 75 %, and CRSH (shown as DCY) sets the envelope's decay.

Knob	Label	Range	Starts at
1	CHIP	4BIT 4B/2 8BIT 1BIT STEP	4BIT
2	WAVE	PLS TRI SAW NOIS WRAM	PLS
3	DUTY	0 .. 127	32
4	CRSH	0% .. 100%	0%

MOTN

MOTN holds the motion inside the note. SWP bends the pitch down after the note starts (the falling "pew"), VIB adds vibrato, and ARP cycles the note through an octave or a major or minor chord, the way chip music fakes chords on one voice. TONE is a low-pass: turn it down to soften the edges.

Knob	Label	Range	Starts at
1	SWP	0% .. 100%	0%
2	VIB	0% .. 100%	16%
3	ARP	OFF OCT MAJ MIN	OFF
4	TONE	0% .. 100%	100%

Where it comes from

firmware/src/eng_lofi.c, Felucca's engine (GPL-3.0), by Leo Kuroshita, Hügelton Instruments. The wave RAM tables are the author's own shapes, built from simple formulas.