Siegfried Kullmann updates SQ-8L to v0.91b

Siegfried Kullmann has updated SQ-8L to v0.91b which includes new and improved LFO and EG models, immediate parameter changes and minor bug fixes.

Changes:

• Parameter changes now immediately affect playing voices (except envelope parameters).
• Fixed bug in DCA4 modulation causing voices to be never terminated.
• Fixed problem with high CPU load after playing one-shot waveforms.
• Voice restart should work correctly now.
• LOOP voice stealing mode removed. The former HQ mode is now called SOFT.
• New LFO implementation with much more accurate frequency and delay and the following new features (see paragraph D.2.):
  • Humanization (randomize LFO frequency).
    • ON = emulate SQ80/ESQ1 (no humanization for frequencies<7 or while fading)
    • 1x = humanize always
    • 2x, 4x, 8x, 16x = humanize more
  • All waveforms of OSC1-3 can be used for LFOs (except the drum kits)
  • Frequency modulation (FREQMOD).
  • Adjustable phase offset (PHS) (in addition to trigger phase).
  • Twin mode (PHS parameter, indicated by "T" in the value): Two phase-shifted waves are subtracted from each other.
  • 4 Playback modes (PLAY):
    • FWD = forward
    • REV = reversed (=backwards)
    • 1XF = one-shot forward
    • 1XR = one-shot reversed
  • Smoothing (SMTH, applied before amplitude modulation).
  • Different modes for amplitude/frequency modulators (AM, FM):
    • UNI = unipolar (source is clipped below zero, used to correctly emulate the AM of SQ80/ESQ1 LFOs)
    • BIP = bipolar (was incorrectly used for AM until this version)
    • PHS = modulate LFO phase offset instead
    • SMT = modulate LFO smoothing instead
  • Modes for LFO delay:
    • EMU = emulate SQ80/ESQ1
    • SMTH = smoother fading
  • Frequency range extended from 0..63 to 0..127
• New envelope features (see paragraph D.3.):
  • Start level (L0) instead of fixed to zero.
  • CYC parameter for each envelope (=play full cycle without sustain).
  • Smoothing filter (SMTH).
  • Parameter MODE-T1V switches between:
    • T1 = Velocity modulates attack time (T1) by amount in T1V
    • SMT = Velocity modulates smoothness (SMTH) by amount in T1V
  • Different output shapers (SHAPE):
    • OFF = no shaping
    • EXP..EXP4 = exponential shaping
    • TAN..TAN3 = hyperbolic tangent shaping
• New emulation features (see also paragraph D.1.):
  • Smoothing of DCA1-3 volumes:
    • EMU = emulate SQ80/ESQ1
    • FAST = less accurate but without latency
  • Smoothing of DCA4 volume:
    • EMU = emulate SQ80/ESQ1 (soft attack)
    • HARD = hard attack
  • MUFFLE:
    • OFF = crisp sound
    • ON = attenuate high frequencies to sound more like the SQ80/ESQ1
  • DC offset blocking filter (DC-BLOCK):
    • SMART = use filter when needed (when SYNC=ON)
    • ON = always on
    • OFF = always off
• Changes in sound banks:
  • Banks A, B = user banks
  • Bank C = SQ8L factory bank
  • Bank D = original SQ80 factory bank
• GUI changes:
  • Bigger GUI with buttons to select parameter pages (see paragraph E.3.).
  • Most display pages can now be scrolled/toggled to show additional parameters (see paragraph E.2.)
  • Fixed bug with window scaling causing wrong placement of GUI controls (has not been tested).
  • Fixed problems with "jumping mouse" (I hope so).
  • The knobs and buttons should no longer steal the keyboard focus (has not been tested).
  • Several emulation parameters can be overridden by settings in the options menu.
  • Added modulation source usage window (temporary, see paragraph E.4.).