timowest / rogue Goto Github PK

PM doesn't work

Use the ones from Casio CZ 101

• Sawtooth (Sine Saw)
• Square (Sine Square)
• Pulse
• Double sine
• Saw pulse
• Resonance 1 (Sawtooth)
• Resonance 2 (Triangle)
• Resonance 3 (Trapezoid)

http://www.vintagesynth.com/manuals/CasioCZSeries-SoundSynthesisHandbook.pdf
http://en.wikipedia.org/wiki/Phase_distortion_synthesis
http://www.madtheory.com/CZ%20article/CZ%20article.htm
http://www.amazona.de/workshop-casio-czvz-und-die-grundlagen-der-phase-distortion-synthesis/3

Instead of encoding the inversion in the waveform options, it should be a separate parameter

Configuration matrix

          width  scale offset bandlimited
sin       -      -     -      yes
saw (s)   -      1     0      yes
tri (s)   -      1     0      -            
pulse     0.5    -     -      yes
slope     0.5    -     -      yes
jp8k tri  -      1     0      -
jp8k ssaw ?      ?     ?      -
slices    -      1     -      yes (scale limited to 0-1)
sinusoids 0.5    -     -      yes
noise     -      -     -      yes

• Add more forms of phase distortion
  http://www.electricdruid.net/index.php?page=info.pdsynthesis
  http://mutable-instruments.net/shruthi1/specs

Filter buffer is silent in voice

Filter volume should be applied at the final mix and not when filters buffers are written, this way filter cascading is easier

Add pan modulation

Add GTK based GUI

e.g. chorus, phaser, delay, reverb

http://web.archive.org/web/20090319080028/http://ardour.org/plugins

CAPS plugins

• StereoChorusII2x2 (chorus)
• StereoPhaserII2x2 (phaser)
• Scape (delay)
• Plate2x2 (reverb)

Related data : http://www.csounds.com/man/appendix/formants.htm

Add presets as ttl files

Nord Lead categorization:
Acoustic, Arpeggio, Bass, Classic, Drum, Fantasy, FX, Lead, Organ, Pad, Piano, Synth

Add modulation matrix

Interpolate between modulation values.

More waveforms

http://labs.makemachine.net/2010/09/wavetable-synthesis-round-1/
http://quadrophone.com/massive-wavetable-images/
http://malekkoheavyindustry.com/wp-content/uploads/megawave_waveguide_rev1.2.pdf

Add DC offset correction at the post-processing stage

• PM (amount)
• Sync (on/off)
• Out: None / Add / RM / AM

ports: input (0,1,2), pm (0-1), sync (0,1), out_mod (0,1,2,3)

https://ccrma.stanford.edu/software/snd/snd/fm.html
http://www.kvraudio.com/forum/printview.php?t=156519&start=0

Add pulse width modulation

LFO doesn't participate in modulation

Add start phase port to osc and lfo

e.g. a version based on Beat Frei's Digital Sound Generation paper

Remove presets tab

./presetgen.py
Traceback (most recent call last):
File "./presetgen.py", line 120, in
main()
File "./presetgen.py", line 113, in main
dcf(1, {"type": 2}))
File "./presetgen.py", line 86, in preset
ttlFile = open("presets/" +name+".ttl", "w")
IOError: [Errno 2] No such file or directory: 'presets/test.ttl'
make: *** [presets.ttl] Error 1

Forgot pushing a few files? ;-)

Add envelope pre delay

Add central LFO

• Poly - note on resets voice LFO
• Free - no resets (global LFO)
• Mono - note on resets all LFOs

Free
in configLFO sync lfo phase to data.lfo.phase
in post process data.lfo.phase is moved forward

Mono:
on note-on reset all lfos

• playmode - poly, mono, legato (untested)
• glide time - 0-1 (untested)
• pitchbend range - 0-24 (untested)

Evaluate alternative to current Moog ladder filter implementation

http://www.acoustics.ed.ac.uk/wp-content/uploads/AMT_MSc_FinalProjects/2012__Daly__AMT_MSc_FinalProject_MoogVCF.pdf

Related
http://www.acoustics.hut.fi/publications/papers/icassp13-moog/
http://iipl.tk/paper/ICASSP2013/pdfs/0000729.pdf
Fun with Sigmoid - http://www.tinygod.com/sigmoid/
Moog Ladders - https://github.com/ddiakopoulos/MoogLadders

• modes FM, Ring
• sources OSC1, OSC2, OSC3, OSC4

New ports for osc:s: oscN_mod_type, oscN_mod_source

Add AHDSR envelope

new (more stylish) UI

resources

• http://www.tone2.com/html/electrax_synthesizer__vst_au.html
• http://www.bestservice.de/img_share/image/Products/tone2/Saurus/Tone2_Saurus_screen.jpg
• http://www.audjoo.com/Helix/img/full_screenshot.png
• http://www.image-line.com/plugins/product/7/Synths/Harmless/
• http://create-music.net/wp-content/uploads/2010/12/cableguys_curve.png

Qt

• http://dronecolony.com/2012/12/11/customized-qdial-with-qss-support/

MIDI pitch 74 causes weird noise for sawtooth

Should be fixed here https://github.com/timowest/rogue/blob/master/src/voice.cpp#L347

visualization for envelope curve

Rename LFO symmetry to width

Interpolate width, param1 and param2

The params could be submitted as a [w_old, w_new, p1_old, p1_new, p2_old, p2_new] array

• White
• Pink
• Lowpass (width -> res)
• Bandpass (width -> res)

http://www.guyd2.com/kfms/modules_k2.html

Filter pan doesn't work properly, seems to be off to the left

Add VA oscillators that resemble analog oscillators

Sawtooth

• http://www.acoustics.hut.fi/publications/papers/jasp-moog/
• http://rdaedalus.blogspot.fi/2010/09/sawtooth-waveforms.html
• http://www.kvraudio.com/forum/printview.php?t=234651&start=0

General

• http://rhythminmind.net/1313/?p=557
• http://mysite.verizon.net/vze6s1hi/moog1p/id3.html
• https://github.com/swh/lv2/blob/master/plugins/analogue_osc-swh.lv2/plugin.xml
• apply 6db / 50Hz highpass to standard waves ?!?

types: saw, tri/saw, pulse

Add all sound off button to GUI

Add more tests

http://doomwiki.org/wiki/OPL_emulation

Source and target freq and q can be given and for those the coefficients are calculated. The values in between are linearly interpolated

• osc - waveshape
• dcf - freq response - could be done via fftw3
• env - ahdsr curve
• lfo - waveshape

• Virtual (VA, PD, EL)
• Noise
• Additive

Add lv2:portProperty lv2:integer for integer style ports

In addition to linear envelopes exponential curves should be supported

e.g.

• http://www.kvraudio.com/forum/viewtopic.php?t=104976&postdays=0&postorder=asc&start=15
• http://www.kvraudio.com/forum/viewtopic.php?p=2275738
• http://werner.yellowcouch.org/Papers/fastenv12/

UI port changes are not submitted to plugin

saw, square and impulse prototypes available

• amount of partials needs to be controlled better
• output scaling needs to be controlled better

Efficient Chebyshev based AS synthesis http://www.kvraudio.com/forum/printview.php?t=70372&start=0

Two level menu for modulation target

Voice doesn't go into release mode when on is retriggered.