README
1Foo YC20
2^^^^^^^^
3
4This is a Faust implementation of a 1969 designed Yamaha combo organ, the YC-20. In addition to the Faust code, it has a Gtkmm UI with Jack audio and midi support. A LV2 instrument plugin is planned but not yet executed.
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6Original YC-20 organs have a touch vibrato control, which is vibrato induced by horizontal movement of the keys. As there very few (almost none) midi keyboards which produce such information, this feature has been left out of the emulation. Instead of the touch vibrato control, the control panel hosts a "realism" switch.
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8The realism switch has four positions like the drawbars. Each position adds a "feature" to the previous position. Thus all three features are enabled at the last position. The positions are:
9off: unrealistic mode
102/4: oscillator detune
113/4: percussion manual bleed
124/4: drawbar bleed
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14Also, unlike the real YC-20, this synthesizer provides additional separate outputs for the bass section and selected main voice. The volume of these outputs is controlled with the same controls as the main mixed output.
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16The balance and brightness controls are in fact continuous controllers even though the ui shows them as having four positions like the other switches.
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18The MIDI implementation does not care about midi channels. As Jack MIDI offers flexible routing, there is little need to filter messages based on midi channel. Please contact the author if this becomes a real problem though.
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20MIDI can be used to play the emulation, but also control the parameters. Here are the supported control changes:
21
22CC control
23---------------
2450 Pitch
257 Master volume
2651 Bass volume
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2812 Vibrato depth
2913 Vibrato speed
30
3114 Bass 16' drawbar (notched)
3215 Bass 8' drawbar (notched)
3323 Bass manual switch ( value < 64 = off, otherwise on)
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352 Section I 16' drawbar (notched)
363 Section I 8' drawbar (notched)
374 Section I 4' drawbar (notched)
385 Section I 2 2/3' drawbar (notched)
396 Section I 2' drawbar (notched)
408 Section I 1 3/5' drawbar (notched)
419 Section I 1' drawbar (notched)
42
4316 Balance between sections I and II
44
4517 Section II brightness
4618 Section II 16' drawbar (notched)
4719 Section II 8' drawbar (notched)
4820 Section II 4' drawbar (notched)
4921 Section II 2' drawbar (notched)
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5122 Percussion drawbar (notched)
52
5352 Realism switch
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56Comments, suggestions, whatever: contact the author:
57
58 Sampo Savolainen <v2 'you know which symbol' iki.fi>
59
60Thanks to a lot of people, especially:
61 Robin Gareus,
62 Petri Junno,
63 Stéphane Letz
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65
66ChangeLog:
67
681.2.1 => 1.3.0 (January 28th 2011)
69 - Graphical user interface for the GUI
70 - OSX VST (Thanks Robin!)
71 - Refactor UI codebase
72
731.2.0 => 1.2.1 (January 21st 2011)
74 - Fix denormals in LV2 and VSTi
75
761.1.0 => 1.2.0 (January 20th 2011)
77 - Windows and OS X releases
78 - LV2
79 - Improved volume control curve
80 - Fixed bug with 4' drawbar bleed
81 - More subtle hover highlights
82 - Switch from gtkmm to straight gtk
83
841.0.0 => 1.1.0 (December 8th 2010)
85 - Optimized band limiting scheme
86 - Vectorized DSP code (built with faust -vec)
87
88
89--------------------------------------------------------------------------
90VST is © 2004, Steinberg Media Technologies, All Rights Reserved
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