- 2015-08-11 ISGK Instruments
- https://github.com/risgk/digital-synth-vra8-m
- Monophonic Synthesizer (MIDI Sound Module) for Arduino Uno
- Sketch for Arduino Uno
- Serial MIDI In (38400 bps), PWM Audio Out (Pin 6), PWM Rate: 62500 Hz
- Sampling Rate: 15625 Hz, Bit Depth: 8 bits
- VCF Type (Attenuation Slope): LPF (-12 dB/oct)
- Recommending Hairless MIDI<->Serial Bridge to connect PC
- Files
DigitalSynthVRA8M/DigitalSynthVRA8M.inois for Arduino UnoMakeSampleWavFile.ccis for Debugging on PC,make-sample-wav-file-cc.batmakes a sample WAV file- Requiring GCC (G++) or other
- Parameter Editor (MIDI Controller) for VRA8-M, Web App
- We recommend Google Chrome, which implements Web MIDI API
- Recommending loopMIDI (virtual loopback MIDI cable) to connect VRA8-M
- CAUTION: Click sounds occur sometimes when you change the controllers
- Software Synthesizer for Windows, Faithful Simulator of VRA8-M
- Sampling Rate: 15625 Hz, Bit Depth: 8 bits
- Requiring Ruby (JRuby), UniMIDI, and win32-sound
jgem install unimidijgem install win32-sound- CAUTION: Following operations (with CRuby) also may be required to install these
gem install unimidigem install win32-sound
- Usage
start-var8-m-rb.batstarts VRA8-M Ruby Editionmake-sample-wav-file-rb.batmakes a sample WAV file
- Known Issues
- VRA8-M Ruby Edition spends the full power of 2 CPU cores...
+-----------------------+---------------+---------------+---------------+---------------+
| Controller | Value 0 | Value 64 | Value 127 | Default |
+-----------------------+---------------+---------------+---------------+---------------+
| LFO Rate | 0.48 Hz | 8.1 Hz | 15.5 Hz | 0 |
| LFO Rate EG Amt | 0% | 50% | 99.2% | 0 |
| LFO Level EG Coef | 0% | 49.6% | 100% | 127 |
+-----------------------+---------------+---------------+---------------+---------------+
| VCO Color LFO Amt | 0% | 50% | 99.2% | 64 |
| VCO Mix (Pulse/Saw) | Pulse 100% | Pulse 50.4% | Pulse 0% | 0 |
| | Saw 0% | Saw 49.6% | Saw 100% | |
| VCO Mix EG Amt | 0% | 50% | 99.2% | 127 |
| VCO Pulse Width | 50% | 25% | 0.4% | 0 |
| VCO Saw Shift | 0% | 25% | 49.6% | 64 |
| VCO Portamento | 0.0 s/Oct | 0.13 s/Oct | 1.0 s/Oct | 64 |
+-----------------------+---------------+---------------+---------------+---------------+
| VCF Cutoff | 0.22 kHz | 1.2 kHz | 7.0 kHz | 0 |
| VCF Cutoff EG Amt | 0% | 50% | 99.2% | 127 |
| VCF Resonance | Q = 0.7 | Q = 2.0 | Q = 5.6 | 64 |
+-----------------------+---------------+---------------+---------------+---------------+
| VCA Gain | 0% | 50% | 99.2% | 127 |
+-----------------------+---------------+---------------+---------------+---------------+
| EG Attack | 4.2 ms | 0.14 s | 4.2 s | 32 |
| EG Decay/Release | 10.0 ms | 0.33 s | 10.0 s | 96 |
| EG Sustain | 0% | 50% | 99.2% | 127 |
+-----------------------+---------------+---------------+---------------+---------------+
+---------------+---------------+---------------+---------------+
| CC #16 | CC #17 | CC #18 | CC #19 |
| LFO Rate | VCO Color | VCO Mix | VCF Cutoff |
| EG Amt | LFO Amt | EG Amt | EG Amt |
+---------------+---------------+---------------+---------------+
| CC #20 | CC #21 | CC #22 | CC #23 |
| VCF Resonance | EG Attack | EG Decay/ | EG Sustain |
| | | Release | |
+---------------+---------------+---------------+---------------+
[Monophonic Synthesizer] Date: 2015-08-11
Model Digital Synth VRA8-M MIDI Implementation Chart Version: 1.1.0
+-------------------------------+---------------+---------------+-----------------------+
| Function... | Transmitted | Recognized | Remarks |
+-------------------------------+---------------+---------------+-----------------------+
| Basic Default | x | 1 | |
| Channel Changed | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| Mode Default | x | Mode 4 (M=1) | |
| Messages | x | x | |
| Altered | ************* | | |
+-------------------------------+---------------+---------------+-----------------------+
| Note | x | 0-127 | |
| Number : True Voice | ************* | 24-84 | |
+-------------------------------+---------------+---------------+-----------------------+
| Velocity Note ON | x | x | |
| Note OFF | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| After Key's | x | x | |
| Touch Ch's | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| Pitch Bend | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| Control 16 | x | o | LFO Rate EG Amt |
| Change 17 | x | o | VCO Color LFO Amt |
| 18 | x | o | VCO Mix EG Amt |
| 19 | x | o | VCF Cutoff EG Amt |
| 20 | x | o | VCF Resonance |
| 21 | x | o | EG Attack |
| 22 | x | o | EG Decay/Release |
| 23 | x | o | EG Sustain |
| 24 | x | o | LFO Rate |
| 25 | x | o | LFO Level EG Coef |
| 26 | x | o | VCO Mix (Pulse/Saw) |
| 27 | x | o | VCF Cutoff |
| 28 | x | o | VCO Pulse Width |
| 29 | x | o | VCO Saw Shift |
| 30 | x | o | VCO Portamento |
| 31 | x | o | VCO Gain |
+-------------------------------+---------------+---------------+-----------------------+
| Program | x | x | |
| Change : True # | ************* | | |
+-------------------------------+---------------+---------------+-----------------------+
| System Exclusive | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| System : Song Pos | x | x | |
| Common : Song Sel | x | x | |
| : Tune | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| System : Clock | x | x | |
| Real Time : Commands | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| Aux : Local ON/OFF | x | x | |
| Messages : All Notes OFF | x | o | |
| : Active Sense | x | x | |
| : Reset | x | x | |
+-------------------------------+---------------+---------------+-----------------------+
| Notes | |
| | |
+-------------------------------+-------------------------------------------------------+
Mode 1: Omni On, Poly Mode 2: Omni On, Mono o: Yes
Mode 3: Omni Off, Poly Mode 4: Omni Off, Mono x: No