chaos_matrix
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| chaos_matrix [2009/12/13 12:29] – jackchaos | chaos_matrix [2016/06/27 20:18] (current) – psykhaze | ||
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| + | ====== Chaos Matrix ====== | ||
| + | |||
| ===== Introduction ===== | ===== Introduction ===== | ||
| + | |||
| Chaos Matrix is a programmer for an Oberheim Matrix 1000 analog synthesizer built by [[http:// | Chaos Matrix is a programmer for an Oberheim Matrix 1000 analog synthesizer built by [[http:// | ||
| It features edit buffer synchronization for visual feedback and inspection of all Matrix 1000 voices parameters, patch compare, patch init, advanced performance options for some parameters as well as containing all 1000 original patch names. Seeing patch names instead of numbers alone, makes it a lot easier to remember your favorites. | It features edit buffer synchronization for visual feedback and inspection of all Matrix 1000 voices parameters, patch compare, patch init, advanced performance options for some parameters as well as containing all 1000 original patch names. Seeing patch names instead of numbers alone, makes it a lot easier to remember your favorites. | ||
| - | Chaos Matrix | + | Chaos Matrix |
| - | Forum announcement here: | + | Forum announcement here: [[http:// |
| - | [[http://www.midibox.org/ | + | |
| [[http:// | [[http:// | ||
| - | [[http:// | + | {{youtube>PJMrMQk5lrk?large}} |
| + | {{youtube> | ||
| + | {{youtube> | ||
| + | === Current Status (updated 20100301) ==== | ||
| + | * Software complete. Beta source code available on [[http:// | ||
| + | * How-To Build document still needs more content | ||
| - | === Current Status | + | ===== Features ===== |
| + | Almost all communication from the Chaos Matrix to the M1000 is made via MIDI system exclusive messages. Non-registered parameter numbers were not implemented in the Matrix 1000 firmware despite what the manual states. Some communication from the M1000 to the Chaos Matrix is necessary however. | ||
| + | |||
| + | === Real-Time Modulation Control === | ||
| + | All button clicks and knob twists on the live panel send sysex voice parameter changes by default. Oscillator 1 and 2 frequency is controlled by rotary encoders to improve tuning accuracy. The rest of the knobs are potentiomenters. The pulse width potentiometers are dual purpose. In one mode, they adjust the pulse width to a fixed duty cycle, in another mode, the same potentiometer adjust the modulation depth of the pulse width controlled by LFO2. These two modes can be toggled by clicking on the pulse waveform button. The sync button cycles through 4 sync modes, LFO waveform buttons cycle through the 7 available waveforms. Oscillator click toggles click on/off as well as enabling the noise waveform. | ||
| + | |||
| + | === Patch Initialization === | ||
| + | Voice parameters can be initialized to a default setting. Voice edit initialization is a good starting point to begin creating a new patch from scratch. The initialized parameters are sent to the M1000 so the display on the Chaos Matrix matches what is heard on the Oberheim. | ||
| + | |||
| + | === Edit Buffer Synchronization === | ||
| + | When selecting a new patch, the edit buffer is requested from the M1000 and processed by the Chaos Matrix, updating the status of all LEDs and parameters in the soft panel. When the edit buffer is received, you can inspect the matrix modulation, ramps and tracking generator parameters for all the patches in the M1000. When you tweak any of the live panel controls, the original value as well as the newly adjusted value is displayed. | ||
| + | This feature requires additional MIDI cables to route the MIDI out of the M1000 back to the MIDI in of the Chaos Matrix. | ||
| + | |||
| + | === Patch Compare === | ||
| + | When editing patches, the patch compare feature lets you compare your current edit to the original patch. | ||
| + | |||
| + | === Saving Voices === | ||
| + | In the edit menu, select the 2nd page and select a patch location | ||
| + | |||
| + | === Voice Names === | ||
| + | The M1000 doesn' | ||
| + | |||
| + | === Enhanced Performance Options === | ||
| + | Due to the M1000 processor lag when adjusting parameters by sysex, the filter frequency control can optionally send continuous controller messages which are then handled by a matrix modulation bus. When this feature is enabled, the first free bus is used to route lever 3 (breath controller) to filter frequency. The frequency knob will then send continuous controller messages on the current MIDI channel. | ||
| - | * The electronics need to be mounted inside the wooden enclosure. | ||
| - | * Rear panel with MIDI & power jacks | ||
| - | * A MIDI merge has to be built, its necessary for the edit buffer sync feature without the need of a PC. | ||
| - | * The encoder setup isn't perfect, I still get occasional skipping. | ||
| - | * Software 99.9% complete. | ||
| Line 43: | Line 68: | ||
| After all my hard work, I didn't want to invest any more money and time on something that was ugly and costly and didn't work as intended. | After all my hard work, I didn't want to invest any more money and time on something that was ugly and costly and didn't work as intended. | ||
| - | For the next few years the prototype sat in my office. Occasionally I would turn it on and play it a while. Eventually I got tired of looking at an incomplete project and decided to give it another shot. This time, sticking to the basics... | + | For the next few years the prototype sat in my office. Occasionally I would turn it on and play it a while. Eventually I got tired of looking at an incomplete project and decided to give it another shot. This time, sticking to the basics... |
| ===== Panel Design ====== | ===== Panel Design ====== | ||
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| [[http:// | [[http:// | ||
| - | The redesign of the panel began with inspiration from a few classic analog synths: The panel to the Oberheim OBX, Roland Jupiter 8 and Jupiter 6. I liked how simple the two rows of controls were laid out on the Jupiter 8 and how easy it was to see the flow of synth parameters. I knew that the Chaos Matrix would have to have no more than two rows of controls and they would have to fit in 24 inches of the "Live Panel" and the rest of the parameters would be menu driven from the "Soft Panel" | + | The redesign of the panel began with inspiration from a few classic analog synths: The panel to the Oberheim OBX, Roland Jupiter 8 and Jupiter 6. I liked how simple the two rows of controls were laid out on the Jupiter 8 and how easy it was to see the flow of synth parameters. I knew that the Chaos Matrix would have to have no more than two rows of controls and they would have to fit in 24 inches of the "Live Panel" and the rest of the parameters would be menu driven from the "Soft Panel". FrontPanel Express file is attached to [[http:// |
| === Live Panel === | === Live Panel === | ||
| Line 73: | Line 98: | ||
| Pulse waveform can be enabled by toggling the pulse button and altering its shape with the " | Pulse waveform can be enabled by toggling the pulse button and altering its shape with the " | ||
| - | DCO2 Click/Noise button is a 3 state button allowing you to enable the noise wave without | + | DCO2 Click/Noise button is a 3 state button allowing you to enable the noise wave without |
| The Sync button toggles the 4 oscillator sync modes. | The Sync button toggles the 4 oscillator sync modes. | ||
| Line 80: | Line 105: | ||
| === Filter Section === | === Filter Section === | ||
| - | The filter to envelope modulation modulates the cutoff frequency to envelope 1 by default when editing preset patches. | + | The filter to envelope modulation modulates the cutoff frequency to envelope 1 by default when editing preset patches. |
| - | If a user patch is initialized, | + | |
| Some of the parameters sent as system exclusive messages causes the Matrix 1000 to hang. If you're playing notes and change some of the parameters, the notes will hold for a brief moment. Most of the hanging is overcome by simply controlling the interval of messages being transmitted over MIDI for each parameter. Most behave fine and the message can be sent at normal speed, but for others, the transmit interval was reduced in order to compensate for the hanging. | Some of the parameters sent as system exclusive messages causes the Matrix 1000 to hang. If you're playing notes and change some of the parameters, the notes will hold for a brief moment. Most of the hanging is overcome by simply controlling the interval of messages being transmitted over MIDI for each parameter. Most behave fine and the message can be sent at normal speed, but for others, the transmit interval was reduced in order to compensate for the hanging. | ||
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| + | ===== How to build a Chaos Matrix ====== | ||
| + | I realize some people may not want to build theirs using the same panel layout, same pots, buttons encoders etc, but I'll document my construction as much as possible so it can be used as a reference for those who want to build their own custom programmers for the Oberheim Matrix 1000. I would categorize the construction difficulty as medium-advanced. | ||
| - | ===== How it Works ===== | + | === Hardware |
| - | Almost all communication from the Chaos Matrix to the M1000 is made via MIDI system exclusive messages. Non-registered parameter numbers were not implemented in the Matrix 1000 firmware despite what the manual states. Some communication | + | * 1 PIC based core with a PIC18F4620 |
| + | * 1 AIN, 1 DIN, 1 DOUT | ||
| + | * MIDI merge. You can build one using the schematics found at ucapps.de. I simply extracted | ||
| + | * 1 [[http:// | ||
| + | * 25 Alpha 10k linear [[http:// | ||
| + | * 3 Bournes detented [[http:// | ||
| + | * 16 [[http:// | ||
| + | * 1 small red LED T1 (.125" Dia) 3mm | ||
| + | * 2 large stripboards (110 x 94mm) [[http:// | ||
| + | * 5 small stripboards (94 x 53mm) [[http:// | ||
| + | * 3 panel mount 5 pin common MIDI jacks from [[http:// | ||
| + | * 1 DC power jack | ||
| + | * 3 24 x 5 1/2 x 3/4 oak boards from local hardware store [[http:// | ||
| + | * 8 L brackets with screws [[http:// | ||
| + | * 2 pieces of trim stock [[http:// | ||
| + | * wood glue | ||
| + | * wood stain | ||
| + | * poly coat for the wood | ||
| + | |||
| - | === Real-Time Modulation Control | + | === Building the Modules |
| - | All button clicks | + | Follow the standard instructions for building the 4 Midibox components |
| - | Optionally you can have the filter cutoff knob send CCs instead of sysex. The sysex is necessary for programming | + | |
| - | When you enable this feature in the filter menu, the first unused matrix modulation bus is used to modulate filter cutoff with lever 3 (breath controller). | + | |
| - | === Patch Initialization === | + | * [[http:// |
| - | Voice parameters can be initialized to a default setting. Voice edit initialization is a good starting point to begin creating | + | * [[http:// |
| + | * [[http:// | ||
| + | * [[http:// | ||
| + | * [[http:// | ||
| + | |||
| + | The control surface components requires VSS and VDD power connections, | ||
| - | === Edit Buffer Synchronization | + | === Front Panel === |
| - | When selecting a new patch, | + | All the pots can be mounted directly on the panel. |
| - | This feature requires additional MIDI cables to route the MIDI out of the M1000 back to the MIDI in of the Chaos Matrix. | + | |
| - | === Patch Compare === | + | AIN PIN wiring |
| - | When making patches, the patch compare feature lets you compare your changes to the original patch. | + | |
| - | === Saving Voices === | + | * 0 LFO1 DEPTH |
| - | In the edit menu, select the 2nd page and select a patch location | + | * 1 LFO1 SPEED |
| + | * 2 UNUSED | ||
| + | * 3 OSC1 WAVE SHAPE | ||
| + | * 4 OSC1 LFO1 MOD | ||
| + | * 5 LFO2 DEPTH | ||
| + | * 6 OSC1 PLSE WIDTH | ||
| + | * 7 LFO2 SPEED | ||
| + | * 8 FREQ -> ENV | ||
| + | * 9 RESONANCE | ||
| + | * 10 OSC2 LFO1 MOD | ||
| + | * 11 OSC2 PLSE WIDTH | ||
| + | * 12 FM -> PRESSURE | ||
| + | * 13 FM AMOUNT | ||
| + | * 14 OSC2 WAVE SHAPE | ||
| + | * 15 FREQUENCY | ||
| + | * 16 FILTER RELEASE | ||
| + | * 17 FILTER SUSTAIN | ||
| + | * 18 ENV ATTACK | ||
| + | * 19 ENV SUSTAIN | ||
| + | * 20 ENV RELEASE | ||
| + | * 21 FILTER ATTACK | ||
| + | * 22 ENV DECAY | ||
| + | * 23 FILTER DECAY | ||
| + | * 24 DETUNE | ||
| + | * 25 OSC1< | ||
| - | === Voice Names === | + | Finally, clamp the remaining unused AIN pins to ground. |
| - | The M1000 doesn' | + | |
| + | The Mountain Switch buttons can be mounted on a small PCB. 2 of its pins are for the button, the other two are for the LED. | ||
| + | |||
| + | DIN pin wiring for buttons and encoders | ||
| + | |||
| + | * 0 LFO2 WAVE | ||
| + | * 1 LFO1 WAVE | ||
| + | * 2 DCO1 ENCODER | ||
| + | * 3 DC01 ENCODER | ||
| + | * 4 OSC SYNC MODE | ||
| + | * 5 DCO1 PULSE | ||
| + | * 6 DCO1 WAVE | ||
| + | * 7 DCO1 CLICK | ||
| + | * 8 DCO2 ENCODER | ||
| + | * 9 DCO2 ENCODER | ||
| + | * 10 EDIT ENCODER | ||
| + | * 11 EDIT ENCODER | ||
| + | * 13 DCO2 CLICK | ||
| + | * 14 DCO2 WAVE | ||
| + | * 15 DCO2 PULSE | ||
| + | * 20 PAGE | ||
| + | * 21 MATRIX MODULATE | ||
| + | * 22 KEYBOARD | ||
| + | * 23 ENVELOPES | ||
| + | * 28 OSCILLATORS | ||
| + | * 29 FILTER | ||
| + | * 30 EDIT | ||
| + | * 31 PATCH SELECT | ||
| + | |||
| + | DOUT pin wiring for buttons | ||
| + | |||
| + | * 0 DCO2 CLICK | ||
| + | * 1 DCO2 WAVE | ||
| + | * 2 DCO2 PULSE | ||
| + | * 4 OSC SYNC MODE | ||
| + | * 5 DCO1 PULSE | ||
| + | * 6 DCO1 WAVE | ||
| + | * 7 DCO1 CLICK | ||
| + | * 8 ENVELOPES | ||
| + | * 9 KEYBOARD | ||
| + | * 10 MATRIX MODULATE | ||
| + | * 11 PAGE | ||
| + | * 16 PATCH SELECT | ||
| + | * 17 EDIT | ||
| + | * 18 OSCILLATORS | ||
| + | * 19 FILTER | ||
| + | * 21 LFO2 WAVE | ||
| + | * 22 LFO1 WAVE | ||
| + | * 23 MIDI ACTIVITY | ||
chaos_matrix.1260707378.txt.gz · Last modified: 2009/12/13 12:29 by jackchaos