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  1. Hi all, I have the idea of using a ordinary 3 channel dj mixer as a simple controller for Traktror (or similar Dj tool). The concept I have is that I only would like to use the (Cross)fader(s), tone controls, gain, pan, channel Pfl on/of and Master. (Roughly 16 or so knobs/sliders/pots in total), bring all the wiring out of the mixer with, for example a Sub D 25 and have a small box connect to it, which include a AIN and Core module, which in turn goes to a midi interface (or directly to computer by means of USB, depending on the Core) My question is if this could be realized, or will I change the internal circuitry of the mixer in some way by connecting the extra wiring to the pots/sliders/buttons of the mixer? Thanks in advance for any thoughts by any member. Cheers! Tron
  2. After over a year of development, I would like to start documenting my Midibox_NG project in this thread to collect as much information as possible for similar future projects. The idea is to keep all findings, questions and struggles concerning this projects in one thread to keep myself organised and to help future digital/analog synth developers. As the title predicts, the goal of this project is to design and develop an all in one box digitised analog synth, similar to the MiniMoog Voyager. The synth will be controlled solely over midi. An LPC17 with Midibox_NG running acts as the main brain to read digital pots and switches of the control panel, save and recall presets as well as to drive the synth through multiple analog and digital outputs. Analog synth hardware: 1x LFO 2x Modulation Bus 3x VCO incl. waveshapers as well as additional loops for other effects than the waveshapers (documented on: http://www.muffwiggler.com/forum/viewtopic.php?t=108794) 1x Noise generator 1x Ext_In 1x Mixer stage 1x 5Pulser (http://home.comcast.net/~ijfritz/sy_cir8.htm) 1x Ring modulator 1x Phaser effect 2x Moog ladder LP filter (to create a stereo effect through filter cutoff spacing) 1x Moog T904B HP filter (to create a band pass together with one of the LP filters (http://www.freeinfosociety.com/electronics/schemview.php?id=944) 2x ADSR (for filter and volume) 1x Stereo VCA 1x Headphone preamp 1x +/-15V & +5V switching power supply (I learned, that it is much easier to develop circuits with the additional "headroom" of +/-3V in comparison to a +/-12V supply) 1x Power board to generate +/-12V for the AOUT_NG modules as well as +10V clean reference voltage. Resources All the analog circuits are redesigned and relayouted to be uC controllable. They are mainly based on the following modules: - Ninni Bergfors' Moog based bergfotron modules (http://hem.bredband.net/bersyn/) - Original Moog D schematics (http://www.fantasyjackpalance.com/fjp/sound/synth/synthdata/16-moog-minimoog.html) - Original Micromoog schematics (http://www.fantasyjackpalance.com/fjp/sound/synth/synthdata/07-moog-micromoog.html) - Yves Usson's Yusynth (http://yusynth.net/Modular/index_en.html) - René Schmitz's modules (http://www.schmitzbits.de/) - Carsten Toensmann's Moog Modular Clone (http://www.analog-monster.de/mmschemos.html) - Vinnui's Modbus concept (http://vinnui.blogspot.ch/2011/09/concept-of-modulation-bus.html) The original idea was to use the Moog D schematics solely and as many original parts as possible. But after already acquiring many old parts for a reasonable amount of money, I dumped the idea when the last Chinese seller of UA726 remakes went off market. However, I don't regret the decision, as I am very happy with my results so far with more modern parts, which are not nearly as energy hungry as the old stuff. Midibox Hardware: 1x LPC17 core module 1x KS0108 based graphic LCD 1x SD card reader 1x AINSER64 module 1x DIO_MATRIX module 1x DOUT module (own design with partly high power shift registers for switching relays) 4x AOUT_NG modules Development Roadmap (fully implemented, partly done, not touched yet): - HARDWARE Power Board - HARDWARE Midibox modules (excl. DOUT) - HARDWARE VCO & waveshaper board (incl. trimming & tuning) - HARDWARE LP filter - HARDWARE HP filter & filter switching circuit - HARDWARE 5Pulser - HARDWARE Ring Modulator (on the breadboard and PCB layouted) - HARDWARE ADSR (PCB layouted) - HARDWARE DOUT module - HARDWARE control panel pots & switches - HARDWARE Mixer including overdrive LED circuit - HARDWARE VCA & headphone preamp - HARDWARE LFO, MOD BUS, Noise generator circuits and PCB - HARDWARE Casing - HARDWARE Phaser (planned as a seperate module, since not enough AOUTS available) - SOFTWARE Utilising AINSER64 and AOUT_NG at one port () - SOFTWARE Controlling multiple AOUT_NG modules at once () - SOFTWARE VCO octave switch option (thanks TK) - SOFTWARE Multiple rotary switches locking each other out (softwarebug ironed out, thanks again, TK) - SOFTWARE Controlling Digital switching ICs (binary input) by DOUTs (signal switching related topic) - SOFTWARE synth fine tuningrange (+/- 3 semitones, steps as fine as possible) -> solved in the analog section, without midibox assistance - SOFTWARE VCO detuning -> semitone detuning works, free detuning not implemented in MBNG) - SOFTWARE Midibox_NG menu structure -> initial work done - SOFTWARE Preset save and recall - SOFTWARE Midi control of parameters (excl. tone & pitch bend)
  3. Phatline


    From the album: wiki-phatline

    how to get Velocity Sensed Notes out of a real Bongo.... only one idea... if you have better please tell me
  4. CRUMAR 198 (1976) i love that device... i did not learned keyboarding... but with that thing i start it by by doing... i was always a step-setter...so excuse that i dont find "the right notes" > newbee well i have great planes with it. built in my triggermatrix, which is some kind of play help, rythm automatic and so on... better you watch my video to understand.... @ the moment only the upper manual is midified with a Core32, and my program "triggermatrix" on it... the basic idea is: Connect a drummer, or rythm machine via midi to it, the drum trigger -"re-Trigger" the Key-notes which i press, i can deside via a Matrix which drumtrigger triggers which manual... also there are "song parts" to switch between Trigger-Presets, and Roll-Prests...also the gate length can be changed, and random trigger killer is also integrated... and much more... how ever , i want leds duo-colour-leds over each Key to show me the last Keys i have pressed... because, when i press a chord-set, which get repeated via the drum trigger...no it sounds... and sounds... meanwhile i go to the lower manual and play, or do bass pedals, or do reverb or drumsequencing or drumsounding... after a few seconds i have vorgotten which dam chords i pressed on the upper manual... so this is a must, i know how to do that... soldering a few weeks of course... also the leds will show me fittings notes in the circle fifth... and of course the pressed keys are indicated on the lower manual to over all octaves, in order to learn how to play, while i play... a circle of fifth note corection, which shifts the ohter manual when playing the other, and then falling back again...and also automaticly bass folwing is plan... but up to now i am very happy with this upper manual and the midicontroll via bcr2000. i think i will make the UI via designed PCB which i will order then, because i need 2time the same UI i think it is very clever to make that right...... i also want to replace those Registers via Potentiometers aka "Zugriegel"... also i want to add a triggered Lopassfilter for each manual... and much more of course... but enough, now Videos for ears and eyes, and pictures for your eyes and brain - have fun! well i have. Swell pedal via foto resistor and a 24V light pulb! old psu amp and Loudspeaker, i romed amp and Louspeaker and replaced the power supply the new one a "bit oversized"... but that parts i have lying around for 15years!!! (never realized amp project...) spring reverb tank and foot pedals spring reverb magnetic driver removed rythm "engine" "walz tango march, slow rong swing rock genuine, bossa nova, bass-auto and chords will be replaced with a midibox core32 my program "triggermatrix" and real Drummachine!!! in order for that you can cut the whole cable-tree... but then you have to solder the orange and one of the dark green cables 2gether, in order to get the lowest octave from the lower manual to work..... there are 2 dark green cables, you have to take the one that goes to the lower manual to the manual - key spirals.. dout modules 5V and level shifter 15V (BC549)...there are 88 outputs for 44 keys, because, 44 are organ, and 44 are "piano" envelope types...while the piano swell down with the 100uF caps, the organs will be hold... the selfe eteched din modules. din wired, core mounted the shematic to midified that thing: THE 220 Ohm must be replaced via an 10-22K, and the 1K is also not right... i then used a 2K2... but that Transistor get warm and all 44 of them take a current from 0,5A!!!... the powersuplly was not strong enough for that (with the CORE and the LCD in addation...)... but i think that was of cours of dry electroly caps... burned finger caps? no more! video with jamsession is on upload...
  5. Hi, I have just acquired a stripped out rodgers organ + pedalboard which I would like to use for an organ midification project. I have been roaming this forum for about a month, trying to collect the information and wanted to ask if you could give me some advice and make me aware of caveats which I hadn't considered yet. The organ consists of: 2 x 61 key manuals: each in 4*16 diode matrix pedalboard: 2*16 diode matrix 43 stop tabs (SAMS) 31 piston switches 1 swell pedal I think I will need: Control module: LPC17 + LPCxpresso Manuals + pedalboard: DIO matrix board stop tabs + piston switches: 3 * DIN Module SAMS action: 3 * DOUT module (switching to the on state uses one channel, switching to the off state uses another: 2 * 43 channels, are the line drivers rated for enough current?) swell pedal/Pot: should be accomodated by core module Does this look about right? Does one core module support all this. What latency/conversion times would I have to expect. Re latency I read about the midibox kb project which is in development but I'm not sure if this is simply a firmware update or also different hardware or if it is applicable at all to what I want to do. I was thinking of using the manuals in a 16*16 matrix. With both manuals and pedalboard I am at the moment 10*16 but I want the option of extending by a manual in the future and I assume that it is not easily possible to scan in numbers which are not powers of two anyway. I wonder if you could also give me an indication of how much programming I would likely face (something I'm not worried about). In particular the SAMS might be tricky in that I need to control the two lines per channel via one midi signal. On an off-on trigger edge the on coil would need to get engaged for 100-200ms and on an on-off edge the off-coil. Does anyone have experience how easy it is to configure midi out in Hauptwerk anyway ... might be lost cause after all. I would really appreciate your feedback. thanks a lot!
  6. From the album: TekkStar (Tama Techstar Midification)

    12,5h Working time for this crap... but i need this small size...
  7. From the album: TekkStar (Tama Techstar Midification)

    well have mode alot... not all what i want (lack of Switches and Pots...i have to order...)
  8. From the album: TekkStar (Tama Techstar Midification)

    the 8bit memory was to little... so the 32bit must be used... but the standart LPC is way to big for my application... so i build on vectorboard in 12h a small variante...of course some Connectors i removed...but still enough for future updates are on board...
  9. From the album: TekkStar (Tama Techstar Midification)

    yes a fiew mods i want to make... but i need more pots and switches to do that...
  10. From the album: TekkStar (Tama Techstar Midification)

    connected to a korg Electribe Rythm MKII- which acts as Sequencer...
  11. From the album: TekkStar (Tama Techstar Midification)

    wires wires wires... i dont like that sandwitching... but it works...
  12. From the album: TekkStar (Tama Techstar Midification)

    Very long Reverb time... Replace R306 with an 1MOhm Linear Pot then replace the useless "Reverb-time"Pot "VR32" with fixed 2x 47K Resistors (the pot is 100K and u can use it for other mods!!!)
  13. From the album: TekkStar (Tama Techstar Midification)

    The TOM4 Board was to silent, i dont no why, maybe one of this broken Traces... I decidet to overdrive IC7 by paralell soldering a 4K7 resistor to R56 --- if you do other Mods aswell then better take a 5K6, the 4K7 can crackle the IC7 KRRRRR Finallyi used a 6K8, since after much other mods it was to loud...
  14. From the album: TekkStar (Tama Techstar Midification)

    Mono-Mode: if you just need 1 channel, it is a good idea, to remove follwing resistors to reduce Humming(alot): TomModule: Rm ClapModule: R360 Why mono? Maybe you send the main to a mono vcf and vca? thats what i do...and this mode reduce the humming by my machine about half.
  15. From the album: TekkStar (Tama Techstar Midification)

    make place on the analog part (place for encoder and display)
  16. From the album: TekkStar (Tama Techstar Midification)

    plug and play: instead of fixed soldered resistors i solderd "pin-headers" (deutsch: stiftleiste) bevore i use 150Ohm Resistors.
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