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  1. Hello,    Need a new LCD Display 240x64 for Yamaha RS 7000. My know how is not enough, because of that i did not know whicth will be the right replacement part.    I saw many displays that has the right number ob dots (240x64) but i don´t know if i could place everx display inside and it works...   for exampel i saw that parts:   yamaha told me that the part number is: "ET-Number  WC53530R" if that can help....   Any one out there who knows and can help ?   Thx
  2. Hello guys! I'd like to share my experience of connecting Yamaha BC-1 breath controller to Core LPC (using MIDIbox NG application). First of all, I'm sorry but I didn't manage to obtain any AINSER module, so all test are done using onboard ADC.   All 3 BC's are powered with 9V and output values in the upper half, but in a "mirrored" manner: higher voltage in rest and lower voltage when blown into. BTW, one can also suck the air in, then output value goes even higher, but doesn't reach 9v. BC-1 and BC-2 have a diode on their outputs (don't know about BC-3), so a pull-up resistor must be used (without it the output is "hanging": I get a random flow of CC values).   There is a (not so good) option to power BC's with 5V, I saw this approach several times in the Web (e.g. for connecting to expression pedal input of a synth or to some commercial controller similar to sensorizer, e.g. Doepfer WE):   I've found the following page on one forum (without a link to the source, but we may guess it's somehow related to some controller named MIDIBOARD): So after several experiments with different schemes and voltages, I settled on the above scheme. Doepfer WE manual recommends pull-up resistor from 1k to 4k7 (however, for 5V supply). Because above schematics outputs values more then 3.3V, I had to use a simple pot-based voltage divider instead of a pull-up resistor. I calibrated it and everything works fine... almost.   Here was a good part. There is one annoying thing I still trying to get rid of: At first I used 47k pot as a divider. I've got a lot of 127 values in the flow. Even if I do nothing, they are flowing, like: 60, 127, 60, 127, 60, 127, etc. (60 is my value at rest if not adjusting pinrange etc, but simply setting output 0..127 mapped to 0-3.3V). I tried to increase the current by replacing my pot with 1.4k. It helped - now 127 values appeared ~ twice a minute. And finally I replaced my pot with 640 Ohm. Now I get 127 once a minute. So the problem is I cannot eliminate sporadic 127 values completely. And 640 Ohm divider I think is a waste of battery ;)  
  3. Hi there, I know this a is little bit OT and may be not very contemporary: I have bought an old DX7S and thought about building a RAM-Cartridge by myself. Maybe someone here has some experience with this or knows where to find completed eagle files or a pcb to do this. Best regards, clem!
  4. Midibox vs. real piano

    Has anyone tried to use midibox on a real piano?  I know it's a no brainier to wire to solenoids but what about dynamic key response?  I recently acquired an older Yahama with built in pianocorder and wish to replace the host controller with midibox.  It works good as-is but has a 1/2 second delay which is intolerable, you can not hook a remote keyboard to it and play it live.  Newer models allowed this "Feature" to be turned off but mine does not, I have dug deep into the circuits to try to trick it out but it comes down to the firmware in the host controller, the software must be reverse engineered and modified.  My main expertise is hardware and wiring midibox to the existing drivers would be much easier for me but i will loose dynamic response which brings me to the question above.   The drivers require pwm outputs from the host to set the strike pressure, so the velocity of the midi notes needs to be translated and turned to pwm for each pin output.  Has it been done?  I tried a quick search without luck so far.  This feature would also be neat for driving LEDs as you could get variable brightness from them.   Any help would be greatly appreciated, Jmayes
  5. Hi.   I wonder if either (or both) the Yamaha CS50 or SK20 synths could be midified. I'd only be looking for note on/off. I know the CS50 has a MIDI kit already, but that's very expensive and adds a bunch of features I wouldn't necessarily want.    Service manuals are here:   Thanks.
  6. Good day MIDIbox community,   I'm thinking about making a MIDIbox CV for my Yamaha CS-10 synthesizer and I'm wondering if they'll work together. The Yamaha CS-10 uses Hz/V of C1 = 0.25V, C2 = 0.50V, C3 = 1.00V, C4 = 2.00V.. and therefore have different voltages then (for example) the Korg synths. I read in another topic () that there are problems getting the MIDIbox CV to work with these older Yamahas.   Does anyone have experience connecting a Yamaha CS to the MIDI CV? I really like to know if it will work. Or can someone give me some advice to make it work probably? Otherwise I'll go and buy a Kenton Pro Solo but I prefer a DIY solution a lot more because I like to make things. I think the MIDIbox is interesting and a great project to work with!   Another quick question about the MIDIbox CV: If I'll buy a MIDIbox core with a PIC that already includes a bootloader; do I need to buy a burner to write the MIDIbox CV application to the PIC?   Thanks a lot. Cheers, Cesar
  7. New FM only forum.

    Hello FM friends... Here will be new FM Chipmusic only FORUM: Any suggestions, ideas are welcome... SEGA MD PC OPL2/3 NES VRC7 X68000 MSX (MSX-AUDIO, MSX-MUSIC, OPLx) VSTi etc etc PS: For all here are antispam answers... (2#6#1#2,O#P#L#3,V#R#C#7) # - delete Matej