[Superdrums 8000 Download
Sharif Garmon
FACT TV visited Raoofi at his studio to see his vast archive of gear with our own eyes, where he guided us through everything from his beloved Roland TR-909 drum machine to the rare Korg DW-8000 synthesizer.
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@CYBERYOGI =CO=Windler - Oh, side note: I know the PT-30/31 aren't related at all to the MT-65 .. I was hoping the chipset from the latter type of model might be available in a PT-sized model, but from a little bit of research, it looks like the answer is No, it's not. There isn't a smaller keyboard that uses that chipset. Too bad.. I think the drums and all the possible unlocked features from the MT-65 would be amazing in a smaller form. I love the feel of the tiny keys and the portability, as I mentioned before. Oh well..
The MT-52 looks especially interesting with the Super Drums feature. I would love to have that functionality on top of the MT-65 stuff. I'm wondering if those MT-52 features can be unlocked on the MT-65/68. That could be really interesting.
The thing that attracts me the most to the PT-30/31 is having all the little chord options on the side with tiny buttons and the sequencer. The transpose option is a great addition too. I want to add that functionality and form factor to the sound quality of the drums and voices of the MT-65. I don't think my dream keyboard exists so I will have to accept the limitations of each model and appreciate them for what they are. Limitations are actually great for creativity in my opinion.
@534Non the subject of the MT65, you know there is a full sized version called 405. Casiotone 405. THAT would be the unit to tinker with. Now since you will now have BOTH the MT65 and the MT68, I would tinker with the MT68. The MT65 for me is nostalgic as it was the first version I played that belonged to my Uncle in Puerto Rico when I was a child. He gave it to me when I turned 19. I rebuilt it so it would be like new. I tend to buy second keyboards of models I like to tinker with. The MT52 is also of nostalgic value to me as my dad bought that for me back in 1988. The chips in it are different from the MT65 but it DOES have tinkering abilities and as such I bought 2 CT320 full sized keyboard versions of this MT52 so I would leave my rare White MT52 intact. Back to the subject of the PT31. Buy a small 2.2kb tuning pot on ebay and put that back. The reset "P" is just a metal hovering over another metal. BUT, if you feel safer to install you can install and normally open push switch and install it on the back of the Casio and when or if the memory needs reset, viola! As for small formfactor Casios that have the same or close type chips as the MT65, there are some rare PT style boombox KX101 which has a polyphonic keyboard that corresponds to a MT model. The VL5 with LCD and calculator buttons is also polyphonic and also corresponds to a MT model which is maybe MT30 or MT31 or M10.? Cyberyogi has more info on these and I indeed found my info from his site.
LOL! We must be of a like minded kindred spirit my good sir! I too would want such a keyboard and have indeed DREAMED of such unusual PT sized Casio keyboards throughout my lifetime since I started playing keys back in 1987! The PT30/MT65/400V keyboard has been in my dreams 2 or 3 times and I always found it in a used music gear shop that does not exist. It is White and is slimmer than the PT30 but wider than the PT20 and as long as the MT65. All of which are WHITE model keyboards lol! Love them white Casios!
Has anyone done an isolated output for each instrument kind of mod yet? Curious to hear how that turned out if anyone has done it. For me, this would be the best thing to do. That arpeggiator would be killer if it could be separated and run through effects like tremolo, delay, long reverb, chorus, etc. The isolated bass would be amazing isolated through a synth bass octave pedal to get a fatter dub sound. Drool..
Microcontrollers of that era had very little internal rom , so Casio had to throw features out to add additional ones. The SuperDrums patterns or ROM-Pack support likely consume enough bytes to kick out the number tables for the synth features, despite the chip core was the same.
I have identified separate sound channels in MT-65 hardware platform (D930G+D931C). On my CT-410V I had to install an additional analogue envelope PCB to retrofit the arpeggio. I hope this doesn't go too off-topic. This chip has nothing to do with PT-30.
The Accompaniment LSI "NEC D930G 011" (80 pin SMD, pins count anticlockwise) is one of the most interesting squarewave accompaniment CPUs ever made by Casio, because although it features only 12 rhythms, it has for each of them 4 chord, 4 bass and 4 arpeggio variants and features wonderful dark and sonorously droning multipulse squarewave bass and chord tones with different pulse patterns. It is 6 note polyphonic (4 chord channels, bass, arpeggio), and all tones have separate output lines (those partly need external envelope capacitors). It features also separate outputs for 7 analogue percussion trigger pulses and a static percussion waveform (2 mixed shift register feedback noises) for snare and hihats. Drums and clave timbre are made from external analogue circuits. The D930G also acts as keyboard matrix decoder for keys, control switches and accompaniment section keys. It contains in its ROM also definitions for main voice preset sounds those it can output through a 4 bit bus to the external main voice sound IC D931C (e.g. in CT-410V); in other instruments (e.g. Casio MT-45) this feature is not used. The keyboard matrix outputs are multiplexed as address bus out in keyboards with additional rom, ram or percussion IC (seen in MT-500 service manual); the data bus has only 4 bit. The "D930G 011" can also be controlled by an external CPU (e.g. D7801G used in Casiotone 7000 or the Symphonytron 8000 accompaniment unit RC-1 - both control also D931C from there instead of connecting it with D930G).
Many unused pins of D930G version "011" (e.g. data bus) have a meaning in other software numbers. E.g. MT-800 ("017") supports a ROM-Pack slot and MT-500 ("022") a sample percussion IC; both also have additional RAM. In the MT-500 4 drumpads are buffered in a latch that is clocked by pin 26 to output its 4 signals to the data bus (pin 65..68). According to its service manual, a 4-input NOR triggers an interrupt at pin 42 when multiple (or any?) drumpads are hit. Pin 73 selects the active nibble of the 8 bit percussion ROM to be read through the 4 bit data bus.
@CYBERYOGI =CO=Windler - Wow, that is super thorough info. Thank you. This will come in handy when I start to look into the possibilities of modding my MT-68 or 65. The 65 just came in today and it looks very good after I cleaned it up a bit. I guess that means the 68 will become a future mod project. That seems to make more sense.
I think I only want to add isolated output jacks on the MT models since I imagine that would be a more simple mod. Having a transpose option would be really great though too, if it's not too complicated. I will have to research that for awhile. I wonder what the best type of part would be for rotating through the levels of transposition so the processor understands clearly. That's a question for later.. I better focus on what I can do for now.
I think my first projects will just be to fix the PT-31 and the MT-400v. I'm just waiting for the 2k trim pot to come in for the PT-31 and I think I will open up the 400v further during my December vacation and continue on that thread again with my findings. Thank you so much for the continued interest. Your responses make this journey a lot more exciting.
The transpose in MT-65 is a digital feature on the CPU. You only have to push a button and press a key to transpose to that note. If I remember well, additionally the "transpose on" switch is needed to activate this mode.
All unknown function names and in/ out numbers in this chart were chosen by me. The input lines are active- low, i.e. react on GND, thus any functions are triggered by a switch in series to a diode from one "in" to one "out" pin.
@CYBERYOGI =CO=Windler - You make it sound like it's possibly a lot easier than I was expecting. I need to put a button somewhere that interacts with the chip to say the transpose function is temporarily "ON" while I press any key other than C and it will move everything relative to that? I wonder how you would activate transpose up vs transpose down though. Hmm.. (I am editing this afterward because I thought about it a bit more)
I understand the concept, but actually physically executing this will take some time to understand I'm sure. I see this as a long term goal but it's nice to know that there's a path to it that doesn't sound too wild or dangerous. I appreciate the info
Oh my friend, worry not about the many extras if you are referring to the MT65/68. Those features are already active on those 2 keyboards . The transpose which is NOT on the MT65/68 would be the only thing from what I see, that you need to worry about. Also, making an interface for the individual outputs for:Bass,Chord,Arpeggios and Base drum,snare drum,claves,congas,hihat short,hihat long. Those are the only things you need to worry about on the MT65/68. The MT400V if you fix it, THAT is another story!! That keyboard is the one you will need to worry about all those MT65 features being activated and since the MT400V does NOT have built in speakers, I reckon you will have some room for those features and the corresponding switches and jacks.
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