clem!

Hallo zusammen, ich bin irgendwie gerade auf dem Spartripp (wegen Urlaub und so). Sind DDR Potentiometer Sortimente die in der Bucht angeboten werden brauchbar? Oder sollte man, weil u.U. 20 alt und rostig, die Finger davon lassen. Ich würd gerne einen Sid mit Tastatur und 30-40 Potentiometern bauen, in der Art alter Analogsynths. Wenn ich neue Potis mit Metallachse kaufe werde ich allein für das Frontpanel ohne Panel 100 Euro los. Schöne Grüße clem!

Hi Gioxannes, fine to see that someone else is actually trying to integrate a keyboard. I´m still working on my mb64-based-keyboardcontroller-mb-project - searching for nice knobs and a concept for the controllers. But I´m planning, since I bought 3 sids a mb-sid-keyboard, eventually integrated into this keyboard. Does your keyboard have a dynamic-scan-matrix, an on/off-scan matrix or is it without electronics - and how will you solve the connection to your midibox Best regards clem!

Hi, eventually the sid walkthrough at ucapps could help. Best regards clem! -seems I was to slow

Thanks for the reply - not so much people interested here in Direct-Music-Application and Handiwork. Ok - I´ve done some soldering work with another slaughterd böhm-manual. This is just a prototyoe - quick and dirty  - shouldn´t win a beauty contest, the inverter is still missing but the contacts work here are some pics: I will test at the weekend. Best Regards

Ok - it seems as if I have, free to the german expression "Versuch macht klug" (trial makes wise), to build a scanmatrix-board as shown in schematic. Best regards clem!

hi there, at the weekensd I had a little time to push the project forward. Now I have the metal part for the top, but it needs some drilling and milling and some black colour. Before I can do it I need some good looking buttons and knobs and a red inverse display. But I have the idea to connect the keys of the keybed directly to the core. I´ve studied the posts of qbas. But my keybed has no scanmatrix but 2 "Sammelschienen", "Ruhekontakt" and "Arbeitskontakt" and I thought of rearranging them, that they work like a fatar scanmatrix. I will cut it in parts of 8 notes one of these can be seen in the schematic. Will this work? I´m not that firm in electronics can s.o. check this? Best regards clem!

uups - think I need a bit more study before trying to help :(

hi, I´m not a specialist but but I have some ideas: did you change the code? is it like a midi on? is it always the same note? - try to log the midi stream and separate the event(s) sounds as if there is a problem with the adressbus - perhaps it helps to press the ICs into sockets or to resolder some pins. Good luck

if you aren´t that handy with a carving knife, what about these: http://www.hps-woodpicks.de/9.html

hi, hope you will use some self graved wooden knobs ;) reminds me a little bit of my midibockswurst Best regards clem!

Hallo, hast du vielleicht schlechte Lötstellen oder Kontaktprobleme am IC? Ich hatte einen Wackelkontakt/Kurzschluss am LCD welcher ganz eigenartige Effekte verursachte. Schöne Grüße clem!

Little search brought this: The Aftertouch problem is solved at http://www.doepfer.de/service/LMK3V2_Service.pdf at page 11, a schematic can be found at page 16. Sorry the manual is german only but the schematic is universal :) best regards

that´s a really interesting found ;) thx the axis-keybed reminds me to modern cherry-keyboards - maybe I will slaughter one and pimp it with hexagonal bricks from a board-game. At first I won´t need any velocity-sensitivity.

Hi all, where can I buy hexagonal switches? As seen here: Best regards clem!

hi all, meanwhile I´ve made a bottom for my housing out of steel 0,75 mm (pictures will follow) and can begin to place the electronics inside. Perhaps I will change the wingman-wheels to more professional ones from fatar. For the top I will choose a modular concept with min. 5 panel elements first one will be a main control panel for the midibox with LCD, some switches and 1 or 2 encoders, which will be placed in the middle, and second one will be a controller-knobs-panel with 4 pots and 4 switches, (maybe later expanded with another LCD and more pots and switches, the rest will be reserved for later adds ;) When I thougt about controllers I got the idea that I would like to build an aftertouch-sensor. In an old manual for the lmk3 from doepfer I found that in the early days they´ve done it with piezos. Is it possible to connect a piezo to the ain and regulate it with a L7805 to 5V? http://www.datasheetcatalog.org/datasheets/270/9138_DS.pdf Who has done s.t. similar? Best regards clem!

Good idea! ... there must be ... somewhere ... a broken toaster of course it´s thin, but if we fix it on a plastic strip it must work - I hope so - if not we need a wire with a bigger diameter made of other material.clem!

hi and thx for the quick respond, Yes I´ve seen that, but it has a to low resistance. For our aim, building wire-controlers, we need a diameter of 0,01 mm with a resistance of 11580 Ohm. I think with this wire we can also build shorter controlers of 30 or 15 cm - hope they won´t get to hot 8) Regards

Mmh there´s s.t. better I think: Isa Chrom 60 http://www.isabellenhuette.de/pdf/WIDER_LEG/DE/ISA-CHROM.pdf at D=0,011 mm seems to be ideal for an 85 cm Wire-Controler another one is Isaohm http://www.isabellenhuette.de/pdf/WIDER_LEG/ISAOHM-ISABELLENHUETTE-R.pdf at D=0,01 but where can I buy it as an end-user ???

hi there, interesting video. Are there some infos about the making of this controlribbon. I have googled a little bit about "konstantan" and found this: http://www.spulen.com/shop/product_info.php?products_id=543 Who has sampled experience with resistor-wire-controlers. Best regards clem!

Hi, of course, I had to ate the Bockwurst in a Linseneintopf but not alone. It was very good. I needed a housing for the coding work for my keyboard - and this was the cheapest way to get a shielded housing. :D When I built it I thought a short moment about combining a can with a tape sensor to some guitar like controller. Happy Easter clem! controller.GIF controller.GIF

Pretty nice work! What´s about your code, is it still ready? I´m interested in some input for filtering especially in how to solve the menue-structure for the user´s interface in my keyboard midification project. Best regards clem!

Hi all, my keyboard project needs a little more metal and coding work. Meanwhile I put some hardware into a low budget case ;-). It consists of: 1 core-module 1 din-module 3 Pots 2 Buttons 1 encoder 1 16x2 LCD Here are some pictures:

Some ideas about making microtuning possible on nearly every midi instrument with more than 7 voices/parts that can be triggered on different Midi-channels. If we want to realize this, we must use the Pitchbend on the different Midi-channels. So at first we need to make the Midi-configuration at our sound module for all the eight channels equal. How to build the program-routine? At first we need 12 Bytes “MIDI-Note-Finepitch-VALUE1-12†, for the twelve different notes we want to detune, where we can store our finepitch-value from -63 to 64 or 0-127 and we need a place to save the information whether this note is in use at the moment and if on which midi channel this is happening and how much events there are “Number-Of-Notes-Active1-12â€. So we need another 12 Bytes to store this upper 4 Bits=Channel lower ones=Activity. And at least we need 8 stores where we can place the information whether a Midi-Channel is in use or not. This means another Byte where we store this bitwise called “Midi-Active-Channelsâ€. I´m not firm in programming so we need someone with assembler- know-how to program this but I try to explain my thoughts: if Midi-Input-Event=Note-ON on channel x fetch the Finepitch-Value of this note if Finepitch-Value is still in use send Midi-Output-Event on the used Channel encrement Number-Of-Notes-Active else find free Midi-Channel send Finepitch-Value as Pitchbend set Bit at Midi-Active-Channels encrement Number-Of-Notes-Active send Midi-Output-Event on this channel endif if Midi-Input-Event=Note-OFF or ON with Velocity=0 on channel x fetch the Finepitch-Value of this note fetch the channel send Midi-Output-Event on the used Channel decrement Number-Of-Notes-Active if Number-Of-Note-Active=0 unset Bit at Midi-Active-Channels endif endif other events or controllers must be duplicated or filtered for the different channels eventually there could be timing problems I think

Hi stryd_1, yes it is sys ex, I´ve pasted a bad extract, here is the upper part of page 50 ;):

Hi, sorry it is Note on/off with fraction. Users-manual page 50. Here´s a scan