Hawkeye

which is highly unlikely, because they are identical - from the silicon chip perspective :-) edit: btw - it is a free market, you may sell them for whatever price you can achieve :smile:

I have the feeling investing in SIDs is better than investing in gold ;-)

Looking great! Thanks for the link and the idea... the transparent acrylic will be a good alternative to very costly aluminum-based panels with hundreds of LED holes - which would also be terrible to mount in conjunction with flat-top LEDs - whoever has a MB6582 with them knows the pain :) Many greets, Peter

FM-based synthesis won´t be able to achieve a "perfect" square wave, as it just layers sine waves of different frequencies, and you´d need a lot of layers/operators to get close to a perfect square wave. It always "overshoots" at the corner points, exactly like in Imp´s posted pictures. Also, agreed to j, a perfect square wave without any postprocessing/fx may sound a bit harsh, it is just unnatural :)

Hi, sounds great! It is by no means pure OPL3? Or is it? Great job! Many greets, Peter

Thanks for your work and time on this :clover: I am already loving the planned support for the LED-Ring Board and the thought of adding a second SRIO chain for even more Blinkenlights :-). Don´t know, if it is too much asked, but maybe we could add a generic framework for synthesizer patch retrieval, modification/storage and push-back? I.e. to program and provide a better UI for the hundreds of available hardware retro synths from the 80s and 90s and 00s :-). Many greets, Peter

Yes, as far as I understood +5% PayPal fees, which is normal. Also great to see, that one goes to TK for free :) That will secure us eternal LED-Ring board support :-D (just kidding) Many greets, Peter

+2 for me! Thx for your recent changes! :) Edit - i just measured space above the synths, and four boards fit in, those will be necessary for the FS1R controller, if it is ever built ;-). Again, many thanks for your work. Will take 4 boards, then :) Many greets, Peter

Thanks! :-) :clover:

Very nice! Thx for adding the encoder switch lines! By having 16 separate lines, it makes the board even more flexible, allowing to query 16 individual encoder switches, if needed. Otherwise, one can "short" them on the 16pin switch connector to get a single "acceleration" line. This design is good, because it reduces the total length of the switch "bus" - being starwired here, instead of using one long bus system with 70cm of trace on a single board... Many greets, Peter

Hi Paul, sorry for the late reply - this is it - see lower right part of the video :) Many greets, Peter

Hi Tim :) If you are willing to improve it, and stock it in shop, I think everyone would profit - but please do not invest too much time or money - maybe nobody, but a few LED fanatics will be interested in this board? :-) Here is a personal wishlist, everyone might disagree, but I still have that wish for a FS1R controller and that synth has more controllable functions than an A380 airbus and thus needs a few encoders :): * If you ask me, I think for normal "MIDIbox" use, it is totally sufficient to have one lit LED per encoder, so the aggregated current consumption should not be so high? We would have only 16 LEDs on permanently, driven by four shift registers, flicker can surely be addressed by hacking the update routine speed, as Duggle said, but it should better be tested before... * 16 LEDs per wheel and a 16x16 LED matrix is a great design choice, as is the 8x2 encoder layout on the board. If you reduce the number of encoders per "modular board", you also have to reduce the LED matrix size and need more shift registers for the same encoder amount... also limiting the maximum encoder amount of the controller (even with good termination). * Regarding space - i´d say as small as possible with through-hole LEDs and common "pushable" encoders, don´t know what is possible with routing... * Shift registers and other components should be on the backside, if possible, so that the frontside is clean and can be used as a surface just as the fine MBSEQV4L, white PCB color preferred :). * SMD components for shift registers and diodes would be fine. * Also, an encoder "push acceleration"-bus would be really nice, if a pushable encoder is pressed down, it should just short the bus, so that a global "FAST" feature can be used - it is really nice for intuitive encoder use... Just two pins to be forwarded to the neighboring boards... Many greets, Peter

:super: <- SmashTV :) Thx a lot :)

Hi Davo, The MIDIbox SID V2 based TwinSID, not to be confused with the SwinSID, has been created by yodabe - more infos here: http://www.midibox.o...p?id=mb-twinsid No group/bulk order has been created for it yet, I´d recommend to also look at the MB6582, it has all the controls you need, you can only populate it with 2 SIDs at first and grow as you can obtain new ones... And the best thing is, SmashTV sells complete PCB and parts kits in his shop in fantastic quality! Many greets, Peter

The transistors cost around 10cents each, so I´d desolder them and ask questions later :D Cut them above the frontside PCB with a wire cutter, then suck through each pin with a vacuum desoldering pump - heating from the backside with your iron while sucking from the frontside :-D. Then, rework the solder points that look a bit messy, make sure your soldering iron has the right temperature and do quick soldering, it should not take more than 2 seconds per solder joint. Being this fast also makes sure, that you don´t accidentally burn your new transistors. What really helps, is a temperature controlled quality iron with a new tip, and good (not lead-free) quality solder. Also, you should get rid of that solder flux, your gfs or co-workers nailpaint remover will help here - there may be micro solder particles hidden below, creating unwanted shorts. Many greets, Peter

Agreed on the popular project built around it, MIDIOv3 should be quite easily customizable to run this board. Mmm, I want one, better two boards :-D. Personally, I see no problem in the "fixed size" of the board. It nicely fits into a 2U case. Also, there is enough space for big encoder knobs. The only thing I would add, would be support for "pushable" encoders, so that you can "push-to-accellerate" input, like seen on the Elektron Machinedrum. Many greets, Peter

+1 for me, it looks great! Thanks for your efforts, and no hurries :) You could ask Tim/SmashTV, if he is willing to put it to his shop, I think many people would be interested in it, who are trying to improve the user interfaces of their old synths :). Also, I´d recommend, if a bulk happens we add one more board for TK, with the cost evenly divided among the people who order. So that he has one in his repository for testing or bling :) Many greets, Peter

Hi there, sounds like a potential problem in the output/amplifier section after the SIDs... can you post unblurred hi-res pictures of your sammich PCBs, with all ICs installed, front and backside? Many greets, Peter

Very nice project :-)

@Orange... hm, my SIDs don´t get hot at all, barely warm, when touching the SID heatsinks through the "fan case opening". But that might be because the MB6582 is mounted in a 45-degree angle and the case was drilled quite a few times in the "bottom" to get fresh air... The warmer air can then naturally flow upwards out through the fan opening...

Hi, after initializing a patch, it is always on its default parameters, don´t worry, you can´t overwrite the "INIT" patch... It sounds like you are initializing a bassline instrument, which explains the long default "sequence" it plays... Try initializing another engine, like the Lead engine... http://www.ucapps.de/midibox_sid_manual.html Many greets, Peter

A typical job for Smithies world-class knob removal tool! :)