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Posts posted by Noise-Generator

  1. No big deal. It's the same thing with all the stereo SIDs. You need to connect J14 of the second SID module of a Core to the additional input of the SID. I show you but you need to figure it out for the mb 6582.

    I don't have on, already, if I had one I would describe this more precise but this is how it should work. 


    For FM I don't even have found a program for the C64. There is a demo out there which plays FM but no editor.

    I don't know how much possibilities you have to edit some FM, if you can, you will not see it correctly. So if you turn a knob it is possible that there are changes in sound but not the correct describtion in the lcd. I'm sure the FM engine is close to the SID, like same parameters for ADSR and stuff. However it is also very lack documentated and by saying that, I mean no documentation.

  2. Don't try to get an El Cheapo, try to get a good one, cheap :)

    Best one:

    You can also ask in the fleamarket for this thing (gm5 midi module) 

    You can build a 5x5 Midi Interface with that module or you just can built it inside/beside your sammich to just connect an USB cable

    Check out this ucapps page for further Information

  3. I don't understand you correctly.

    You need the capacitors for the filter, too, if you use a swinsid, if you mean this with capacitor.

    Yes you need to choose the same SID type

    Voltage doesn't matter for a swinsid, as far as I know you don't even need more than 5v


  4. The dio matrix is a combination of din (input = knobs, encoders) and dout (output = leds)

    With the filebrowser in mios32 you can browse into your sd and edit the ngc

  5. You're right. Than this is because Swinsid includes some more Waveforms, did not know that.

    Yes this is a great project and yes if you mean with mod to modify the code, of course because you can also program more waveforms into the free sid. 

    The cool thing about an emulated sid is that you can make it bigger, better and whatever but this also means to add program lines inside the menu. But, at the moment, this project is just announced. The first batch of pcbs are ordered and will be send to everybody which ordered one and than the alpha software will be created. It is also possible that the pcb will get an update and be sure that there will be a new batch in a month or 6 weeks, maybe...

    1 person likes this

  6. Hi Darryl,

    No mods needed. Stereo will work like the fpgasid, so you just need to use one slot and connect one cable from the core

    12 hours ago, dwestbury said:

    This project has some real potential. It will be important to see how compatible these chips will be with MIDIBox.
    I know there’s special MIOS code for SwimSID. Wonder if any mods will be needed to use this board?

    Thanks for sharing @Noise-Generator!


    Special MIOS Code? Are you sure? I know that there is a special SwinSID firmware for better filters with the swinsid...

    You just need a top pcb (not sure if it's possible to build at a breadboard, it's no magic but maybe in case of lack of space) for a teensy 4 and the code which is in development. I've got an eye at this project and keep this thread up to date for news and if there a new pcb orders.

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  7. Great news, a guy called Matthias in the german C64 Forum started a project for a DIY SID based at a Teensy 4 and released prototype PCBs.

    If this will be succesfull (they do a lot of succesfull projects) it will be possible to build and flash an emulated SID and also new Oscillator Waveforms, Filter models or whatever.


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  8. Ok, this is a question.

    You have 1 7809 v regulator and 1 7812 (12v for 6581) by using the jumper you choose.

    You always should measure your voltage after soldering your pcb (and test the jumper), so than you are save. 

    However, I recommend using a SwinSID if you are a Beginner or want to be on the really save side and protect your SIDs as long as you are in the soldering/building/testing progress. And care about the advice I gave you about 6581, they are old, they are rare. It's better to use just 2 or 1 instead of them all because they are old and rare and they are kind of fragile now.

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  9. The only problem I see is that the mb6582 software for the Master Core is by default programmed for the 8580.

    This is not a big deal, it works but it would be better to have 8580 chips or the 6581 software (which doesn't exists)


    a) Recompiling is also not very hard but you need someone who could do that or you learn it and do it by yourself.

    b) You could use the setup6581.hex instead of the setup mb6582.hex

    c) Are you sure all of the 6581 work? Sell or keep your 6581. Using all of them is not very clever because they die sooner as the 8580 and they become rare.

    They sound unique and do have their oportunities but an 8580 is more precise and the filter has more potential.

  10. 12 hours ago, Fab said:

    This is beyond my abilities though (there’s a reason I went for the sammichSID over a ground up midi box), so I was coming here to see if anyone had any ideas on how to implement this. 

    You mean implementing the software?

    * You will need some control software as part of the MidiBox software to 
    change the FPGASID settings (switching between 8580 and 6581 mode etc) 
    in case you whish to do so.


    I think it's possible that somebody could implement some code to switch the fpgasid from 8580 to 6581 with the Midibox


    Each SID Version needs different Filter Caps and a different Filter table provided by the firmware. Building a code which would change the Filter table, maybe possible (if there is space left in the PIC), but you also must change the Filter Caps by opening the box or maybe build an extra analog circuit for the Caps which than need a switch.

    You also need to know, the sammich is a stereo SID solution, both SIDs are handled like the same (2x8580 or 2x6581)

    It´ s more complicated than it seems, unfortunately.


  11. Offtopic

    On 21.5.2020 at 1:59 PM, the_duckchild said:

    Just been updating my website a bit with some words and pictures about various making projects... maybe this will be inspiration? I only really started soldering things in late 2016, so totally possible to do this thing


     (you can teach an old dog new tricks it turns out)

    I bought the gameboy amp, too and wanted to built in but it is just for amplifying the speaker, not the phone output, right?


  12. On 20.5.2020 at 6:56 AM, synthmania said:

    Also as side note; using 6581, the manual warns about leakage of the sound after pressing a key; how bad is it? Is there a way to solve it? Because if I am recording audio that has leakage and background sound, I can't really do much to fix it (I can fix background noise with the audio tools available these days, but I don't think that will work for actual persistent audio that leak. I won't know until I actually build either solution so I want to be prepared about it

    Use a noise gate effect plugin.

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