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Shuriken

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Posts posted by Shuriken

  4. Put Waveblaster daughter board (Yamaha DB50XG) in a box?

    in Design Concepts

    Posted · Edited by Shuriken

    Hi, I have made an adapter board to use Nec XR385 (db60xg clone) as standalone and agter some attempts I could ear good sound from this daughter board.

    Reading on the web and looking at card i've seen that there is an A/D converter on it (AK4510) and pin 12 - 16 are used by circuit.

    I've tried to connect directly an audio input to these pin and to enable A/D chip by sysex command F0 43 10 49 01 00 00 01 F7 (enable) and F0 43 10 4C 10 01 0B 64 F7 (volume up) but don't works.

    After I've found a scheme of an old commercial adapter that use an op-amp (icl7621) like scheme in enclose pdf, it's right?

    Is there anyone that have connected - and eared a Line/Mic input from that card?

    Thanks at all, Mike.

    I have only come across the same info as you found. I assume you have been reading this topic

    But according to the datasheet of the used codec, a opamp isn't required.

    The line in schematic looks like:

           0.47u  470

Input >--||---^^^----|----*codec

                     |

                2.2n =

                     |

                    GND

  5. SDcard Types?

    in Parts Questions

    Posted

    It's not a big mystery.

    There are just two defining features: Size and Speed

    I think the size part is pretty obvious. As for the speed:

    The following are the ratings of some currently available cards:

    * Class 2: 16 Mbit/s (2 MB/s)

    * Class 4: 32 Mbit/s (4 MB/s)

    * Class 6: 48 Mbit/s (6 MB/s)

    * Class 10: 80 Mbit/s (10 MB/s)

    The highspeed ones are used in camera's where speed really matters. These are a bit more expensive. The Class 2 and 4 ones are similarly priced. So either of those should do the trick as i don't think speed is a big issue in this case. For size you will probably do fine with a 1 GB one. I don't think you can buy much smaller ones these days.

  7. MBHP_ETH, MBHP_SDCARD, SSM2044, SSM2164 PCB Bulk Order

    in Bulk Orders

    Posted

    I kinda want to order my parts so i am able to start. I haven't found any partlist for the SSM2164 VCA yet. I guess Seppoman hasn't come round to it yet. So far i deducted from the photo's the following:

    P1,P2,P3,P4 - PV36W - 10K Precision Trimmer

    IC1 - SSM2164

    IC2,IC3 - TL074CN OpAmp

    IC Socket - 2x 14

    IC Socket - 1x 16

    Single Header 3 Pin x 5

    Double Header 8 Pin x 1

  10. Help required!

    in MIDIbox FM

    Posted · Edited by Shuriken

    Yes, first of all it was ill and now its died. :no:

    Plus side is that now I can get on and do some other things whilst I wait for all the bits to arrive and when it does, the CS is there waiting for it.

    It was really good whilst it lasted!

    I see Mike has OPL sets but no sound chips.

    S

    You could try the which is currently underway. I do have a YMF262 which is a pull. But you won't get very far withit without any YAC512.

  11. Core32 power problem

    in Testing/Troubleshooting

    Posted

    We did some more troubleshooting on this Core32, and we found some new things out. First off, all the voltage checks are fine, and we replaced the crystal... which didn't do the trick.

    Next we stuffed J27, and what we got was a solid green LED. This leads me to think that the main Core32 software has crashed. My understanding is that we need a JTAG or a CAN interface, both of which I have very little knowledge of. I am going to do some research when I get some free time, but if anyone has any suggestions I'm all eyes.

    Also, if we do indeed need to burn the Chip again and someone has the proper hardware I'd be very thankful if I could send the Core32 off to you.

    Cheers,

    Grizz

    Have you read this page? http://www.ucapps.de/mios32_bootstrap_experts.html

    There is some links to JTAG Adapters.

  12. Help required!

    in MIDIbox FM

    Posted

    Yes replacing the DAC first makes sense, but guess what I don't have any spares of?

    I'll post in the Fleamarket section too, but if anyone has any spare sets of chips, (think I'll do another one of these anyway) please let me know.

    I do have a spare YMF262 so maybe that will get replaced first, guess its a 50/50 chance.

    Thanks again

    S

    I see you killed you OPL3 board desoldering. I sure know how that feels :whistle:

  13. Newb musings

    in MIDIbox SID

    Posted

    Thanks for the inputs.

    So there seems to be general agreement that the modular approach is the way to go for a newbie, and that it'll be the easiest to fit in the C64 case. I would have thought it'd be the other way around, due to the compact size of the MB-6582 boards.

    The case is of the later generation (1990?), which if I'm not mistaken contains an 8580. So I got some bits to get me started. It irks me that I'm going to murder a perfectly functioning C64, but on the other hand I never use it. It just sits around gathering dust. Still, I apologize to the C64 community... I'm sorry, ok?

    As for the control surface, I can live with only having access to the various parameters via the PC (or the Yamaha RM1Xx) for now, but I do love me some knob twiddlin', so that's a must have in the months to come.

    Open your Commodore up to be sure what type it is. You wont be murdering it...just crippling :whistle: The SID chip is in a socket.

  14. Newb musings

    in MIDIbox SID

    Posted

    1xSID, 1xCORE will give you what you want, but won't easily let you upgrade to MB6582 (well you can use the PIC and the SID chip...but that's it)

    The MB6582 won't fit a C64 case (first model) it might fit the second model but it would be a snug fit.

    I think you should stick with the 1xSID, 1xCORE and gain some experience.

  16. MB6582 PSU

    in MIDIbox SID

    Posted

    As my MB6582 is nearing completion, i need to start building a decent PSU.

    At first i thought about using Northernligthx design but there are some flaws. I spoke to him and he told me his design isn't working well at the moment.

    So i decided to make my own design taking his as inspiration. I want to use a 2 x 12V Transformer:

    mb6582_psu.png

    On another electronics forum i was warned about latch-up. So i want to change the design and add a latchup protection. It's supposed to be done by adding some diodes. But i am not sure how.

    So i would be helped if anybody could tell me how.

  18. flux cleaner

    in Parts Questions

    Posted

    Should work. Its not compatible with certain types of plastic. Those will probably dissolve. Probably not recommended to spray it on switches and pots. But those are usually on the otherside of the pcb.

    99% Isopropyl alcohol will also do the trick.

  20. ASX based MidiBox Synth Project

    in MIDIfication

    Posted · Edited by Shuriken

    At this point the front panel design is something which comes from Hurolola. As it is, it doesn't justify using a Core32. A bunch of knobs can be realized with the use of a Midibox64 as Alexk has so elegantly showed us with his

    I agree that with compromising on all fronts you end up with something that excel at nothing. The controller keyboard i have at the moment has the same problem you mentioned. It has a bunch of knobs, but i can never remember which one is for what :frantics: , especially when trying to control different synths with it.

    My idea was to create a control interface something looking more like the Arturia Origin. Less knobs and more flexible.

    sl_arturia_origin.jpg

    It would be nice though to create something that would appeal to a lot of people. So any input is appreciated.

  21. Midibox PSU

    in Design Concepts

    Posted

    I have a question about the diodes. As the choice for the 1N4008 seems a bit odd to me.

    The 1N4008 is 1A only. Since the current draw is theoratically 3A (7812,7809 and 7805 combined) wouldn't it be more logical to choose the 1N5401 which is rated up to 3A?

  23. ASX based MidiBox Synth Project

    in MIDIfication

    Posted · Edited by Shuriken

    I am OK. Midibox UC is not intuitive/synth oriented enough for me.

    I would rather set back something more inspired by the CreamWare/SonicCore ASB sound modules but merging them alltogether.

    As i said its only the concept. The design isn't to my liking either.

    A few questions I am wondering about merging control:

    - Merge Minimax Osc 3 and other plug-ins LFO 1 ?

    - Merge Prodyssey S&H and LightWave LFO 2 or Free EG ?

    I see 3 types of thing among these plugs:

    - Audio flow control elements: Osc/Mix/Filter/Amp/Pan + FX (Chorus+Delay)

    - "Fixed" control elements including enveloppe generator, LFO and keyboard note

    - "RealTime" control elements including Velocity, AfterTouch, Modulation Wheel

    Here is a wild idea. Consider making a fixed number of controls which are common for all the synths. The variable ones could be the knobs around the display area. The label will be shown in the display as you switch profiles.

    I had a bit of fiddling with the front panel designer. The DOGXL display is just big enough to fit 4 knobs on a side. So 8 knobs or 16 if you also choose to populate bottom en top.

  25. ASX based MidiBox Synth Project

    in MIDIfication

    Posted · Edited by Shuriken

    It would be good to build it for both internal ASX board or external device (more flexible).

    I totally agree. It basically would be a synth control surface. If we make it programmable, people could alter the key/knob bindings for their own needs. As i said in the other topic we are basically taking the concept of the Midibox UC and recreate it for Core32. Hopefully we can improve on the design, which isn't ideal.

    In the meanwhile i started building my Core32 yesterday. But didn't get passed the stage of placing the 12 Mhz Crystal. I found out i forgot to order the two caps required :pinch:

    Update: With a little bit if scavaging i managed to find all the parts.

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