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About skunks

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    MIDIbox Newbie

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  1. I’ve recently built quad-SID setup without control surface (2 core modules + 4 SID modules) to use warm and dirty sound of old 6581 SIDs. Could you please suggest some strategies for working with multi core MB SID setup without a control surface? I know some of you guys build such machines - they can be seen in gallery and here is a project by Flexinoodle's and nILS in wiki http://wiki.midibox.org/doku.php?id=fnp-sid So, I faced several challenges I have not overcome yet: CTRL panel vs MBSIDV2_Editor_v0_5 HawkEye suggested using virtual machine with Windows XP in ord
  2. I'm running recommended Ctrlr_ac6a3185.exe on Windows (it is now available from archive.org only). Selection SID1 - SID4 does not work correctly. Only SID1 selection produces expected results. E.g., I activate ENS tab. I can receive and modify patch # etc. for first core. When I switch cores (SID2-SID4), information seams to be received correctly, but when I modify any knob (e.g. patch#), it does not get stored to ENS buffer. The only condition under which it get stored, as I noticed, is when that particular SID core I've selected in CTRLR is selected on control surface also.
  3. I suspected it is so :-) I also looked through a soviet electronic accordion Estradin schematic. It has 12 tone generators heavily stuffed with logic elements.
  4. I don't quite understand the theory behind this. Maybe someone could advice me an article or explain briefly. Why most of analog oscillators are very sensitive to temperature and tuning them is a real challenge while SID is not?
  5. I used Arctic Silver Adhesive previously. It worked fine, but it is very strong glue, so once glued, heatsinks will be coupled with SIDs forever. I think it's a disadvantage, if one day you wish to sell your SIDs (at least a pictures of them could be taken before gluing). Using semi-permanent akasa tape seams to be a better idea. Maybe it is not as much thermically conductive, but many people run SIDs without heatsinks at all and do not care.
  6. You can buy this not so expensive thing http://www.ebay.com/itm/182178120435?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT And split it into 4 peaces, if you have a dremel tool or something.
  7. jaytee, you seem to be right. During my experiments I've discovered that chaining SIDs is more interesting that any of above mentioned applications of AUDIO IN. Also, balancing output impedances of SID and audio interface is not the challenge I'd like to accept. I have to disconnect matrix and other leds (not possible for people who soldered base board to control surface directly) in order to have external audio in passing through SID filter without loud hum caused by LEDs switching (mine are bright, maybe that's the case). Wiring (or cross-wiring) SIDs' outputs to inputs does not pr
  8. So, I tried my idea with 10k resistor on SID's output also. I must admit that output from my audio interface comes from SID very attenuated, especially when it passes through filter (EXT IN is on). Feedback on SID doesn't sound that good (self-oscillating) with that extra 10k resistor also.
  9. MIOS does not check for full transition cycle completion, it reacts on each edge regardless if there was a full turn or not. However the question remains. Meanwhile I'm trying to find manual mode for each encoder. But I suspect I'll have to replace some of them anyway :-( Or maybe set all to MIOS_ENC_MODE_NON_DETENTED and reduce their speed.
  10. Thank you, guys. It's strange for me to think something wrong is with the quality of my Alphas. Maybe something with electronics? Yesterday I noticed one strange thing: I set DEFAULT_TESTMODE_ENC_SPEED to 1 and uploaded the application. So I started to experiment with NORMAL speed mode. Mode of all encoders was set to MIOS_ENC_MODE_DETENTED4 (0xa5), that means that the same edges triggers DEC and INC (according to diagram found in mios.h) I took a piece of wire, pressed one end to encoder's ground leg and started touching encoder's D0 leg with the other end. Touching and releas
  11. jaytee, that's great your Bourns encoders work good. Have you removed detents? So, you never-ever have noticed them jumping back, right?
  12. I'd like to experiment with SID filter supplied by my audio interface output to SID's audio input. I'd like feedback pot to remain because it gives extended possibilities bringing SID filter resonating capabilities to another level :-) So, I thought I could connect my audio interface output to the middle pin of the pot (the wiper) through 10k resistor in series. Like passive mixer schematics, but no additional resistor on SIDs output, because here no-fi managed to connect output buffers of 4 SIDs without any resistors at all. Is it a good idea, or, when feedback pot is fully clockwi
  13. Theoretically you are right, in newer MIOS8 versions we can select any combination of pulses that MIOS should react to. However, my menu (still detented) encoder works flawlessly IN ALL MODES comparing to other non-detented encoders, especially some of them. Non-detented encoders have to be set to MIOS_ENC_MODE_NON_DETENTED in order to work more or less evenly. This was my strange experience. Of course, in some modes detented menu encoder works with some multiplier (like 2x, 4x), but anyway without unpredictable jumping back and forth. Exactly these modes give me ability to adjust v
  14. Yep, but I wouldn't call it "stepping" in a standard way, because of the nature of described bug - it has audible consequences only when it occurs (i.e. value jumps). What about Alpha - they have to be good encoders, HawkEye recommended them here
  15. Hello guys! Finally I reached my hands to try to fix jumping behavior of non-detented encoders on my MB-6582. Wilba says that only one (menu) encoder has to be left detented in his CS construction guide. I'm curious then why ALL 15 encoders are assigned as MIOS_ENC_MODE_DETENTED3 in setup_mb6582.asm by default ? Were MIOS_ENC_MODE_DETENTED* modes designed only for detented encoders? As for my non-detented ALPHA encoders MIOS_ENC_MODE_NON_DETENTED works best. However, not perfect (it's more noticeable on large range values like cutoff): even if I move encoder very slowly, sometim
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