moebius

Hi! I doubt these are relevant for MIOS C programming. The C option is nice to have - more people have programmed C than assembler and some things are just easier in C. I luv assembler - basicly playing directly in the hardware bit, byte level. But it gets damn complex, when working with software like any bigger MB project for MIOS. C code is always bloated when compiled! I say!! (My teacher who TRIED to teach me embedded C programming (AVR uCs) said that current C compilers are advanced enough that it doesn't do any difference) I doubt. TK? Moebius (p.s. When are we in the level of standardization, When we have just a Java applet, where we can create setup for our midiboxes - standard libraries for I/O, UI, ect. - just drawing wires between the software components?)

The both. Moebius

Hi, You can try. It will need a good (as wide as possible, as good mechanical contact as possible) contact because it's the pin carrying power to the chip. Good Luck! M

Hi. You just have bought log. pots. You'll need linear ones. I think you should find those too.. maybe from the same place that you bought the last ones. I wouldn't search for "really good quality" stuff for this but more like something with good enough "touch"/ "feeling". Usage in MB64 isn't really that critical for the quality. Moebius

Hi. Whatever "real" PIN number that was, it's used. Now the thing is, how badly it broke off (can you see any metal contact space there, maybe you could solder directly to that) and which PIN is it really. Moebius

Thank You for Your concern! [sarcasm] Aren't these stombox guys the same peepz who have endless arguments over different 4558s and never care to look at the actual waveform pictures at the scope to see if there's really any difference? Same guys with nice suntan on the summertime? [/sarcasm] UV radiation has been studied long enough to know the harmful effects on different wavelenghts - my leds have such a wavelenght it's not harmful. Period. These days you don't need to KNOW these things, but combine information available from various sources. Moebius p.s. Aww - I'll have to take some words back.. I do have old JRC4558s in my drawer, those DEFINITELY sound the BEST in Tubescreamers, whatever scope shows 8)

Hi. Why don't you go to http:///www.ucapps.de and have a look at MIDIbox64? The Bitstream uses a cheaper pic than MIDIbox, but it's otherwise harder to DIY - You would have to make your own doublesided pcb for it AND the pcb calls for certain type ALPS potentiometer which are rather expensive. And midibox has more configuration options ect. Bye, Moebius

Hi! Man - where did You get those LCDs? Got couple of spare willing to sell? ;D IF the picture is even nearly close to the truth about the looks, these are beauties and would match so called UV leds (more like purple actually) I've got. And for the PCBs being the same - It's probably this China thingy.. as HD44780 and it's clones are standard for the character LCDs, there's a reason to produce million base PCBs that can be used by various manufacturers or maybe these LCD are all chinese origin just branded differently... Moebius

Ah, no problem - Both of You. I think Smash has just the same problem: It's there, somewhere.. ;D I'm have a sort of good situation as I have pretty small storage space - I just have to do tough choices of what to keep, what to dissasemble to parts and what to throw away :D I think I've got a source for the part, but once again money transfers will be a problem or at least something that must be sorted out. Hehee ;) This one will bite ya in da ass.. ;) sorry. Ok, you'll find some treasures and stuff you even didn't remember having. And throw away old junk <- that's the hard part. More than once, I've been sure I've got just what I need.. and in the middle of going thru piles of junk I realize, "Yeah, it went to trash because I thought I'd NEVER really need it".. M

Psstt, SN76*** ;) M

Uh, enklish? German? But hey, this is a great place to Smite the Mighty Smashy.. He hasn't gone thru his stash and found those "noise makers", he very well knows I what I want and need.. damn You! ;D So, waitin' 'till timeout - million smites to Ya Smash! ;D Samppa /edit p.s. Million smites to You gbeth.. I've heard some rumours about You having those chips..

Hi. In this case you don't have to know a thing about PIC ID header, just leave it with zeroes. This will be a working configuration. If you're going to add a display, normal (HD44780 based) displays will work right away! (that means from the software side, not the possible connection problems :)) Moebius

You guys are SOOO lost! (So am I) Just see the link above: http://www.uoguelph.ca/~antoon/gadgets/555/555.html Jeezz.. this is a GOOD spec for an analogue component! :o and as always, You can choose passive components in timing circuit to improve stability, nothing new here :) And about "stability over temperature range" - man, it might be an issue in the industrial environments. For a guy playing a synth this means that you have to turn the tuning knobs when you switch locations from the antarctic to near some volcano. --- First of all - Attila, You have boldly gone where many people have gone before, but all by yourself. Great! But join the SDIY mailing list NOW.. I'm giving you an idea: Use a couple of small 8bit SRAMs. 52256 should be cheap and easily available. Use a binary counter connected to address lines to step over address locations: 16bit data input/output patterns available to sequence your 555s. Connect switches to SRAM data lines and while SRAMs are write enabled (another switch WRITE) step over adresses and use switches to set bit pattern. While SRAM is in read mode use counter to step thru the adresses and the same pattern plays back. Of course, you'll need reset circuit for the counter, pull ups/downs etc. But if You study hard enough, I'm sure you can do it!! Moebius

Hi. Signatures allows using [urls] in 'em. (I had it turned off, but it still shows when viewing profiles) Enough? Moebius

Aww - good analysis Thorsten, actually I didn't even think about THAT! ;) With overall "system" non-linearities I meant things out of scope of the AOUT itself -> things to be controlled. VCFs are usually non-temperature compensated, residual drift being around 3350ppm/C. VCOs with passive temperature compensation (temco resistor) are rather stable, but there's still residual shift coming from the different temperature depencies of the different components. This is usually "good enough" and so is the AOUT_LC. 8) Moebius

Hi. I've been shy to comment on this thread, 'cause it's a well know fact that I don't code :) Yup-ah. You'll find ASCIImatics for both linear and exponential slide/portamento here: http://machines.hyperreal.org/categories/do-it-yourself/schematics/portamento.circuit.2.txt Isn't this basicly the difference between constant time/rate portamento effect? Should be easy to model this with software. [blaablaa] When this schematic is used with portament on/off switching, it's done by shorting "GLIDE" potentiometer. (Simplified) -> No current flows and cap is not charged, but it follows the voltage closely. [/blaablaa] BUT - this weird silvery box with all these strange engineering practices (we so much love) does it differently. Tony Allgood's 303 clone or any 303 schematic will show you how.. http://www.physicsenterprises.andrews.edu/diy_archive/schematics/oakley/images/tb3030-1.gif It's a variation of the exponential slide circuit, but this time the cap creating RC time constant is switched - between input and output of the slide buffer opamp. The buffer isn't just a basic voltage follower but - at least in tony's circuit it has gain of 1,0024 ;) not much, but at least 303 freaks think this is one of the quircks that makes it sound like it does. Each time slide is switched on it starts with voltage after the slide buffer and not with the voltage before the buffer: Small blips each time slide goes on. Bye, Moebius

Sure! Obsessive?! Hell Yeah! Sometimes prejudiced & stubborn, before proven otherwise (see below) *grin* It also could be a mental condition. (I'm referring to myself!! No offense!) ;D Peace, Moebius (P.S. It might have helped the discussion to easier style, If I had received the spare parts for my MC-505 on Friday.. Sick things happen: I was totally against the "Groovebox" concept, when I bought it broken -> just to fix it and resell it. Damn. I tried it out and found out that even with broken LCD I can operate basic functions without looking in the manual. IT STAYS! It's still sorta ugly and presets make me sick - but it suits my workflow. Heh.) P.P.S. Smash - Doesn't discrete metalfoil 1% resistors have 50ppm/C tempco? It's small and unavoidable. See, if DIP resistor network datasheets have tempco specified. Anyway - it shouldn't matter at all, even in the applications needing high accuraty - overall "system" non-linearities will be higher.

You get that message in your head or maybe marked on the paper ;) Read the main.asm. You're testing, if signals from core are actually going to SID socket - manually, by sending different modulation control messages and seeing if PIN voltage goes up.. (read the main asm there's one exception) MEssages on the LCD only show which PIN is selected and you can see those pins in SID module schematics. M

Ah, that would be me! Ease up Smashy - it's just some Friday fun ;) That's a well know fact for fellow forum members! ;) Stirring up some discussion while Thorsten is evaluating options for the next release shouldn't be that bad. I'm not here to say Fvck arpeggiarator 'cause I don't need it and You can always use SID with CV output for that. I doubt that even hotter discussions really matter to Thorsten - of course the man himself knows. HE does incredible stuff with things he's interested in and listens to reasonable suggestions. Moebius

STOP!! Take your SID chip OUT before this test. Actually READ the main.asm for instructions, A0 means that this test application is testing SID chip pin A0 and it should be around 5VDC. ect. M

You too - Stop being naive! I was actually trying to POINT out there are competitors - which are making just as much "BUZZ" in the modular synth world and the most modular synthesists in need are anyway going to pick up that $499 Synthtech module. I'm a true believer, Yeah! But this Cult of Midibox is getting a bit worrying aspects. Some day You'll end up burning Behringers! ;D Sorta, sorta.. but remember we gave up more outputs/S&H for internal processing. Have you taken in the account a possible need for high quality DACs? Add 2 MAX525 to the price and the situation looks complitely different? AOUT_LC is only 8+8 or 12+4 bits. Seb uses 14bit DAC. That's true, but neither has MB_CV at this point. But both have a form factor that pleases modular synth builders. I'd love to see You fitting Core, DINX1, LCD, 4xAOUT_LC modules in FraqRack :-* Being over enthusiastic and not knowing your NON-markets isn't a good thing. /rant mode off Live in peace, folks ;) Moebius p.s. TK - You know I'm as enthusiastic as ever. Keep up the good work!!!

From SonicState: Stop being naive and start googlin' - Midibox CV is just as fascinating for modular synth community as any DIY midi-cv converter. It's not THAT novel. Some people are willing to invest their time and money. But maybe they rather build Marc Bareille's MCV32 or Seb Francis's Fat Controller? Moebius

Hi. MBFM might be a different beast altogether - but it´s much closer to the sound generating capabilities of the Megadrive than DX27. And TK already pointed out what's the difference: Wavetable sequencer. The DX has static programmed sounds with a few realtime modulation capabilities: generate a sound and play the notes. On the (old) game consoles music programmers had their share of the CPU time and ability to modify even all the parameters of the sound on one pass. The Wavetable sequencer in MBFM gives you the ability to modify CC parameters on the fly. It's of course not as powerful as directly programming chip register, but it's still useful. Moebius

Hi. Looking at the DX7 sysex spec, looks like one voice is 155 bytes of data. That´s simply too much for MB64 - which CAN be used to tasks like this, if it´s configured to "patch mode" + using customized meta events. robinfawell here on the forum has been working on program to dump preconfigured Sysex strings from the bankstick. You might want to have a look at his work. Moebius

Congratulations Pay_c! This is simply one incredible design! It has such a professional looks - it could be an expensive commercial unit. (and it would beat over 90% of competitors in attractiveness!) Moebius