moogah

You are thinking very much like me now :) I'm too busy until this summer to seriously consider it, but as my modular gets built I want to add a MBSEQ+CV to it along with a customized MBCV for the creating of midisynched LFO's and complex modulation sources. Hence.. I'm rather excited about that LFO!

He'll likely make more :) I've got one, but I'll take another 8) 8)

And do the dip.

I believe you are reccomending the photographic etching technique over the iron on method To which I would agree.. I failed miserably over and over again with the iron-on stuff. Got it right the second time with the photographic stuff. Either way you are going to spend a chunk of money to get setup to etch AND DRILL your own PCB's.

I would think that the kits from Mike and SmashTV are actually the cheapest way of building this. Certianly if you don't have any expirience sourcing parts.

erm.... Prost?

the 9090 does have a PIC inside for the MIDI interface, but to the best of my knowledge it isn't midibox based.

Hmm.. perhaps I need to retract my statement about digital envelopes, that little design looks pretty cool! And it uses non linear curves, which means it might actually sound decent! I'll have to build one up and see if it passes the ears test 8) 8) Very cool That VC-LFO looks even better tho!

I've not got a PM at the other forum confirming that the 5 units are mine yet, but I don't think there is a problem with that. I don't think we'll have a problem scooping up the rest of them and I'm sure they will all find a home here 8) 8)

Check this thread out: http://www.prodigy-pro.com/forum/viewtopic.php?t=21397 ;D ;D

Absolutely top-notch work here. Your wiring scheme is a lesson for all of us here! ... any chance of posting some layout files? ;D ;D

Brian Adams.

Well, you can put a resistor in parallel with the pot to reduce the resistance. This will change the response curve as well tho..

Wow! :o :o

Found an interesting tidbit last night, Ray Wilson (Music From Outer Space) has PCB's for a SVF and 24db filter both with VC Resonance available :)

WOW :o :o Inspiration is right!

OOh! Yea, Vactrols are probably a really good idea, the range of values available have a good chance of working on the filters you've mentioned and all you'll have to do is deedle around a bit with resistance values. As the Prof says their slow reaction time won't be a problem on a rez control, great suggestion!

Eeek. This is possible, but not a simple matter of subing an OTA for a pot. I'll look into it sometime this month. Also, Rob at www.emulatorarchive.com his PCB's for one of the early ARP filters (4072 IIRC.. got one in a drawer here). Good stuff, same problem in that CVing the rez will be a bit tricky.

Ok, now that my 808 clone is actually complete I've finally got a little bit of bandwidh open for other projects. The first of which is going to be to take what I've learned while making the 808 happen and use that to come up with an alternate build process and specialized application for creating a drum sequencer with the standard MB modules. My focus here will be on streamlining the current SEQ application and interface at the beginning but in code to provide a lead in for the possibility of making multi-line/32-step/gizmo and gadget sequencers as discussed in the x0x seq thread. I will possibly propose an "standard" faceplade for a MBDrumSeq to bring it inline with the other projects. Hardware wise the changes are pretty simple. You will need the same parts used for the normal SEQ, but only 2 encoders are required in my current layout. Of course more can be added, and there isn't a technical limitation to using all 16 GP encoders. However, my implementation of the software does not require the use of an LCD screen and encoders to modify parameters, they are simply optional. I based my decisions on my normal workflow with x0x style boxes where quick and intuitive access to parameters is the primary objective. Since the 808 and 909 provide such a good example of being able to accomplish great musical results with only a few parameters to control they will be my model for the software (909 in particular). In the initial release of the software I will have these features ready: - 16 step editing (duh) - Track/Layer selection using the GP's (drum mode by default?) - Patten select/save without needing LCD - Individual mutes per layer for drum mode - Normal mutes to select which of the 4 patterns is playing - Dedicated tempo knob Many of these changes are already done and used for the 808, but for that application I decided to keep things as simple and true to the original as possible. I had enough work to do with the CAD work and testing the analog circuits! As I get more time to work on it I will bring an 808 like A/B pattern switching feature into the mix and pattern chaining through song mode. As many of the features of the standard SEQ will be implemented without needing the GP encoders. Pattern morphing will be cool too ;) Now, I'm not totally sure that using drum mode is the way to go, so this might change. However, it does seem that loosing the independant flam value is worth the gain of being able to sequence multiple devices in a centralized manner.

Awesome :) I'm glad someone is starting work on a project like this, using MB hardware as a means of bridging the gap between classic analog circuits and modern control schemes! Your idea of embedding a soundcard right into the unit is really cool! It may prove to be a bit ambitious tho, you'll have a good deal of work to do getting various filters fully CV controlled... something I can prolly help out with ;) If you have access to them I would recommend starting this off with a SSM2044 based filter. They sound good and it will give you time to work out other areas instead of dealing with analog nitty-grittys. I've actually got a similar project lined up which is to take the digital brains out of my Oberheim OB-1 and replace it with a slightly modified MBCV to provide full midi control and patch storage, so if you keep posting your progress I will do the same. Timeline for me is pretty relaxed, I'm busy as hell with work and school so this summer is my goal.

Man, that SEQ still blows my mind! Excellent work! :) :)

LoL, Actually I found your post there the same way you ended up in the wrong place.. I thought it was a response to my thread ;D

Hey thanks man :) Wrong thread tho ;) This one has been dead for months (as it should be). I got confused based on the titles myself too, so no worries. Don't loose hope about the 808 too, I'll be posting as much material as possible regarding how to get the parts needed etc so if people have the motivation to do the legwork themselves there's no reason that the list stops at 50, I'll be glad to help out in that regard, I just need to stop spending money on this project soon! ;)

Hey Yall! It's been some time since I visited this thread, but I now have an actual working unit on my bench and a clear picture of exactly what it is that I want to do with the 808 project. It goes as follows: I've finished the PCB work in Eagle and have gathered a list of people who are interested in building an 808, I've also acquired many of the difficult to find components, and in many cases I bought them in bulk as that is how they were available (100KA PCB mount pots being a prime example of this!). This means that in addition to doing a run of PCB's I can offer partial kits to as many as 50 people thereby making it easier and somewhat cheaper to build such a large project. I will not be marking up the price of any part of the kit, it's good enough for me that I end up getting the parts I needed at bulk cost without having to sit on 100's of parts I don't need.. and, of course, I'm getting an 808 too, and thats the biggest reward ;D. So, if I'm not doing any of this for profit, why am I asking? Well, because at the start of all this I wasn't really sure how it was all going to work out, and I knew I was spending a decent amount of cash making this happen, at the time I was considering how much money I would be able to make back by charging as much as 50$ for a "kit". However, I really didn't keep track of how much was spent, and a great deal of it was on stuff that is useful to me beyond the immediate scope of this project (like Eagle). So, this is really about setting a standard that I can look to in the future with other big projects I want to do and feel confident that I'm actually benefiting the community and following the rules. Also, included on the PCB is all the MB hardware to make a MBSeq, and I think it's important to clear this by TK and Smash before releasing another version into the wild. It's worth noting that I've made sure the schematic for the modules are identical with only a couple minor exceptions (I'll elaborate) and I've made an effort to preserve the quality of the layouts to protect the MBHP name (although my skills are a good bit short of SmashTV's). I have talked with TK and Smash about this before while I was still working on the layout, but I would like to complete a formal request now as I get a website online to keep all the information about this project in one place. You can check it out at www.eight-oh-eight.org/phpbb2 and in some short time you can check out the main site at www.eight-oh-eight.org which will have all the documentation I can possibly come up with. So, what is missing in my layout of th MBSeq? Most of it is on the core, J1 and J2 are not there because there are taps on the PSU for this. J7 is not there because I can't think of a reason to have motorfaders on a drummachine. J8 and J9 are there, but they are at the end of the DOUT's and DIN's on the PCB and J10 has been left off too.

Hmm, doesn't sound too bad. Can you provide a few more details on what you are uploading with? MIOS Studio? Can you verify that you get the "MIOS v1.9" splash screen at startup? (sounds like you do). If you just start the device without trying to upload code do you get the upload request message more than once? If so than the MIOS upload was not really successful, try again.