stryd_one

Rated >:( :o ??? ::) :-X :-\ :'( :P >:( >:( >:( For USB 1.1. Instant bin fodder. Get a refund dude! All that crap is going to be because of USB 1.1. The speed and spec of the machine are not as relevant as it's configuration (ACPI disabled during pre-installation, IRQ steering off, etc) when it comes to this. Are you sure you're not sharing the bus of the controller with some other USB 1.1 device? I'm sure even Behringer are not that stupid.. When everyone was using USB1, the manufacturers could blame it on user error, but not these days... Edit: I'm sure the next driver version will fix some of this too - but never all of it.

Hi Guys, I'm hoping you can lend me some advice on a few things. I'm looking for software to perform the tasks below. I'd like them to be Freeware/Open Source/Functional Limited version (like eagle), but I'm willing to pay for the software or hardware if needed.... Also, a certain level of complexity is preferable - I want to keep the apps as simple and easy and quick to use as possible, and yet I don't want to be uncomfortably limited in my workflow by under-spec software. So......... Code Debugging - ASM and/or C, mixed code supported - ICD2 required? How do you guys go about debugging code for MIDIBox? Are you using something like the ICD2 (Which I gather feeds the PC back to MPLAB for debugging in the pre-compiled code? I don't know...) Obviously we could code, send it via MIDI to the bootloader, and if there are problems, fix them up, and upload again....but I can imagine that for more complex code, this could be a time-consuming way of doing it... Does the ICD2 even work with the bootloader/uploaded app, or does it only work with apps burned directly to the PIC from the burner? Schematics/Circuit Emulation - Simple, quick and easy. Something like Eagle's schematic designer only with simulation features would be great... I've seen many, but I don't really know enough about this stuff to tell a good package from a crap one. Heck, until now I was doing all my simulations in excel :o From the packages I've seen, some are FAR more complex than I need. It's not an easy decision for me, hopefully you can tell me what you are using. Panel Design - Drag'n'drop of controls, LCDs, LED's etc onto a grid would be great... Just want to be able to throw something together quickly. I guess that's just a vector gfx app with some templates for controls? Wilba put me on to Zoner Draw which is great, but not a freebie, and my trial is running out. Hope you can make some suggestions. I can work around these issues with existing softare, but it's taking me a long time to do things which I am sure can be done more easily... Please share your thoughts! :) Thanks :)

Search the forum and/or read the wiki. You'll find what you're after. HINT: One topic above this one, stickied..... how'd you miss that?

Thanks TK. I'll order in the next few days :)

Bugger :( Well at least I don't have to feel bad for pushing your bids up ;)

Is there a commonly used value or values for the pots in the analog FX?

Hey did you win that on eBay recently? :) Man that controller is absolutely do-able. You could make a function to send the patches when it powers on too :)

No sweat man. I might order a few samples and meet you there :)

Interesting... A MIDIBox could do that with it's eyes shut though ;) Nice looking pads eh?

I know where you could find a buyer for them :) Wish I still had a good CAD app on here (and the long-lost skills to use it) ;)

OK I found out why I kept getting that log taper, it's because I had worked the schematic out wrong, because I was unaware of the design of the digipots - on these, the resistance is set on the wiper terminal, not only in two parts on the A and B terminals. This is what analog knew that I didn't ;) More examples of scaling pots with parallel resistors: http://ww1.microchip.com/downloads/en/AppNotes/00691a.pdf http://www.edn.com/article/CA341452.html Oh and it seems I was right about the amp being used to level things out... And about the equation used to calculate Rp. Yay! FWIW, for an 8bit 10K pot, it's closest available value is a paralleled 430 and 43ohm resistor, which equals 39.09 Ohms, not far from the intended 39.0625 Ohms I've got a nasty big excel document here with the values mapped out if you're interested in seeing pages and pages of data that result in a graph that looks like this: X ;D Very very boring stuff... But you can imagine my excitement at seeing those boring straight lines :D So, we've found a way, confirmed in theory by microchip and analog devices and EDN, to get a good resolution out of the digipots. Now if we can just get them to keep that nasty digital noise off the audio buss.... How's that part faring?

If any aussies are interested I have a source here for about $50 a pop. Edit: I'll buy them here and ship them anywhere in the world at cost if you need them.... but for you guys only - I'm your mate who lives down-under, not a distributor :)

Holy crap that sounds nice :) Great idea too, to put it in a mixer like that! I will remember that trick for my FX, and keep an eye out on ebay for cheap mixers :) TK, do you know if the SSM2044 would be suitable for a similar application? I have a good cheap source of those IC's, but the CEM3378 are very hard to find....

Hi Frank, thanks for all your work. It would be great if you could share it with someone like TK or Smash or Moebius or someone, even if it's not finished yet. I'm 100% sure that they wouldn't mind keeping it confidential until the final is released (or the project is cancelled or whatever)... Just consider it as a backup ;) Many appllications are spoken of like yours, but then disappear later on. It would be a real shame for the community to lose such a great app as this one :( I beg of you, please send a copy to a regular! THANKS! ;D

Welcome aboard :) Hey if you find any links that you find you use a lot, please let us know. Don't knock BASIC man! GW BASIC and 8088 ASM were my first ever programming languages hehehe Seriously though, programming languages are never all that different. You'll find that once you forget about using line numbers to refer to things, you'll be set, and you will be able to apply similar concepts to your C code. So what have you got planned? :)

No sign of sheepslinky in a long time :( Hope he's OK. Capt Hastings will be around though... But he hasn't been onine for a couple of months. This chip looks kinda interesting. It's a shame the oscs don't go a bit higher, and the filters can't be controlled, or it'd be really badass.. Still, I'm sure you could do some really interesting things with this. It's always such a shame when people come here and are working on something but never end up sharing the sources. Hopefully developers reading this will take it as a lesson and consider sharing the unfinished sources of their work ahead of time... You never know when something will come up and you will have to drop the project :( And it's a shame when so much work is done and lost forever :(

Yeh those number sound right. I was thinking about maybe finding a way to reconfigure the board... With that 6 channel chip you could have 6 coarse, or 3 coarse and a fine, or two fine... The PDIP thing seems to be the go, the only downside is the one extra data line, no biggie. About the log stuff: http://www.edn.com/article/CA46509.html or http://sound.westhost.com/pots.htm (down the bottom) or http://www.geofex.com/Article_Folders/potsecrets/potscret.htm but my problem isn't implementing log tapers at the moment, it's avoiding them.. actually I think it's reverse log or something, but yeh, it's this "Second, it is also important to choose an Rp, equal to a step resistance of the digital potentiometer, to achieve the fine 22N adjustment" "Rp = RAB / 2^N" So RAB I assume is Resistance between A and B pins, so 10K, divided by 2 to the power of N, I assume N is the bit depth, so it would be 10000/256=39.something (which I've been rounding up to 40 in my previous posts), that is the resistance for each step. When i simulate the resistances put out by Rp and U3, i get this killer taper, it's pretty useless. I actually think that my calculation of the effect of Rp on U3 is wrong... I'll keep working on that today. Now you might have noticed that the tricks for log tapers don't work so well in variable resistor connections (as opposed to voltage dividers), and this is another factor I keep forgetting to mention about those AD525* pots - they have log tapering built in....

There's a thread about controlling FX from a midibox that might interest you as well, when it comes to controlling faders and in particular pots. I really hope that you have a great success with this - as Roger has mentioned, this has not been done as yet, so you would be a real pioneer. Keep us posted with your progress :)

Wow badass. I really like the new boards man, very professional! Probably terribly difficult designs if we had to make them ourselves, but... we don't! :D Thanks again Smash!

Hah! I laughed so loud when I read that hehehehehe :) Yeh, it's a love-hate relationship for sure! Glad you're feeling welcome man :) Don't stress about programming MIOS, TK has made it very easy, considering how complex it really is behind all his awesome code. You'll be midiboxing away in no time :) I was thinking though, you might have an easier time of things if you are able to connect an LCD. You should be able to get one for like $5 (just 2x16, no backlighting or fancy stuff that you don't need for testing), it's so worth it. Good luck!

Tear it to bits man :)

Mental note: buy PS pads. thanks Sasa!

I'll explain this from the beginning, I think you already know most of this, I'm not being condescending or anything, I just couldn't word my analogy very well :-\ Well, pots are like two normal resistors with a single shared pin. You can think of each digipot as a resistor "AB", which is split into two sections at the "W" wiper, becoming resistor "AW", and resistor "WB". In that schem (figure 6), the AW resistor on pot U3 (on the right) goes to pot U2 (the top one), where only the AW side of the pot is used. U3's WB resistor goes to pot U1 (the bottom one). At U1 only the WB resistor is used. This way, the architecture of the split into two resistors is maintained. I'm not sure about this, but it seems to me that if only one of U1 or U2 were in place, then the total resistance on either side of U3 would be mismatched, and this would lead to unstable results. I'm not so sure about that opamp there though, is that to compensate for the voltage drops over the resistors or something? What does that feedback line to the - terminal do? That particular model is SMD :( I'm sure we could find a replacement, but is it needed? I've also had troubles with Rp. Every value I try, seems to give a log curve instead of the linear response. I think I've got the math mixed up with that resistor... As for bit depth, I'd prefer to stick to 8bit for all the pots. Sure, we'll end up with some overkill with the daughterboard (or whatever it is) fitted, as they'll go up to 16bit and the lowest two bits will be unused, but.... if we go for 6 bit then the coarse control without the fine control will be too coarse :( PDIP... Short answer yes, long answer maybe heheheheh The PDIP chips can do it for sure but the better chips for the jobs are SMD... For example with the AD525x and AD523x there is syncronised setting, where you set all four resistors at once, which negates the need for a second data line. They also retain their settings when powered off so that the FX will continue to work. Personally, I don't think those advantages outweight the difficulty that comes with SMD... If anyone else is reading this thread and thinks they can explain Figure 6 in this document: http://www.analog.com/UploadedFiles/Application_Notes/20666174AN582.PDF it would really be appreciated :)

I think you should read the website and forum some more. Have you run a search of the forum and read all the pages on ucapps.de a few times?

Chicken biscuit good yeah!!! ;D LOL I dunno what it means but it sure sounds tasty heheheh