Alkex

Hi there! I am making a little Sid control surface handling 50 knobs and forwarding the corresponding CCs to the midibox SID. I plan to implement 12 LOAD and SAVE buttons that can store and recall the 50 knobs positions to 12 seperate presets. I therefore need to adress these values to 12 areas of the pic's "hard drive", so I don't loose them on poweroff. I kinda understood I need tables for this but aren't very confident with my programming yet and don't know where to start... I would really appreciate it if anyone could point me to a beginner's guide to reading/writing tables or just give me a kick start as I am really willing to learn! ultimately, I would write to a 13th table using a " hardware random generator" thus enabling a beloved RANDOM button :D Thanks in advance!! Alex

Thanks Thorsten! It's now working great! All the best, Alex

Hi there! I want to make a circuit as copact as possible for a clock and was hoping to use only a (custom miniature design) COre module. I need 4 Douts and 4 Dins and was thinking of the J5 as DOUT or J5 as Din applincations... Is there an easy way to Sub divide J5 into 4 ins and outs? or even better 2 Ains, 2 Dins, and 4 douts? The ultimate plan whould be able to reconfigure these on the fly in the running application ::) !! Any thoughts? A late merry Xmas and best wishes to all !! Alex

Hi thorsten, I was thinking about that for some time, but never had the courage to "make the leap" ::) I'll give it a shot! Best regards Alex

thanks but I dont really know how to work with numbers higher than 255... I'll try to experiment differant ways... all the best!

Hi Raphael, thanks for the hint! Could you tell me which function to use to display the entire 10bit number on lcd for further comparing/handling? thanks Alkex

Hi there! I got my hands on a broken CASIO DG20 I'm currently "MIDIBOXING" The rubber fretboard conducts electricity and resistance varies proportionaly to distance between 2 probes!! So it looks like I've got a Ribbon controller here!! Here is the problem so far: I'm using the AIN_VALUE_7BIT function to define a lader for the notes but in 7bit, the resolution is too small, thus causing fret to play neighboor notes randomly. Is there a method to convert the AIN reading into a 0-->255 resolution rather than 0-->127 or possibly even higher? I could monitor the readings on an lcd and therefore have a more precise design! Thanks for any help as I'm still beginning PIC MATHS! Alex

Hey it's my pleasure! That's what this forum is all about ;) I can't say it was complicated, I made it in visual basic. Check this out for a free MIDI OCX: http://home.modemss.brisnet.org.au/~mlevoi/midi.html you'll be making basic and even complex midi software in no time! Alkex

This little code will "magnetise" values between 52 and 78 to 64 (center position) GOOD LUCK! ;;!!!!!!!!!!!!!!!!!!!! PITCH BEND COMPRESSOR !!!!!!!!!!!!!!!!!!!! MOVLW 78 CPFSLT DATATOSEND GOTO NOTPITCHBEND MOVLW 52 CPFSGT DATATOSEND GOTO NOTPITCHBEND MOVLW 64 MOVFF WREG,DATATOSEND NOTPITCHBEND ;;!!!!!!!!!!!!!!!!!!!! PITCH BEND COMPRESSOR !!!!!!!!!!!!!!!!!!!!

Hi There! This should keep you busy: www.alkex.com/TRANSPOSER.zip Have fun! Alkex

Hi there! I would like to make a multi bank motor mixer but can't find EVANMKP08B14 faders anywhere, allelectronics been sold out. I can't really afford any of the others so I would really like it if anyone knew a source for ones! Maybe someone's got bored with theirs :P Thanks!

Thanks Thorsten, I'll hop to it then!

Hi there, I'm working on the software of a midified vintage toy piano I covered with knobs and joysticks. I ripped the joysticks out of my old playstation controller which have a nice soft grip feel. The downside is that I have some noise around the center position which is resulting in randomly detuned (pitch bended) performance. I would like to implement a software "regulator" to stabalise the output of the pitch bend when centered. I don't have a commercial midi keyboard so don't know the exact value of ZERO bend (origin) I would appreciate if anyone could tell me this... Thanks Alex

smycza, I havent tried this system yet (Cap hasting's one) but it looks like all that needs doing is this: -download and add aout AD5204 .INC file to your project folder -INCLUDE the file to your MAIN.ASM then if i'm right, the call AOUT_AD5204 should be available for use best regards Alkex

Hi! I would suggest using captain Hasting's digital potentiometer circuit http://69.56.171.55/~midibox/forum/index.php?topic=2556.msg17995#msg17995 The 4 "electropots" could control your external effects from CCs and patches with a little coding. I can't wait to get my Ad5204 so I can have a play with them too Alkex

Moebius, This was just what I was looking for! Thanks to you and Captain (Hastings) <-my place of birth! ;D

Hi there, I was looking at possiblitys of automating resistance between two points rather than CV voltages to one point. the circuit below allows us to increment/decrement the resistence of a digital pot using only two switches. http://www.maxim-ic.com/appnotes.cfm/appnote_number/1118 I havent much of a clue with electronics, but I was thinking that maybe a change in this circuit could enable us to control these digital pots with Dout pins ... Would anyone know a way of doing this? thanks in advance, Alex

Thanks Thorsten, I'll get busy "vectorboarding" some DOUTS then! Regards Alex

Hi, I recently started making my first front panel the "professional" way, using front panel designer software. the entire Sid synth panel (full with vectorised logos, etc) is only costing me 100 euros tax/pp included, can't wait to see the result!! I was therefore wondering if there is such an equivalent for moulding 3D objets such as wood carved Keytar frames, custom knobs, enclosures etc. This would be really exciting. Maybe Its just another dream, or worse, a waist of forum hard drive, but If anyone knew of such a service, this could be cool... Seya, and happy midiboxing! Alkex

Hallo, I would like to make a big MIOS CLOCK with DOUT driven large handmade seven segment LED displays, possibly even relay operated halogens... My question is, can I use the MIOS_DELAY routine to program a Clock? Not that I doubt one bit the reliability of mios, I just want to double check that my clock will not become "late" after a few days before I undertake this exciting but expensive project. Thanks in advance, Alkex

Hi! Happy to hear you like my idea, My guitar has been put on hold for the moment, leaving place for a all in one "sid midi keyboard" but here is how I handle notes with resistor laders: Yes, you would have to change the code, but fear not, I am Hopless at coding and ended up with a more or less reliable system. I stored each analog value in a register and continuously compared the live value to the previously stored one, any passage from and to 0v then sends NOTE ON or OFF respectively. As for the actual Notes, I just transpose up and up towards the read voltage. this must sound confusing but its a simple thing to do: example (where X is voltage (.4 volts in this example): Is X > 0 then NOTE=C else goto send_note IsX > .3 then note=D else goto send_note Is X > .4 then note =E else goto send_note Is X > .5 then note = F hope this clarifies things.... Alkex

Hi there, I would like to "midify" a sound emiting toy, thus turning it into an external midi sound module. I have about 20 connections I want to "close" and not very much space within the box for 20 relays. Is there such a thing as multiple relays, or chips that two pins could become switches etc? I must admit being clueless as to what exists on the market, As dout modules send 8 channels per chip, I though maybe there is an equivalent relay chip... thanks in advance for any hints, Alkex

HI, My old nokia phone just went bust, all the best for ripping out the lcd. My midibox has custom programmed simple oscillators for outputing variable midi CC. I would love to use one of these nokia displays as a little OSCILOSCOPE or better still, maybe a ADSR display for the SId Is it possible to display single pixels on these displays, on the fly? thanks

Hi all! Thanks for your feedback, believe it or not, this system is quite reliable in analog mode. I just mesured the (noisy) voltage ranges for each fret and used a "IF VOLTS>LAST FRET, THEN" etc Now to sort out a nice triggering system... Alkex

Hey, Reason 3 has full support for motorized controllers! I have a Mackie control and The layout for each module has been very nicley arranged on the Display Food for thoughts... Alkex