Sebo

Hi: I'm waiting for build a MIDIbox CV. I didn't build yet because I can't find the MAX525. I think option D is the better for me, so I could build a little 4 channel MIDIbox CV and start to add channels later. Thanks for all your work Seppoman.

Hi all: I finished my MIDIbox 64 some time ago, but I didn't have the time to post some pictures. So here are now. Also I modified the mb64_meta.inc, adding sysex to control some parameters of my Roland Juno-1 and my Oberheim Matrix-1000. I will add more sysex in the future. Meanwhile here's the file. I want to program it to control my MBSID, I hope I do it soon... mb64_meta.inc mb64_meta.inc

Hi TheProf: I think it's gonna take me some months until I going to start building the Alphadrum modules. But I'm researching all info I can in the meantime. The R2R ladder D/A seems a great idea. To use bigger EPROMs I think we don't need any mod to the circuit, the clock stops when the EPROMs reachs the end. The selector thing is great too, could we use the chip enable pin to do that? About non linear samples, I don't know if the original circuit is linear, I have to check that. But taking in account that most designs at that time uses mu-law samples and converters (Oberheim, Linn) as oposed to linear samples (Simmons), I think the D/A of the Alphadrum could be non linear. Anyway If want to make a D/A non linear we could borrow a Oberheim or Linn design. And we can use the original EPROM images or made our own (any good wave editor could save in 8bit mu-law format). Another nice mod will be a decay control. It could be done with a few resistors a cap and a pot added in the gate signal path (before or after R5 in the schematics). I think I have a simple circuit to do that (I have to look at it). Let me know about your advance.

Hi: I can't answer the question, but I was about to ask something similar. I'm building some drum modules too, and I was planing to trigger them with the modified MIDIbox CV as stated here: http://www.midibox.org/dokuwiki/doku.php?id=how_to_use_midibox_cv_with_a_dout As this configuration provides 32 triggers, I want to add more than one accent. At least 4, but could be one for every drum. My programming skills are very limited, so any help will be great. Thanks

Hey!! the Alpha Drum are the exact module I was missing. I want to make 2 or 3 (for a nice Lindrumm snare & hat). I don't know when... But I gonna build them. Thanks

Hi TheProf: I'm becoming a little bit mad about analogue drum DIY, I want to build more than my time let's me :) At the moment I have 3 projects running (9090, 808, DR-110), but to complete my set, I'm thinking in some extra modules, and those E&MM modules seems OK. I have the articles for the line (Syntom, Syntom II, Synbal, Synwave, Synchime) with PCBs. But the scan quality of Syntom, Synwave & Synchime are really poor. If you have good quality scans of them, please share them here (you can post files going to Additional Options in the Post Reply dialog). Also if you can post some sounds of the Syntom, will be great. I'm looking for Laser, Hi-Q, Zap kind of sound (very electro), and I want to know what the syntom could do. Thanks.

Thanks Stryd_One & MTE !!! At the moment I stopped the DR-110 and 808 project a bit because I'm trying to finish the TR-9090.

I have a SmashTV Core R4C. The problem was in one of the resistors under the PIC, I'm not shure right now wich was (the box is closed, and I don't want to open it again), but I think is was R2. Hope this help somebody in the future.

Problem Solved !!!! A not so good solder that brokes when I mounted the PCB in the case. Thanks

Hi: After a lot of work I finished my MIDIbox64 with 32 pots and 28 buttons. After solve a lot of wiring problems I get it to work (outside the case). Now I finished the case and mounted all inside but when I power up I get this 2 messages "Loading BANK from Bankstick" ... "Formating Bankstick" very quick a lot of times, then MIOS restart, and the same messages again, but this time the app hungs up after some time. I disconnected the bankstick, and the same happens, I disconected everything and no change. I uploaded MIDIbox64 2.4 again and no luck. Any Ideas. Thank you. except LCD

Hi: Thanks for the reply. I found on the net a lot of replacements for REF01, but I can't found them in the local stores. I'm going to use a TL431 with a few resistors. The TL431 works as a variable voltage reference, and is temp compensated.

Hi Jaycen: I'm not shure if my last post was posted :) my PC crashed... In any case, that's was I was saying: I'm far to finish the DR-110 clone. But I finished the PCB. I scanned my DR-110 and worked the image in Photoshop to get something usable. Is not tested yet (use it at your own risk), but I think is error free (some extra checking woldn't hurt). The PCB is solder side view !!!!! I gonna build the clone soon. I'm about to test the MIDI to triggers for the DR-110, but I didn't solve the clap trigger yet.

Hi: I'm building a little single channel MIDI to CV that uses a DAC0831 (actually I going to use a DAC0832 because is cheaper to do the test). It uses a REF01 as a voltage reference, but I can't find it in my country. I can't find MAX672 and MAX674 either (this two are replacements of the REF01). Anybody knows of another replacement, easy to find. Or can I make a discrete voltage reference (10V) for the DAC0831/2? Thank you.

Hi Jaycen: The DR-110 is an exact copy (I scanned the original PCB then I retouched a lot in Photoshop to get a usable copy). The original transistors of the DR-110 are 2SC something (I can remember right now). TR-808 transistors are 2SA733 and 2SC945. But the Alucinogen clone uses BC transistors. I was planing to use same as the Alucinogen clone in the DR-110 BD, so I think BC548 are OK. I was looking at the CR-8000 schematics and the sounds are very similar to the DR-110 sounds. Interesting...

Thank you stryd_one, I'll check it out. At the moment I'm working in a MIDI to Trigger interface to my new DR-110. I want it to fit inside the box, so it have to be really small. I modified some code I downloaded for a PIC16F84. I will do some test soon. My big problem at the moment is the clap trigger. The clap have 2 sounds one is triggered 3 times (the clap sound) and the other is triggered one time after the others (reverb noise). My coding skills are limited so I'm having a hard time doing that in a way that don't screw the timming of the other triggers. I want to make a simple DR-110 Bass Drum to test the triggers, what transistor you people use instead of the original? Also I scanned the DR-110 PCB to make a clone. I gonna use original semiconductors on this one, but to experiment a bit, a reemplacement is ok. Thanks

You don't need a PG300 for Alpha Junos, the PG-300 sends sysex. I'm going to customize my MB64 to program my Juno-1 (I think I said this before...) Actually I'm using and old Kawai MM-16 (a MIDI fader) to send sysex to the Juno. I think that the same applies to JX8P and Jupiter-8 (There's another midiboxer that customized his MB64 for control a MKS-80).

Hi Jaycen: I'm building an MB64 with 32 knobs and 16 buttons, and my main use will be programming my Matrix-1000 and my Juno-1, but maybe I use it to control my MB SID and a TX81Z and some other synth. The limitation is that the MB64 let's you set only 128 custom messages (sysex in this case), that's enough for a synth or two but isn't for more than two. I have all modules done, I'm working on the case, when I finish the hardware, I have to type the sysex to make the custom firmware. I'll let you know how is going.

Hi mess: I'm on hollydays, away from my toys. Search on the net for samples of the DR-110/55, they are easy to find. Check music machines site http://machines.hyperreal.org

I keep an eye on your work :)

Thanks for the link. Now I'm thinking to do some mods, but the DR-110 is really small. At least I want sync in and trigger in for every sound. May be some bassdrum mod (is the sound I liked the less).

I finally bought a DR-110 :) I'm looking for the manual. Is very simple to use but I have some doubts. In the meantime if somebody can tell me what P-BUS means (is marked on top of the Output Jack). Thanks Sebo

Hi Slorrin: I've mailed and PMed you, but I didn't get any response. Dou you still have one?

Hi: AR means Advanced Resonance, but I think there isn't a great difference with a standard R4. I have an R4AR myself a sounds OK. I have a R3 too, but I tried only once to choose wich I gonna use in my MidiBox, and to be honest I pick the R4AR mostly because is newer, the R3 sounds more gritty and the filter has less effect on the sound, but that could be a defective filter. Anyway, if the filter is working OK I don't think there are much difference unless you go for a 8580 or a 6582. Sebo

Hi Jaice: I'm not shure if I understand you right, but in the Burner's page is the eagle file to do the PCB. http://www.ucapps.de/mbhp_burner.html Sebo

Hi Slorrin: I want one SID. I'll PM you. Hope you have things sorted soon. Sebo