Acid303

Well this is an old post which i started because I fried my TR909 CPU :) Just to tell you how this ended... A guy from Scotland repaired my 909. He not just constructed a complete new PSU which fits exactly in an original 909 case he also repaired all damaged parts and changed a chip so that the 909 has 4 times of memory and don't needs batteries anymore. The 909 now has a switch on the back and i can switch between the banks even if the sequencer is running. I am very very grateful..he did a marvelous job. Thanks for all posts :)

I feel the same way...2 years of waiting is a bit long i guess... Problem is that it is the best 808 clone project. Checked the other clones but they are all modular and no sequencer etc. In the meantime i tried the Acidlab Miami which is a quite good clone but all parts are SMD and with that i am not able to mod the Miami. I had the same problem with the X0xb0x. Waited and waited and in the end i bought 3 PCBs and PICs and got the parts from mouser and Digikey. That was the fastest and easiest way. But unfortunately we can't get the PCBs alone? In every note Doug gets out he states that he will soon be able to ship the kits but after 3 messages of that kind nothing happens. In february i was in hospital for several weeks and in hospital i got the mail that the kits will be out soon so i thought oh oh hopefully i am back home when the kits arrive. But nothing... So my question is is there someone who is able to provide the PCBs alone?

Hi, gibt es hier jemanden , der mir 1 oder 2 Platinen herstellen kann? Wenn möglich mit Bohrungen. Ansonsten die Frage wo ich das machen lassen kann. Anbei mal ein PDF-Dokument wo ihr sehen könnt worum es geht: http://www.msc175.de/geraete/DL-909/PDF/DL-909_DRUMSYNTHESIZER_MIDI_FULL_DOCUMENTATION_MSC175_DE.pdf und http://www.msc175.de/geraete/DL-909/PDF/DL-909_DRUMSYNTHESIZER_NETZTEIL_FULL_DOCUMENTATION_MSC175_DE.pdf Am wichtigsten ist die 1.Platine.. Laut Angaben ist die Platine von der Grösse 1:1 im PDF-Dokument abgelegt. Noch ne Info: Platinenlayout: Da es sich um eine einseitige Platine handelt ist das Layout auf wenig Drahtbrücken optimiert. Die Platinenlayouts haben einen Maßstab von 1:1 und sind NICHT Spiegelverkehr gedruckt. Danke mal...

That would be great ...thanx http://www.msc175.de/geraete/DL-909/PDF/DL-909_DRUMSYNTHESIZER_MIDI_FULL_DOCUMENTATION_MSC175_DE.pdf This is the complete documentation of the midiboard. It is in german so if you have any questions i will translate it for you... Axel

ok, that worked ! Got a sound without accent. The BD is a bit too soft that way :) So what is the next step? how do i connect it to the dout board finally? do i always need the 4k7 resistor? or how does this work? For the MB808 sequencer i need a BD with and without accent. Thanks theProf... add: ok, i need a voltage from 5 to 15V to get a harder/louder BD. The MB808 solves this with the accent circuit. oh oh...how do i do that... In my opinion i should go for the midi to trigger interface: http://www.msc175.de/geraete/DL-909/DL-909_midi_interface.htm after this works i would like to add the standalone MB808 sequencer which is discussed in this forum. So i have two seperate devices which i can use individually or together...

Update: @theprof: i think i know what u mean, but i guess that is a bit too complicated for me. What i tried is: i used my old MB core and 1 dout board. I used one pin with 5V. Triggering didn't work if only the trigger pin is used. no sound. Tried to find a way to trigger the BD but i have no idea how. so i looked for the accent trigger but i don't know where. I know that it should be Pin 14 of CN2 but how do i activate that? Also 5V didn't work . But maybe because i tried it with my working 909. And there a voltage is already there. So i guess i have to seperate it from the switch board first? I keep on searching :)

Hi, thanks again for you advice :) I think the midibox solution is the best way because it is the closest you can get to a real 909 with the sequencer. I know Thorsten Kloses software and it is very very good. I also own the MB6582 and i am really confident with it. Thanks Thorsten! As far as i know the MB808 solution has two velocity states? With accent or without accent? But thats nearly the same thing with the real 909 sequencer. What i dont know so far is how the MB808 reacts to Midi? Velocity sensitive? Or also accent or without accent? The best midi solution would be the midi to trigger interface: http://www.msc175.de/geraete/DL-909/DL-909_midi_interface.htm Be careful : it is german ! As i am :) But this is the closest to the original as possible i guess. Look at the schematics. But how do have to connect them? Which pin to which pin? D0-D5 from midiboard to D1-D6 on the voiceboard (909)? And the rest? Maybe someone can help me with that finally ;) @creatorlars: hmmm...you said that every pin of the dout board sends 1ms 5V? But i guess that if you like to trigger e.g. the BD of the MB808 there is a specific pin for that? Didn't find the exact pin assignment for the MB808 on the Dout board. Only the assignment of the MB Seq V3. But how each sound of the MB808 is triggered? Don' t know. Cheers, Axel

http://www.engineersatwork.nl/catalog/product_info.php/products_id/536?osCsid=f54b5fa7e7bdcd41ca41590bfefda01f This interface might be the right thing. - Has 23 trigger outputs ( 5 volt positive puls, selectable 1ms or 10ms per pulse ) and yes, i tried it on my working 909. You can trigger a sound directly at the trigger points of IC1 and IC10. E.g. the bassdrum can be triggered if you send an impulse to the specific pin of IC1. If you like i can give you the exact position. But i don't know about the accent thing yet. If it triggers without accent or not. With the rim shot trigger signal it worked. As I got a midibox core , dout and din board left, i will try it with the MB808 version and see how it works.

http://manuals.fdiskc.com/tree/Roland/Roland%20TR-909%20Service%20Manual.pdf This pdf are the service notes of the 909 Go to page 11. Then on the left side you see CN1 and CN2. On my working 909 i tried to find the 5V on those pins when a sound is being fired up. But all pins are showing about 4.59V. And they are not changing no matter what i tried. Then I remembered that the 909 has a trigger out. You can use the rim shot sound. So I used this signal (and that is a 5V signal) to find the trigger points. And finally i found them. So now i am able to send a 5V impule to trigger each sound. Not bad :) But unfortunately i was not able to fire up a sound by using the CN1 or CN2 pins. I used directly the pins of IC1 and IC10. IC2 to IC9 are responsible for Accent in conjunction with a resistor network which is responsible for the volume. Maybe i really have to tie accent and trigger together at first. Have to try that in the end. Any idea how CN1 and CN2 are working? Just tried to find how the MB808 is sequenced. I guess that it is a bit similar to the 909? How did they solve the accent and trigger thing? Can you send me the link to the wiring between MB808 and Seq V3? Just to see how the MB808 is triggered by the Midibox Seq V3? Ah, ok just found some information. I guess i just have to use another 5V output from the dout board and put it directly to an accent input of the 909. The more i am studying all information the more i get the feeling that i really can make a MB909 out of the destroyed TR909 ;) Searching for the Dout and Din board wiring. Which pin is for what? Is it the same as with the Midibox Seq V3? Cu, Axel

1st: Thanks for your answer. Yes, i guess the V4 Seq or dedicated MB808 seq is the best solution. Actually I got a Dout board and several core modules left from my former Midibox Sid project. I have a MB6581 so i can reuse all Midibox Sid parts. I am not quite sure which pin from the dout board i can use to trigger a sound. I guess I have to study all MB808 topics to find out about that. I am also not sure which pin of the voiceboard of CN1 and CN2 i have to connect to one pin of the dout board. I guess that will be try and error for me. What is necessary to trigger e.g. the bassdrum? 5V impulse? What are D1-D6 for? Regards, Axel @u-link: you do not also own a spare switch board?

Hi, i have a fully working original TR909 voiceboard. No power unit , no switchboard, everything else is here and working (tried it with a 2nd 909). Now i'd like to use that board as a midi expander. I have no clue how to connect a Midibox Seqencer or Core Module to that voiceboard. I know that there are two sockets on the voiceboard called CN1 and CN2 which are responsible for midi and triggering. There are D1-D6, 5V, ground on CN1 and on CN2 the connections are: 11 and 12 are the triggers....13-20 is Accent for each instrument. Here are the schematics: http://manuals.fdiskc.com/tree/Roland/Roland%20TR-909%20Service%20Manual.pdf Is there a way to connect it? I also found this: http://www.msc175.de/geraete/DL-909/DL-909_midi_interface.htm That is a midi board for a 909 clone. I figured out the D0-D5 connections but have no clue how to connect the rest. Maybe there is someone willing to help? Thanks in advance... Regards, Axel

Hi, auch bräuchte mal Tips von Leuten, die Schaltpläne lesen können und mir evtl. weiterhelfen möchten. Ich habe eine defekte TR909, wo alles ausser das Netzteil und das Switchboard läuft. Da ich eine 2. 909 besitze konnte ich das Voiceboard ausprobieren. Funktioniert einwandfrei. Nun möchte ich das Voiceboard alleine durch Midi betreiben. Ich habe im Netz folgendes gefunden: http://www.msc175.de/geraete/DL-909/DL-909_midi_interface.htm Netzteil kann ich mir selbst bauen, das bekomme ich noch hin. Nur wie Trigger ich am einfachsten die 909 an? Schaltplan der 909: http://manuals.fdiskc.com/tree/Roland/Roland%20TR-909%20Service%20Manual.pdf Wie verbinde ich die beiden Sachen? Ich denke, dass CN1 und CN2 auf dem Voiceboard dafür da sind. D1-D6 sind vermutlich Lautstärke/Anschlag? Laut Plan sind die ersten beiden Anschlüsse CN1 Nr. 11 und 12 zum Triggern der Sounds und die restlichen 13-20 für Accent da. aber ich weiss nicht weiter. Am besten wärs natürlich ne Midibox 909 draus zu machen. So wie die Midibox 808. Deshalb schreibe ich auch hier im Forum. Habe auch schon ne Midibox Sid, MB6582 und mehrere X0xb0xen gebaut. Core Module hab ich sogar noch übrig, auch DIN und Dout Module. Aber wie ich Midibox SeqV3 und MB808 mit dem Voiceboard zusammenbekomme? Keine Ahnung. Was wäre denn die einfachste Lösung das Voiceboard anzutriggern? Ich möchte einfach nur die Instrumente über mein Masterkeyboard spielen. So dass man halt das Voiceboard wieder nutzen kann. Vielleicht hat ja jemand Lust mir zu helfen? Wär sehr nett... Danke mal... Gruss, Axel

Ja, schon gelesen...deshalb hab ich auch nach nem DIY Projekt gefragt, weil eigentlich alle Geräte aufm markt irgend einen Haken haben... MPC: Keine Lauflichtprogrammierung...hab ich wieder verkauft (ne MPC1000) Electribe S hatte ich auch schon, bei der war das schon mit den SmartMediaKarten...und man konnte auch nur 99 Samples abspeichern...auch verkauft... MC909: War gut, nur war die im Prinzip immer im Multimode, also alle 16 Kanäle an....war immer eiin wenig umständlich..ist auch ein grosses Gerät....ich such halt was simpleres MC808: auch wieder kleinere Haken, die mir nicht gefallen...haab grad alles drüber nachgelesen...was wohl am meisten stören soll, ist, dass man den Sequenzer immer wieder anhalten muss und neu starten zum Aufnehmen...keine Ahnung, ich weiss nur, dass ich das vor jahren schon mal gehört habe von dem typ, der mir seine MC909 verkauft hat...und was hat er sich gekauft gehabt??? Ne Electribe SX....:) Suche also im Prinzip ne MPC nur mit Lauflicht... habe ne TR909 und ich liebe die Art diese zu programmieren, simpel, aber effektiv, und eben genau so nur mit eigenen Samples, dann wär ich happy...kleine Box mit 16 Steptastern...Lauflicht...evtl. Festplattenanschluss oder Speicherkarte... Midibox Seq V4 wärs ja schon fast... Electribe SX1 kommt dem ganzen aber schon recht nahe..

Ja , der Korg schaut schon mal nicht schlecht aus...ist ne Ãœberlegung wert...

Hi, habe bereits eine Midibox Sid sowie eine MB6582 gebaut. Nun suche ich folgendes: Im Prinzip den gleichen Sequenzer wie jede TRX0X, also 16 Steps, über Taster mit Lauflicht... Also das als Basis und dann einfach einen speicher, in den man einige Samples einladen kann...das übliche , also Bassdrum, Snare, Hats etc. Mehr muss es nicht sein...stell mir das nicht allzu komplex vor. Klar, man könnte auch auf den Midibox Seq v4 warten, ich glaub der wird in etwa so? Wie gesagt, eigentlich so simpel wie möglich...eine kleine Box mit 16 tastern...Samples kann man reinladen...Sample auswählen...und an eine der 16 Positionen setzen, ihr wisst schon, wie bei ner 808 etc. Gibt es da schon ein Projekt? hab bisher nur im kommerziellen Bereich die Machinedrum und die Xbase888 gefunden...da kann man auch Samples reinladen, aber die kosten auch einiges, da sie ja auch einiges mehr können... Gruss und frohe ostern... Achja, eine MPC hatte ich auch schon mal, aber mir gefällt das Lauflichtprinzip einfach am besten...auch der An1X mit seinem Sequenzer gefällt mir nicht so, da man ja Über Regler alles einstellen muss...ich bevorzuge ganz klar die Programmierweise einer 808, 909, 606 etc...genau so, nur halt mit eigenen Samples...