mb-808re
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mb-808re [2016/07/04 01:20] – [Introduction] psykhaze | mb-808re [2016/08/01 15:33] – [FrontPanel] psykhaze | ||
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===== Introduction ===== | ===== Introduction ===== | ||
- | The MB-808-RE is a re-edit of TOMS/CONG and BD/SD drum parts of the Roland TR-808 to be controlled via MIDI or CV in a a Eurorack-designed panel.It' | + | The MB-808-RE is a re-edit of TOMS/CONG and BD/SD drum parts of the Roland TR-808 to be controlled via MIDI or CV in a a Eurorack-designed panel.It' |
Some Circuit Mods from around Web & time are included .\\ | Some Circuit Mods from around Web & time are included .\\ | ||
- | ===== FrontPanel ===== | ||
- | {{ :: | ||
- | \\ | ||
- | ===== Community users working on it ===== | ||
- | * **[[Phatline]]** | + | ===== Original Schematics ===== |
- | * **[[Psykhaze]]** | + | |
- | ===== Getting Involved | + | ==== Global |
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+ | {{ : | ||
+ | |||
+ | ==== BD/SD ==== | ||
+ | |||
+ | {{ :: | ||
+ | {{ :: | ||
+ | |||
+ | ==== Toms/Congas ==== | ||
+ | |||
+ | {{ :: | ||
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+ | ==== Mods ==== | ||
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+ | //From **[[http:// | ||
+ | |||
+ | __The famous TR808-BD is quite perfect, not much to alter or improve.__ | ||
+ | |||
+ | changed R170 (470k) to resistor (380k) with a trimmer (100k) in series for adjustment of longest possible decay | ||
+ | put an analog switch between decay-pot and C43 to switch between 2 different decays. The sequencers BD-steps have 3 states which are rotated each time you press the step-button: | ||
+ | Snaredrum | ||
+ | |||
+ | __The snare consists of 3 elements: 2 t-bridge-oscillators and white noise going through a simple vca with a simple envelope for the noise-sound.__ | ||
+ | |||
+ | Tune for lower oscillator – R116 is replaced with 1M-Pot and 220k in series. The lower oscillator can be tuned then. The 220k will prevent bad sound in extreme potpositions. You also can take 2.2 MB-pot but beyond the 1M there wont happen too much. | ||
+ | Noisefilter – R22 is replaced by 50k-Pot and 4.7k in series. Again the 4.7k prevents weird sounds. | ||
+ | Noisedecay – i put a 10k-pot in parallel to C37. It is not the badest idea to have a socket for C37. Now you can replace it with different values for testing what you like most without soldering. To high values (>2,2µ) will result in slow loading time, you would loose the punchy attack | ||
+ | TR606-pitch envelope for both oscillators just copied the tr606-SD-scheme 2 times, one for each oscillator | ||
+ | the TR606-pitch envelope – when used – tunes the already hightuned oscillator 1 even higher. I changed C32/C33 (6.8n) into 10n and put some sockets for experimenting with different capacitor values witout the need for soldering. | ||
+ | after building the noiseunit i was not happy with the sound. no matter how this 20k-pot was set, the white noise somehow sounded ‘granular’, | ||
- | Just let a Private message on the forum to users already involved |
mb-808re.txt · Last modified: 2016/08/08 21:11 by psykhaze