Jump to content

strophlex

Members
  • Posts

    536
  • Joined

  • Last visited

Everything posted by strophlex

  1. I have now built my second gm5x5x5. The firs one was using the 1x1 pcb and vero board and the second one with nils' 5x5x5 pcb. When using them with an usb hub all connected usb devices goes crazy. The mouse becomes slow and the midi communication is interrupted. I thought there was something wrong with my first messy build, but this second one is very neat and tidy so I don't blame my builds any more. I have tried with several different hubs too. Did anybody else experience something similar? Solutions?
  2. Anybody know of a place to buy nice (soft touch) pointerless encoder knobs in small quantiites? I guess not but I guess it doesn't hurt asking...
  3. Honestly, any pointerless soft touch encoder knob would do.
  4. I'd like to buy a few re'an p401 knobs for my MB-FM build. Have some?
  5. Allthough quiet late to reply here... I programmed an eeprom for my GM5 yesterday and recognized two things that might be troublesome during this process. 1) You must set the jumpers / cut the traces to open J1, J2 and J3 to make number of MIDI connectors to be set by eeprom. This is not mentioned in the redme file for the eeprom software but it is in the schematic for the GM5. 2) When installing the device in os x it showed up as the old device with the old name and the old number of ports. Ejecting, deleting and reinserting the device fixed this. If used together with another GM5 module I found out that changing product ID makes it unique.
  6. I would be supprised if they have all of it.
  7. Sorry, I don't know. But I think there are people to ask. The guys that designed the drum sequencers in this thread should know. Anyway, I am pretty sure it is assignable in the firmware so you could look into the source code and hopefully there are lots of useful comments.
  8. Take a look at this thread: I think it is what you are looking for. Also, I don't think this is the proper thread for this discussion. We should use the above mentioned thread instead. Good luck!
  9. Here, under download, you can find the schematic for the core module http://ucapps.de/mbhp_core.html and here, under download, is several variations of the schematic for the dout module http://ucapps.de/mbhp_dout.html Hope that helps!
  10. Is not 5% more like it? So a 1k standard resistor would range from 0.95k to 1.05k
  11. Thanks for the input! I guess you are right about that. Does anybody know how much current the MB6582 typically uses on the 9Vac inlet? I don't get what you mean here. Please explain this again. I plan to connect the new PSU through the 7-pin din connector on the synth.
  12. To clearify: I plan to replace the brick with the box and power the MB6582 from it when using the filters.
  13. I plan to make an external box with ssm2044 filters and PSU for my MB6582. As there will be need for a bipolar 12V supply for the AOUT modules I figured I might use the same PSU to power the MB6582. The C64 brick supplies 5V dc and 9V ac. The 9V are rectified, smoothed and regulated in the MB6582. If I ground one if the incomming ac pins and supply 12V dc on the other, would that make a good suply voltage for 9V dc? The 12V dc will be rectified (no change), smoothed (no change) and then regulated to 9V dc, right?
  14. Great that you got a working EQ!
  15. I uploaded a song that I made while lerning my Midibox sequencer. There is not too much time spent on it and it is made live with just some patterns pre programmed. Anyway, it might be interesting to hear. I used MB-6582, MbSeq v3, x0xb0x, Introspective 9090, a midibox controlled drum cirquet from a 1976 organ vocoded by a Novation Nova. This is all routed through a 16 channel mixer and delay and reverb are added by send to computer. Hope you ejoy eventhough I detuned the x0xb0x by mistake in the middle of the song... Link
  16. This is a really really cool project!
  17. Darn... Just ordered a batch from China... Really glad you are back!
  18. Does anybody know a place to but 64Y trimmer pots for AOUT-NG that is not rediculusly expencive except for reichelt? Or can someone from Germany help me buy them from reichelt? At reichelt they are €0.3 and at mouser they are €1.2...
  19. Have a look at this
  20. By amp i meant the PGA and since it was not in the chain at all, just forget about that. I haven't looked into the filter dessign enough to say anything about your last reasoning.
  21. So these signals have a frequency of 10kH and 100kHz and where sent through a hpf with cutoff frequency of 2kH? Looking at the square waves, I think they look low pass filtered, the 10kHz one more than the 100 kHz one. Is there some low pass stage in the filter you sent them through? In that case the 100kHz signal should be more affected then the 10kHz so it doesn't make sense. It's still early here so my head is not started yet. Anyway, I think the second osc. probe will show something. EDIT: I looked at the wrong pictures... Both square waves look hp-filterd. Looks like a hp-filter with cutoff frequency at well above 100kHz. Did you look at the signals through the amp only yet? I don't understand this "Since they're for some reason distorted already at filter output it's clear that PGA can't do anything about it... " Sounds like you assume the hp-filter works. Why not just connect the scope to the output of the amp if you didn't do that allready.
  22. It makes sense that the signal looks distorted. A sine wave will probably be passed through one filter only and thus there is no risk for interference due to phase differences. The other signals are composed of many frequencies. To get a complete square wave out you'll need to have the output of all filters added together, in phase. Thus, if you take the output of one filter only, it will not resemble a square wave, especially not the HP-filter. Attached a matlab plot of a hp-filtered square wave. Excuse me if this is old news...
  23. Did you use the component values sugested in the article? Did you look at the different filter outputs paralell on different oscilloscope channels? I think it looks like the channels have different phase after all, but I am absolutely not sure about it.
  24. All resistors in the signal path add up since thay are connected in series. They will all have the effect of limeting the current flowing throw the cirquit. If the voltage at the LCD inlet is affected depends on what more resitance there is in the other parts of the signal path. It has the same effect to 1) change R4, 2) change the trimpot and 3) add additional resistors. Thanks for the tip! I will change my resistor to make the LCDs even nicer!
×
×
  • Create New...