tago
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Posts posted by tago
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2 hours ago, Phatline said:
for me it is nonsense to use Potentiometer in such case... clear a case of Encoder+Ledrings or a Display and a Encoder
I debated pots vs encoders since forever with myself. Encoders are better in theory, but the winner is pots for me. They will also feel more oldschool/analog, if you know what i mean. Yes, led rings are absolutely nice to have, but it would be a monster of a project to build a full synth controller with 40-50 led rings. Another problem would be the frontpanel with hundreds of holes to drill.
To overcome (or ease) the pot position problem when cycling through "banks" and presets, i would like to implement a little helper that shows the old value next to the current value in the display.
The Novation Bass Station 2 has it's own solution for this problem (should be the two leds next to the 7 seg led display)
QuoteWhen you load the patch, knobs won't, obviously, correspond to the parameters that are used, but if you tweak the knob there are little LED arrows that show you whether the parameter is higher or lower than the value stored in the patch. Simmilar system to Korg ESX/EMX but better.
What do you think?
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Does somebody know an alternative way to contact SmashTV besides his shop's contact form? I got no confirmation mail, so i don't know whether my message has been sent to him.
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9 hours ago, Psykhaze said:
You can then link your inputs/outputs in your MIOS application to corresponding display behaviour.
So i can have LFO Section consisting two pots and nearby two buttons (or one toggle button) labeled "1" and "2" (or "1/2") to switch the group of pots between LFO1 and LFO2? The idea is to virtually double the pots.
Take a look at the Dave Smith Pro 2 and its columns of buttons (radio buttons?) 1-4 for delay, lfo and osc sections
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The hardware part (connecting buttons, leds and so on) is somewhat clear to me. I need to know more about software configuration/programming. Thank you for mentioning MIDIO128.
MIDIbox NG vs MIDIO128
It seems you can more or less have the same hardware modules (e. g. SCS) and the main difference would be the software. With MIDIO128 there is patch saving, has Midibox NG patch management too?
I'm struggling to understand the differences between both appilcations.
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Now there are only 3 of 6 pcbs i want available in the Midibox Shop. It's getting fewer by the day..
Hoping for an answer to my request by SmashTV soon.
Sorry, trying to be patient but its hard.
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Imagine a typical LFO section of a synth. The idea is to place one or two buttons near that section to be able to toggle between LFO 1 and LFO 2.
Would it be further possible to display a specific submenu on lcd with encoders for each/selected LFO?
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Hi Psykhaze,
thank you for all your input, much appreciated.
I for one being an electronics noob did read through the pages multiple times. There is really great info to find, but it's a bit messy to get an easy overview. First time i did look at Midibox (maybe 1-2 years ago) it looked too daunting to me (too many/large boards), so i chose to experiment with teensy first.
Now i'm willing to build my project on veroboards but i dont' know if it's right way. I'd like to try, but would need help (much help, maybe too much).
It's a bit rustrating that the ready to go pcbs aren't available at the moment, because i think it's a great easy introduction to the whole midibox thing. Once you ordered them there is no way back ;)
Only my perspective.
Best
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@Phatline Thanks for your offer :)
I'll send you an offer for my part.
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Since my pcb design experience is none existent (as a kid i did a few simple pcbs by drawing directly on the board - oldschool style),
do you think ordering all pcbs at 3pcb.com would be a good alternative?
5x pcb 100x50mm/2 layers = 10$ + 25$ shipping
Maybe i find others currently in need too.
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Hey guys,
thanks for your response.
The MidiBox Shop has not all boards available. DIO_MATRIX and DIN are sold out. All kits are sold out too.
I was hoping someone has a few boards laying around.
Maybe i should use veroboards!?
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I'm looking for the following pcbs:
MBHP_CORE_STM32F4 (+ 3M SD Card Slot)
MBHP_DIN
MBHP_DOUT
MBHP_DIO_MATRIX
MBHP_AINSER64
MBHP_MIDI_IO
Preferably in Germany/Europe.
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I'd like to incorporate a fatar keybed (3-4 octaves) into a classic synth controller.
Has anyone used both? I'm not sure how good the MIDIBox NG + DIO_Matrix performance is.
What is a better setup?
1 MIDIBox NG + DIO_Matrix
2 MIDIBox NG + Doepfer MKE
Thanks!
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What ready to use power supply module do you recommend?
Is a switching power supply ok?
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29 minutes ago, Zam said:
Also I'm not sure but I don't see any capacitor with your build, maybe your jitter come from chips/line/clock noise going all around your build
I tried capacitors between ADC pin and AGND beside software tuning like suggested on teensy forum, but no luck.
31 minutes ago, Zam said:No it's not
, I don't call more than 1% jitter a working system 
You're right it's only working in principle.
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Hallo zusammen,
hat jemand noch überschüssige Platinen auf Lager?
Ich suche:
MBHP_CORE_STM32F4
MBHP_DIN
MBHP_DOUT
MBHP_DIO_MATRIX
MBHP_AINSER64
Vielen Dank!
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multiple AINSER8 vs single AINSER64
If i understand right you would recommend multiple AINSER8 boards over a single AINSER64 in order to keep the cable lengths to pots/faders as short as possible? My front panel would be something like 80x25cm.
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Thank you for your suggestions. Yes, for 7bit its too much jitter.
I attached a photo of my setup (sorry its a mess). Cable length between multiplexer and 8 pots array is 50-60 cm. That cable has a additional connector in between after 50cm without any purpose. Can't remember why i did this. The wiring seems correct since its working.
The teensy is powered via usb from a tablet computer, no additional power supply.
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Regarding the noise issue. I found this article http://www.midibox.org/dokuwiki/doku.php?id=troubleshooting#how_can_i_avoid_pot_flickering_jitter
There it says
Quote*Update:* most of these hardware countermeasures are not necessary anymore, nearly all built MIDIboxes are working from the first startup without any jitter problems, since I improved the software on a way that it can handle with jitter.
So starlike wiring and short cable lengths not needed anymore?
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MB-Modulbox NG looks intresting. Would you recommend it for a classic synth layout (like a Minimoog Voyager) too?
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Hey,
frist, thank you for this wonderful project.
I'm trying to decide between teensy and midibox ng for a universal synth controller. I would like to have around 40 pots/faders, a 20x2 lcd with 4-5 encoders, 10 buttons with leds and a few rotary switches.
I did a test with teensy 3.2 and 8 pots connected via a CD74HC4051E. The cable length was around 50cm between the pots and the multiplexer to test a real world scenario in a big case. But unfortunately there was a lot of noise. Even with heavy software averaging i got jumping values +/-1 for 0-127 values.
Do you think there would be less analog noise using midibox?
Thnak you
Toggle a group of AINs and show corresponding submenus
in MIDIbox NG
Posted · Edited by tago
Maybe i discard the banking thing and try to get more pots/sections on my front panel. But in any case, i would like to place 4 encoders under the 20x2 lcd display to have corresponding sub menus/parameters for each synth section. It has to be an universal synth controller, that's my goal.