Zam

Proto 2 here it is !!! quick spec: -motor analogue PI driver -analogue touch detection -512 steep (9bit) without jitter (can be better with shielded cable from AOUT and to AINSER) -cross talk digital/motor to audio ... less than my console noise floor !!! -acoustic noise... did the fader move ? -response time better than 120ms for 100%travel 100mm -response time better than 80ms for 100% travel 33mm -never over shoot -two automation pass with complex audio material result in null phase test 50dB below my line level, in static condition of course (when fader reach the target) -to null audio under my console noise floor with two automation pass, I don't need to trim one more than +/- 0.01 dB !!! I stop talking, this is better than words https://www.dropbox.com/s/o6v29atn209kyxi/proto%20II.mov?dl=0 Best Zam

Master Thorsten !!! tks :) I confirm the bug correction, 1.033 pre6 work fine here Now I need to lower the jitter :) Best Zam

Yes it will be great For info my configuration is STM32F4, AINSER64 and AOUT_NG Best Zam

If your goal is to use motor just for "recall" purpose it's fine. Motor and H bridge make noise when swiching and rotating In another other hand, building a system like this (assuming less than 5 pot pedal FX) just for recall/snapshoot purpose is quite huge, an hand writing recall sheet take 10 sec... Interest come with the automation. Another idea is to have double track pot (audio + servo) without motor, but with a snapshoot system /preset recall with comparator from stored and actual value with just one led per pot that light up when both value are matched, you just manually move the pot until the stored value match. This implies a smaller system without all that stuff for motor, other pple will confirm but I think it's fine to do this with midibox Zam

Nobody for my AIN resolution problem ? I have a look around here but find nothing another "disappointment" I have since yesterday, It has nothing to do with MB_NG but it's about the MCU protocol, I discover that all the led for solo, mute, etc are updated in a 1/2 sec range, not when you press a button... Consequence is that I can't use any of this data to drive a relay driving an analog mute system. By now my working solution is to use another midi port (not the same as MCU) and automate my mute in a midi track with midi note. The less ... it's not user friendly like having the mute directly in the DAW channel, the same as fader and audio file The more ... as it is separate midi track, I can insert midi FX like time triming, or arpeggio like a pattern sequencer for mute automation Zam

hello I find (in my particular situation) that motor EMI is a problem, especially when running PWM and H-bridge system close to hi gain analog audio, even with fully separate supply rail and ground, layout is important, also mechanical integration and room between both elecronic. The "problem" is that there is one place you can do noting, it's the pot or fader himself, where audio track, servo track and motor share one mechanical system you can't change After 6 month building a protoype, I can tell the ALPS fader don't do the job in this situation. I think it's mostly due to the motor position. Rotary motor pot is different, I can't say, you have to try. In other hand, an automated fuzz pedal with motor brush noise in an unique FX :smile: Zam

TKS !!! without your system it will never happen I use pitchbend of course the AINSER respond to the bit resolution up to 8 bit but not more if I set resolution=4 i got 16 PB value in the 16384 range, steeped by 1024, this is OK If I set resolution =8, the step is 64 which mean 256 value in the16k PB range, this is OK But if i set resolution= 9, 10, 11 or 12 the step 64 is the same as before with 256 value (8bit) !!! this is NOT ok Any idea ? Best Zam

Teaser !!!

I'm close !!! Until now it's a success! hard work but a success :rolleyes: I'm on the soft side right now and there is something in don't understand about AINSER64 I check different bit resolution, but when monitoring the value I can't go better than 8bits ??? if I go less the value folow the bit resolution !!! I would like to go up to 10 bit (1024 fader position), which is the MCU resolution. Any ideas ? Zam

Ok! tks for the clarification. Hop we can have this one day :) Best JS

Ok i understand that. Is 10 bit possible like the MF_NG with pic18 ? But maybe I'm wrong? Is what you call "map" here the same as what we call "table" in mbhp_mf_ng_v1_005 ? I request this same function but for mios32 and AIN-AOUT Best Zam

It will be great !!! Same principle as the one you made for MF_NG Do you think it's possible to go up to 14bit map ? I hope to use this kind of feature in my analog PI motor driver proto using AIN and AOUT But in a more global view I think it will be a big step for lot of application, from exotic syth to modern analog desk with VCA automation. Best Zam

I'm in standby again on this, lot of work at the studio. I'm also waiting to have a decent basket to order some component, I blow so many transistor in the proto :rolleyes: Hope I can check everything left soon, and make the first 8ch batch (before summer...) then I plane around 6 month of daily use to be sure the system is strong enough.

Hey some update The analog PI driver work !!! I have little hard time, with some error, and burning part, but i'm close to have a perfectly tuned motor driver and safe design IT'S F....ING SILENT at acoustic side I mean, I don't plug it in the desk so I can't tell for the crosstalk at the audio analog side I will add pic soon :) Zam PS: I spot an error in the AINSER64 board (make me fool for on day searching my pb...) at J3, RC1 and RC2 is inverted... I don't know if it's already reported but It make sense to put some info/warning line at the AINSER64 MBHP description page !!!

Hello I just have a look at .ngr , your right, maybe it's the solution I just try to be little more familiar with .ngc before Best Zam

Hey Thorsten I think I miss a clear explanation :rolleyes: the MCU design don't have channel "read" and "write" button/led for the automation mode, but only "function" button (right hand) you have to press, then select the channel(s) you want to put in read or write automation mode with each channels "select" button. My design use dedicated button/led for read/write automation for each channel. For the moment the "trick" i find is to send a first note activating the "function" (D5 for "read" automation) then send the respective channel "select" note with the same button. It work in some way but my "select" led keep lighting. The DAW only return the "select" note (I think that's why I can't shut this led off...) also a sysex (the label "read" to print to the channel HUI/MCU LCD) I'm wondering if I can us this message as a "triger" to light up my "read" led when my daw have the "read" light on all this is the same for "Write" automation, plus if I hit "write" i need the "read" to be activated (if not before) and if I suspend the read i need the write to be deactivated (if not before) Hope I'm clear !!! I will study more the ngc user manual, i'm sure there is a nice solution Zam .... ho! ...happy new year !!!

AOUT arrives today :) i will test the motor driver soon !!! My analog touch sensor work fine (on the bench) I have some software question, is it possible to use a specific sysex message to light up a diode, (and another to shut down the same diode) I try with event receiver and forward command but without succes. Zam

Tks for info TK I will try! just need to fix/test other part of my build before :) best Zam

Hello What amount of latency ? if it's in the ms range it's not a problem for me. My built is an automated fader system for a 40 years old analog modular desk, I have some room issue in the frame, core and PSU have to be outside (maybe in a 19' rack few meter away), also interconnection/link between subframe (8 modules, channel/fader) need long wire due to mechanical restriction. It's not really different cases but in fact I have to think like it was :happy: Multi core is an available option I read somewhere in the forum that someone run two chained AOUT_NG with succes This line transmitter deserve a try in my build for sure... Zam

Hey Interested in this for my build, just have some questions :) is it possible to chain multiple line transmitter like this ? CORE<-->line<-->DIN/DOUT/AIN/AOUT<-->line<-->DIN/DOUT/AIN/AOUT Zam

Some update Today I receive the last components order I've got 99% of the parts needed, except AOUT_NG... i got MF_NG pcb in place from Tim :sad: Zam

Same as Kristal, isopropyl alcohol is the way to go. Once I buy "special" flux cleaner, just melt the pcb varnish :angry: best Zam

Hello Fantom My project is not an easier way than MF_NG with the PIC18 In fact there is more part involved, DA converter driving an analog PI controller for the motor (6 opamp 5 transistor). Then AD converter to read the servo track position, this signal is buffered (analog side) and splited, AD input and PI comparator MF_NG is a great system for digital controller only, but I need better noise floor for my analog console, digital/PWM noise leak badly to the audio side. best Zam

hey No need now to have exact current. If no table is available, I will do measurement when everything is hooked together. I plan to order some 3 or 5A psu for the proto, way enough for one fader I think then I will calculate for a complete system. I plan to use: one Dout and one Din, one opamp for touch, 6 button, 6 led, one relay. All this for one fader (proto) but if it's ok i go for 16fader... One Ain (64 is enough for 16 ch !) One Aout for 8 fader, two in total. Best JS question for TK :rolleyes: I don't remember if I ask before, is it easy for you to translate the MF table (to match fader curve) for Aout ? Best JS

Hello Novski :) Tks for the power supply precision, now I understand why I never find the 3.3v Input :) So I just need the 5v for all logic board, excelent ! By the way is there some info about current needed for each MBHP modules? Maybe i miss this too in my wiki search... Now I think I'm ok with pin assignment for any 10pin J connector. Best JS PS: STM32F4 is also available at RS http://fr.rs-online.com/web/p/products/7458434/