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====== EASY CV ====== ===== Introduction ===== Digital created LFO+ENV with CV-Output. No Displays, No Menues, Minimal buttons, much Scopes, much Led-Ring-Rotarys (Planed for LRE-8x2CS), one big UI with complete functions for one LFO+ENV Voice... switching between the UI-Voices is done from the BREAKOUTMODULES...to this later LFO+ENV are mixed together softwareside, to use only one CV-Output\\ 8xCV-Outputs (VOICES) are supported > if u are on a VCF+VCA-Setup = 4 Voices on the Analog-Side (4xFilterbank)\\ Copy Paste for LFOs and ENVelopes between the Voices\\ Copy Paste for a Songa aka Preset aka Bank aka Program(change)\\ Jam Style Pattern load (next Preset Display) + Preset Morph between Current-Preset and Next-Preset\\ A Breakoutmodule for each CV-Output, with Depth-rotary, Focusswitch (Pushrotary), 2x Scopes (LFO+ENV) and LFO/ENV-Switch to show on one Display the Mixed Waveform & to switch the Rotary to "ENV" or "LFO" Mode (there is only space for one Encoder - maybe just make PAN Style, instead of 2 individual level -maybe more live feel?, how ever when using an 3Stage switch, i could disable MIX-View, or display it on ENV or LFO...maybe a good choise ;) ) The Depth-rotary has no Ledring, want to display it as a bar or as Value in the scope... Whole thing will not be compatible on MB-CV concepts... i will copy code snippets and so on, but i have to understand it from scratch... anyhow this is not generic ===== FrontPanel ===== ==== Brain ==== __THE **LEFT** SIDE of the BRAIN > Preset-Management:__ **Save** & **Load** the PROGRAM, can be done by Midi-ProgramChange -or With the LOAD-**PRESET**-Encoder\\ then press **LOAD** -or **Morph** to the next Program slowly with the MORPH-Encoder\\ -Another option is to take a **PUSH-ENCODER** for **LOAD** & **STORE** > and load and store it by pushing it... would free 2 buttons for other functions.\\ MORPH?: \\ -The Upper 7 Segment LED- Display: is the **LOAD Display** indicate the new Program with ENV+LFO -The downer7 Segment LED- Dsipaly: is the **STORE Display** it indicates also the current Program with ENV+LFO\\ --with morph you crossfade between both Presets (be carefull, first Store the current Preset\\ **Paste** & **Copy** do their job @ the whole PROGRAM Memory\\ **ENV-PASTE** & **ENV-COPY** do their job @ the selected Envelope > (ENV-Voice selection is done by the breakout Modules) ... LFO..same\\ Midi-Channel Note NR or Number of Envelope is a real programmer job (C), with usb-upload from computer .... this is a individual device, and once set, it has to play > and it just should do LFOs and Envelopes Fixed routed, no generic, special > in my case for a filterbank. {{ :phatline:Easy-CV-BRAIN.png?direct&900 |}} __THE **RIGHT** SIDE of the BRAIN > LFO + ENV Settings (one Voice):__ ADSR with:\\ **CURVE** Paremter which give exponentially to it (no straight lines While Fall and Rise)\\ **Short:** just shorten the Maximal lenght of a Envelope, haveing more Feeling on Encoders should change Scope Display also... \\ **LFO:** get synced with Midi, and there is a retrigger by Notes...\\ **Phase:** offsets the start-Phase \\ **Delay:** simple delay (nte-Trig)\\ **Rate:** clear from 8 wholes to 128th or so\\ **Wave:** access to the Waveforms\\ **Duration:** interpret Midisync in trippled, whole notes or whatever...\\ **DEPTH:** is the maximal Value of FALL and RISE and SUSTAIN, i know i loose resolution with this...but i have to have a memory filterbank,...doing depth instead with Potentiometers on Filtermodules... is no memory... ==== BreakOut ==== 1. Discharged UserInterface for the Brain in "Island mode" (Scopes + Digital-CV-Amount)\\ 2. CV-Breakout EuroModule to be located near the CV-Destination (example: a Filter).\\ 2 Waveforms (ENV+LFO) are mixed together softwareside\\ that bring 2 advanteges:\\ 1.save one CV-Output\\ 2. the Amplitude of each Waveform is saved in the patch, so the CV-Amount to a Filter is saved in the Patch\\ That bring 2 disadvanteges:\\ 1.LFO or ENV cant get patched to individual destination\\ 2.the Resulution gets lower 2 very low, and the code has to be adptet much... or have to be made from scratch Because I use the device for a Memory-Filterbox (VCF+VCA), i am ok with the pros and cons, so i call it EASY-CV\\ {{ :phatline:Easy-CV-BREAKOUT.png?direct&130 |}} **Envelope Scope:** show the ENV-Waveform \\ or the Mixed-CV-Output-Waveform (when Switch is in LFO Mode)\\ and show the Envelope-Amount with a BAR\\ **MIXED CV Plug:** CV-Output > Mixed Waveform ENV+LFO\\ **Switch @ ENV:**\\ -Depth-Encoder change ENV Amount of the CV-MIX\\ -ENV Scope will show ENV Wave\\ -LFO Scope will Show CV-Mix\\ **Switch @ LFO:** visa versa ENV\\ Press the Encoders built in **ENCODER-BUTTON**:\\ will switch the BRAIN-A-D-S-R and L-F-O ENCODER to the Page for THIS Module...\\ workflow, see what you have with a Scope, over a filter, and edit exact this selected CV on the brain in full detail... ==== VCA-VCF ==== THE VCA and the VCF are controlled with each one CV - each CV has a LFO and a ENVELOPE digitaly mixed... fixed in routing.\\ {{ :phatline:Easy-CV-VCA-VCF.png?direct&260 |}} basicly a simple VCA (MS20Like) that drives the input of a Audio transformator 1:3 which is a Neutrik NTE10-3 (9€)\\ this "Tesla" Hi Gain - goes now thru the Post-VCA-Gain-Potentiometer - which then overdrives the 303 Filter (my prototype was a Freebase 383)\\ sound now goes to the Post-VCF-Gain-Potentiometer\\ now sound goes into a OP-Amp - to have the change for a light overdrive\\ From this point a EFX-Send Potentiometer send the Processed Signal to a extra Output (EFX-Send)\\ With the +DRY-Switch, we switch the orginal Signal additional to this EFX-Send-Potentiometer (or not)\\ Parallel to the EFX-Send Potentiometer is the DRY/WET Potentiometer it Pan between Orginal and Filtered Sound.\\ after DRY/WET come the Volume-knob and the Audio outs...\\ === Original Schematics 303 - VCA-VCF === {{ :phatline:VCA-VCF-303-orginal.png?direct&900 |}} === Mod Sources === FIXME Fill with 303 mods take orginal VCA (have a bunch of this ICS) or make MB33 Style with standart components... ==== Example for a Filterbank ==== Here are 8Envelopeś 4xfor VCF 4xfor VCA... in fact there could be used more then this for example 8xVCF and 8xVCA...since the BREAK-OUT-Modules are Modular, and they share the same "Main-UI"...the only limiting factor is the CODE...i am not a C-Guru, and maybe i will still have timing problems with 8x CV-Outs...we will see. {{ :phatline:Easy-CV-Example.jpg?direct&900 |}} **I will use it to filter:**\\ 2xGuitar-Loopstations\\ 1xGuitar\\ 1xPercussion-Master\\ ===== General Design ===== The panel size is 3U, Eurorack compliant ==== FrontPanel ==== ==== PCBs ==== The Analog Circuits (VCF+VCA) get sandwitch as normal (not90° angeled) ==== 3D View of Sandwitches ==== FIXME make concept ==== 1. UI Parts Listing ==== === BRAIN + BREAKOUT === * [[https://www.thonk.co.uk/shop/3-5mm-jacks/| Jacks 3.5mm @ Thonk]] * [[http://at.rs-online.com/web/p/kippschalter/7347145|SPDT Switch ON-OFF-ON @ Rs-components]] ^ Value ^ Type ^ Qty ^ |3.5mm Jack |Vertical PCB-Mount |13 | |Switch |SPDT Vertical PCB-Mount ON-OFF-ON |1 | FIXME Fill Table === Pots / Knobs === * [[http://www.alps.com/prod/info/E/HTML/Potentiometer/RotaryPotentiometers/RK11K11/RK11K11_list.html|Alps RK11K Series]] * [[https://www.thonk.co.uk/shop/alpha-9mm-pots/|Alpha Pots @ Thonk]] * [[where_to_order_components#knobs|Knobs Suppliers]] * FIXME need special 4gang 50KB potentiometers for a STEREO Resonance (stereo filter, one UI) * FIXME need special 4gang xxKB (50?) potis for a Stereo DRY/WET Mix * FIXME need special 2gang xxKB (50?) potis for EFX Send Mix Stereo * FIXME need special 2gang 50KA potis for CUT-OFF Stereo * FIXME need special 2gang Post Transformator Potentiometer (Value have to look in my prototype which is used) ^ Value ^ Type ^ Qty ^ |5K |Linear |x | |10K |Linear |x | |50K |Linear |x | |50K |Logarithmic |x | |100K |Linear |x | |1M |Linear |x | |2M? |Linear |x | |Knobs |Soft/Plastic/Alu|x | ==== 2. Analog Parts Listing ==== === VCA-VCF-Board === FIXME Fill Table ==== 3.Footprint Making in KiCAD ==== * ALPS Pots * Alpha Pots * 3,5mm Jack * Switch * Momentary Switch * 7 Segment LED Display * OLED DIsplay * Rotary Encoder FIXME have to be done ==== 4. Schematics in KiCAD ==== FIXME have to be done ==== 5.PCB Making In Kicad ==== === PCB Making Order === - BRAIN PCBs:\\ a.Left-Brain\\ b.Right-Brain\\ - LRE8x2CS - is a generic PCB which i already have (fairlightiiś)\\ - BREAKOUT PCBs (maybe have to sandwitch because of shiftregisters and less space)\\ - FILTER PCBs (have to sandwitch)\\
