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====== clk2a2clk ======
Midiclock 2 Audio Converter, Audio 2 Midiclock Converter\\
4 Recording a Midiclock on a Audio-Track on your Multitrack-Recording-Device\\
in order to get the possibility to overdub a sequencer track on Recording Devices without Midi-Clock builtin\\

{{:phatline:Clk2aClk.jpg?1000|}}\\
{{youtube>qjcWe_V-kEI}}

{{:phatline:Clk2aClk-test-setup.jpg?1000|}}\\
===== Introduction =====
i use a zoom livetrack-l12, a multitrack-audio-recorder: compact design, severell submixes, parametric eqs, compressor, efx and a master-track-recording, a good price...\\
AND it doesnt have midi... it does not do midiclock.\\
so when i have to make a track new, or i want to overdub a track, a track that is Midiclock-Driven a sequencer track for example...\\
\\
So with this device, i lose one Audio-Track, because i use this one Audio-Track, as a Click-Track, it records Audio-Rectangle-Pulses, which are a converted Midiclock-Pulses\\
{{:phatline:Clk2aClk-signal-from-uC.jpg?1000|}}\\
when i then playback the Click-Track-Recording, it converts this Audio Pulses back to Midiclock-Messages. 
{{:phatline:Clk2aClk-signal-from-Recorder.jpg?1000|}}\\
Thats all, not much code, stripped down, running thight.

==== Features ====
- **convert Midi-Clock-Data to Audio-Pulses\\ 
- **convert Audio-Pulses to Midi-Clock-Data\\

====== Hardware Requirements ======
**External Requirement:**(for example)
  * Clock Source aka Sequencer: [[mididocs:midibox_seq_v4l]]\\
  * a Synth: JP8080\\
  * a Multitrack-Audio-Recorder: Zoom Livetrack L12\\
  * 3x Midi-Cables\\

{{:phatline:Clk2aClk-midibox.jpg?1000|}}\\
**Midibox:**\\ 
  * [[home:mbhp:module:core32]]\\
  * [[http://ucapps.de/mbhp_midi_io.html|1xMidi IO]]\\
  * Soldering Iron, Wires, PCB....\\
  * USB Power Supply
**Schmitt-Trigger:**\\ 
  * TS-274 OP-Amp\\
  * 14 Pin - DIP-Socket\\
  * Pin-Header 2x5Pins (to connect the PCB to Core J5A)(you will also need a cable 4 that)\\
  * Resistor R1  20K\\
  * Resistor R2  4K7\\
  * Resistor RFB 100K\\
  * Resistor for Output-Gain-Reduction 100K\\
  * 2x Electrolyt Capacitor 0,67uF (to decouple audio in and out)\\
  * Electrolyt Capacitor 10uF for Supply\\
  * Capacitor 100nF to denoise the OP-Amps-Rails...\\
  * 2 Audio Cables+Sockets for the connection to the Recorder (6,3 mono jacks)

===== on Protoboard =====
here i have made it all on protoboard:\\
{{youtube>9m22V8tvMXs}}\\
{{:phatline:clk2a2clk-proto-back.jpg?1000|}}\\
{{:phatline:clk2a2clk-proto-connect.jpg?1000|}}\\
{{:phatline:clk2a2clk-proto-shematic.jpg?1000|}}\\

====== Firmware =====
V1.2017{{:phatline:clk2a2clk.zip|}}
hardcodet no menue, no nothing, stripped down to max performance\\

====== How I Use It  -  built in Rack ======
{{:phatline:Clk2aClk-L12-switch-led.jpg?1000|}}\\
{{:phatline:Clk2aClk-L12-rack-solution.jpg?1000|}}\\
{{:phatline:Clk2aClk-L12-rack-back.jpg?1000|}}\\
{{:phatline:Clk2aClk-L12-rack-inside.jpg?1000|}}\\

===== Resources =====
[[http://pcbheaven.com/drcalculus/index.php?calc=st_nonsym_sp|Schmitt-Trigger-Calculator]]\\

====== Community users working on it ======
  * **[[Phatline]]** =  Programming, Documentation...\\

Just let a Private message on the forum to user already involved
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