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clock2audio2clock

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



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

when i then playback the Click-Track-Recording, it converts this Audio Pulses back to Midiclock-Messages.
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: midibox_seq_v4l
  • a Synth: JP8080
  • a Multitrack-Audio-Recorder: Zoom Livetrack L12
  • 3x Midi-Cables

Shematic


Building FABRICATED PCB

for DIY on Protoboard - see below “Building DIY”
The Design is optimized for Pick and Place most SMD Parts are on the Back-PCB
i ordered 5 PCBs from JLCPCP with almost all SMD Parts (except Thruholes and the PTC) presoldered
now waiting for Presoldered PCBs

arg… Jacks to near by… FIXME

BOM

ValueDesignatorFootprintLCSC Part NumberLibrary-TypeMouser
47uFC1,C2,C3,C4midibox:1206-CC96123basic
100nFC5,C6,C7midibox:1206-CC24497basic
220nFC8midibox:1206-CC1857basic
1N4148WD1midibox:SOD123-DIODEC81598basic
LED-YellowD2,D3midibox:0603-LEDC72038basic
BootLoadJ1midibox:Header-1×2
DebugJ2midibox:Header-1×2
Int.SwJ3midibox:Header-1×2
Header-1×3J4midibox:Header-1×3
Midi-DIN-5-Socket_RXJ5midibox:Midi-DIN5-MAB5SH806-KCDX-5S-S2
Midi-DIN-5-Socket_TXJ6,J7midibox:Midi-DIN5-MAB5SH806-KCDX-5S-S2
3.5JackJ8,J9,J10midibox:35JACK-CUI_SJ1-3535NG-PI490-SJ1-3535NG
CV1JAUT1midibox:Header-1×2
Mounting-HoleM0,M1,M2,M3,M4midibox:Mounting-Hole-M3
PTCPTC1midibox:1206-RC126818extended576-1206L150THWR
4K7Rb1,R1,R2,R3midibox:1206-RC17936basic
1KR4midibox:1206-RC4410basic
220R7,R8,R9,R10,R11,R12,R13,R14midibox:1206-RC17958basic
10KRa1,Ra2,R5,R6midibox:1206-RC17902basic
100KRf1,Rf15midibox:1206-RC17900basic
DIPCOREF4_52PU1dipcore-V2C:dipCoreF4_v2c-52p-DIP-40-CMPNT_CORE_52P@Antichambre
6N138U2midibox:DIP-8512-6N138M
MCP6002U3midibox:SOP-8_SOIC-8C7377basic
mouse-cutcut1,cut2,cut3midibox:mouse-cut

Building DIY


Midibox:

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:





Firmware

V1.2017clk2a2clk.zip hardcodet no menue, no nothing, stripped down to max performance

How I Use It - built in Rack





Resources

Community users working on it

  • Phatline = Programming, Documentation…

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

clock2audio2clock.txt · Last modified: 2021/01/17 01:00 by phatline