ARPIE expansion board to support sync to/from pulse clock devices such as Korg Volca seriesDesigned by Sixty Four Pixels in United Kingdom
Synctab fits snugly inside the ARPIE MIDI arpeggiator. It connects into the 6 pin "hack header" expansion port and adds two 3.5mm jack sockets to the side of the ARPIE. The synctab fits inside an un…Read More…
synctab fits snugly inside the ARPIE MIDI arpeggiator. It connects into the 6 pin "hack header" expansion port and adds two 3.5mm jack sockets to the side of the ARPIE.
The synctab fits inside an uncased ARPIE or inside the OLD style case (transparent plastic with overlapping top and bottom panels). It does not fit inside the NEW style case (black plastic with thick white plastic sides). To fit it in the old style case you will need to remove one of the side panels of the case
The input socket receives incoming pulse clock signals and relays them to the output socket. ARPIE can use this pulse clock to synchronise its internal clock, acting as a synch slave.
When there is no cable plugged into the input socket, ARPIE sends its own internal clock signal to the output socket, so it can act as a sync master.
synctab relies on the pulse clock features of ARPIE firmware version 4. It is not compatible with earlier firmware versions (but you can upgrade). It also requires you to have a version of the ARPIE hardware which includes the "hack-header" expansion port. This is a 6 way female header which you'll find directly below the "N" of the TRAN label.
As well as simply providing the sockets for clock connection, synctab includes a Schmitt trigger chip to help keep the incoming clock signal clean and jitter free. The chip also buffers the clock output and drives a pair of LEDs which blink in response to internal and external clock pulses respectively.
synctab is supplied as a kit and requires assembly by soldering.
To use synctab you need to
The pulse clock is expected to have the following characteristics
These match the clock signal of the Korg Volca range. Other clock polarity and rates can be supported but you'll need to change a couple of definitions in the code and recompile it.
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Wayne | June 8, 2018
Patrick | July 15, 2015
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