a standalone MIDI step sequencer
First, install dependencies:
sudo apt-get install qt5-default libasound2-dev libjack-jackd2-dev g++
Then, clone the source code and initialize the submodule:
git clone https://github.com/chronopoulos/ziggurat
cd ziggurat
git submodule init && git submodule update
NOTE: If your version of libjack-jackd2-dev is older than 1.9.11, then you should comment out the line containing -DJACK_HAS_PORT_RENAME in ziggurat.pro
Finally, compile and run:
qmake
make
./bin/ziggurat
Ziggurat starts up with 3 empty groups, represented by the 3 rectangles near the top of the main window. To add a sequence, right-click on a group, choose "Add Sequence", choose a sequence name and length and click "OK".
Along the bottom of the window, you will find the Button-Row Editor, where you can enter notes by clicking on the buttons. The default note has MIDI value 60 (middle C) and velocity 100. To change this, mouse-wheel over the button; holding Shift will increase the rate of change. You can switch between editing note value or velocity using the dropdown menu in the Row Editor.
In the Transport section (middle-left), you can set the tempo, start, stop, and pause the sequencer. Hitting spacebar toggles start/stop. Each sequence has a set of parameters (Name, Tranpose, MIDI channel, etc.) which can be edited in the Config section (middle-right).
Sessions can be saved (Ctrl-S) to project files, which can later be re-opened (Ctrl-O). The file format is stadard JSON, with file extension *.zig