2. interface overview
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the OP-Z interface can be divided into different sections for easy reading and intuitive workflow.
all the main sections are listed above, with links to their own chapters below.
click on a section to find out more about its use and operation.
the OP-Z app is covered in a chapter of its own.
2.1 index buttons
the four index buttons are central for operating your OP-Z. they have a lot of usage and are presented below, with links to each individual chapter for detailed information. generally press and hold the buttons to toggle their unique temporary context for the interface.
2.2 color dials
turning the color dials is the main way to control the parameters of OP-Z. there are four color coded endless dials which are often used in combinations with other buttons. 
generally there are four different pages for these dials, allowing each dial to control a number of settings. read more about the color dials and parameter pages here.
2.3 parameter leds
the led next to each dial is  used to show the value of the corresponding dial, in any of the following ways:
a gradual min – max level, where led brightness represent dial value.
  • a gradual min – max level, with a default / neutral / mid green state at 50 %.
  • through different color segments, for toggled static values.
    2.4 parameter pages
    each track can have up to four pages of parameters.each page is color coded so you always know what you're controlling.
    learning these colors will help you to navigate the interface and to find the setting you want.
    press and release shift to toggle parameter page.
    see chart for
    detailed info
    2.5 track select button
    use the track select button or just 'track' to select which track is active.
    press and hold track and press any of the track buttons to select that track.
    the currently selected track is indicated by a white led when track is held.
    2.6 tracks / patterns / step buttons
    the top row buttons act both as track buttons, as pattern select buttons and as steps in the sequencer.
    the functionality depend on what button combination you are pressing.
    holding project will allow you to select patterns, while holding track will allow you to select track.
    pressing them alone will place a trigger on a step in the sequencer.
    2.7 record button
    2.8 transport buttons
    X2
    play
    press play to start playback from the start of the active pattern. while playing you can press play to restart playback.
    stop
    press stop while the sequencer is playing to stop playback.
    panic
    press stop while sequencer is stopped to end all active notes. 
    super panic
    pressing stop twice while sequencer is stopped will also clear all audio buffers.
    2.9 musical keyboard
    OP-Z features a two octave musical keyboard, used for playing and programming the unit. use the piano keys to trigger and play sounds from the currently selected track.
    the keyboard and its piano keys can be divided into two sections. the black keys are also called value keys,
    and the white keys are also called component keys.
    2.10 transpose buttons
    change octave
    press – or + to transpose the musical keyboard, and change the current octave, visualized by the value keys.
    offset track
    press and hold track together with
    – or + to shift all notes on the active track one step left or right.
    offset steps / micro timing
    press and hold a step and repeatedly press – or + to shift timing of that step, 1 tick back or forth, visualized by a purple led next to the active step. each step has a resolution of 24 ticks.
    pro-tip: the more purple the led, the further the trigger is from step center.
    2.11 shift button
    the shift button is often used in combination with other buttons. there is a difference between holdingand momentarily pressing shift.
    next parameter page
    press and release shift to toggle parameter page, indicated by different color parameter leds.
    add punch-in effects
    press and hold shift and the piano keys to momentarily add punch-in effects on the active track. 
    pro-tip: use shift combined with the color dials for temporary tweaking of a parameter. release shift to revert back to previous setting. this is great when live jamming!
    2.12 pitch bend
    applying pressure to the pitch bend control will allow you to gradually change pitch of the current selected audio track.
    you can also use it on the tape track and master track.
    pro-tip: try using pitch bend on the tape track to add a live tape stop effect.
    pro-tip: holding a lit step and using the pitch bend lets you modify the velocity for that step.
    2.13 microphone
    2.14 speaker
    the built-in speaker on OP-Z is used to play the startup sound, and to play the main sound, if no headphones or speakers are connected in the line out.
    control the volume of the built in speaker using the main volume knob.