Music-Machine

Step sequencer / synthesizer with real time access for playability

Hardware:

• Keypad for pattern editing
• 2nd keypad for quick access to utilities
• Six mode buttons for quick editing
• Dedicated play control buttons
• LCD display with 4 encoders
• Teensy 3.6

Features:

• 16 patterns, up to 16 steps each
• 2 sets of buffers
• Single / multi step edit
• Queue up realtime edits during playback
• Step selection shortcuts
• Joystick for realtime 2d control
• Swing
• Synth engine with parameter editing
• MIDI out
• Song edit (in progress)
• SD storage

To Address

• Chain edit
• Midi
• Joystick

Buffer Mechanics

Each pattern has a "root" and an "edit" buffer. Changing something on the root copies the changed version into the edit buffer. Changes to the edit buffer accumulate in the edit buffer. Using the Pattern Mode Button, root and edit buffer can be swapped, edits can be committed to the root, and edits can be saved to the root of another pattern. Saving to SD card saves all the edit buffers to become roots.

Encoder Functions

4 encoders under the LCD display:

Common functions: Pitch for selected steps, Duration for selected steps, Swing (global), Tempo (global)

Other functions for synth edit

Play Control Buttons

PLAYBUTTON Start / stop play

REWINDBUTTON Rewind, (hold:) Save to SD, reset playback counter

SELECTBUTTON Cycle step selection: select no steps - select all steps - select current selection | Also: confirm actions

Main Buttons and Their Modes

PATTERNMODEBUTTON

pattern_select 
    Pick a pattern using right keypad
    Press the button again to toggle between pattern root and edit buffer.
    (Hold:) commit current pattern edit buffer to current pattern

pattern_save
    Pick a pattern to capture edits from current buffer to

chain_edit
    Chain edit / song mode
    
synth_edit
    Synth patch choice & editing

MUTEMODEBUTTON

step_mute
    Select steps to mute
    
step_hold
    Select steps to mark as hold

STEPEDITMODEBUTTON

step_edit
    Select steps to edit pitch, duration
    Selection is sticky
    
track_select
    Select which track to direct current realtime edits to

track_mute
    Select tracks to mute

(Hold:) reset Trellis (keypad) display

ACCENTEDITMODEBUTTON

accent_edit
    Select steps to accent

LENGTHEDITMODEBUTTON

length_edit
    Select a step to mark the pattern length

PATHEDITMODEBUTTON

path_select
    Select a playback path for the pattern

Left Keypad Keys

Top Row

SAVETOSDBUTTON Save mem to SD

SYNTHEDITBUTTON Enter synth editing | (hold:) commit current synth edits to current synth patch

QUEUEBUTTON Start to queue realtime edits

QUEUEPRIMEBUTTON Arm queued edits

2nd Row

NORMALSPEEDBUTTON, DOUBLESPEEDBUTTON, TRIPLESPEEDBUTTON, QUADSPEEDBUTTON

Change playback speed multiplier

3rd Row

LOWPROBBUTTON, MEDPROBBUTTON, HIGHPROPBBUTTON, FULLPROBBUTTON

Change probability of selected steps

4th Row

ONETICKBUTTON, TWOTICKBUTTON, THREETICKBUTTON, FOURTICKBUTTON

Change racheting of selected steps