The heart of Gem is a 12 bit Linear Frequency Shift Register (LFSR)

The 12 points represent a binary number which is then scaled to create a note value

Every step rotates the binary sequence by 1, changing the note output

The sequence can be played either every step or as a euclidean pattern

GEM CONTROLS

• Rate_of_Change: Controls the probability of one of the 12 bits being changed. Clockwise = higher probability
• Velocity: Controls how the output of the LFSR – the 12 bit sequence – affects the velocity output values… Is magic therefore unpredictable
• Clock: Sets clock pulse rate as a division of Live’s tempo
• Clock_Divider: Divides the master clock for even slower clock pulses – by up to 128 times…
• Clock_Swing: Old school 50-75% swing
  • Delays every second clock pulse
• Trig: When the button is GREEN a note is triggered every step
  • When the button is RED notes are triggered based on the Euclidean Trigger Sequencer in the central display
  • >_<: RED = Forwards. GREEN = Backwards
• Sequence_Steps: Works like a reset control
  • Values over 12 are wrapped around (modulo)
• Sequence_Fill: A classic euclidean Fill algorithm – spreads the ‘Hits’ as evenly as possible
• Sequence_Start: he step the sequence starts from
• Scale: Selects the Musical Scale for the Scale Scan Module to scan through.
  • This is not a quantizer
• Scale_Root: Sets the root note of the chosen scale
• Pitch_Min: Selects lowest note played irrespective of Root
• Pitch_Max: Selects highest note played
  • In semitones above Range_Min 
  • When Range_Min is changed Range_Max will follow – keeping the interval constant
• Transpose_Sequence: Draw a pattern of pitches onto the panel
  • -11 to +11 MIDI Notes
  • The value output by this sequence will be added to the value output by the Binary Note Sequencer
• Transpose_Sequence_Length: Sets the length of the Transpose Sequence
• Transpose_Sequence_Clock_Divider: Sets the clock division fos the Transpose Sequence
• Transpose_Sequence_On/Off: GREEN = Transpose Sequence ON
• ASR_1, 2 & 3: For polyphonic use
  • Works like an ‘Analogue Shift Register’
  • Any value above 0 activates the relative ASR which Offsets (delays) a duplicate note sequence by the set value – in Note Triggers