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K4815

 // Pattern Generator

14p

playback by the corresponding number of semitones away from middle C.

When one of the patches from 65-128 are selected, notes received by the K4815 will trigger the start 

of playback at the beginning of the motion sequence. If you play legato, the notes will be transposed, 

but the motion will continue playing through to the end before repeating. If you play staccato, the 

motion will restart from the beginning for each note.

MIDI Controller Change

While in X/Y output mode, instead of transmitting MIDI notes, continuous controller messages will be 

sent. Controllers 16 and 17 correspond to the X and Y values of the playback ball respectively. The 

LARGE/SMALL switch  affects   the size of  the  output,  and   the MAJ/MIN  affects  the polarity   of the 

output voltages.

When MIDI controller 64 (damper pedal) is received the current playback direction is reversed just as 

with the analog DIR input.

MIDI SYSEX Messages

A series of SYSEX messages are used for software updating and loading new motions, patterns and 

scales. Currently this requires software from Kilpatrick Audio and will be sent to owners of the K4815 

who request additional or different features or require bug fixes. Please contact Kilpatrick Audio for 

more information if you would like to experiment with this feature.

User Manual

Hardware Version D/E
Firmware Version 1.1x
February 16, 2011
© 2010 Kilpatrick Audio

Summary of Contents for K4815

Page 1: ... K4815 Pattern Generator User Manual Hardware Version D E Firmware Version 1 1x February 16 2011 Kilpatrick Audio ...

Page 2: ...ve to advance our products for your benefit and enjoyment Features Eurorack form factor with 20HP width Musical note control and clock signals generated using unique methods 64 LED 8x8 multi brightness grid to show patterns and status Clock control via internal clock or external MIDI or analog clock Clock Direction and Reset inputs 0V 5V off on CV GATE or X Y analog outputs 5V to 5V range CV is 1V...

Page 3: ... free of charge parts and labour only please contact Kilpatrick Audio directly for more information The K4815 Pattern Generator supports both MIDI and control voltage gate clock signals To use the MIDI function requires the use of a MIDI adaptor such as the K1600 MIDI Converter But the K4815 can be used by itself without any MIDI devices by using the analog inputs and outputs If you are using the ...

Page 4: ......

Page 5: ... up to use the internal clock mode If no external clock is supplied the CLOCK INT EXT switch acts as a start stop control The CLOCK SPEED control affects the tempo when in internal clock mode The CLOCK LED pulsates once per beat Note that in internal clock mode the notes operate at 4x the clock rate 16th notes In the external mode this is adjustable as you will see later Make sure the CV GATE X Y ...

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Page 7: ... MIDI and analog clock at the same time may produce undesired results To prevent stuck notes in the case of external clock loss playing notes are automatically killed if no clock signals are received for 5 seconds This means that extremely slow tempos of less than 0 5bpm are not supported You might require caffeine if this is the tempo of your piece Using Internal Clock When using the internal clo...

Page 8: ... other uses of varying voltages The X output sends the horizontal position and the Y output sends the vertical position The MIDI output sends continuous controller CC messages for the X and Y positions also These are shown in the MIDI Implementation section of the manual Note that the outputs in X Y mode are stepped and if you want continually varying voltages you will need to pass them through a ...

Page 9: ... C D E F G A B C C D E F G A B C C D E F G A B C C D E F G A B C C D E F G A B C C D E F G A B C C D E F G A B C OUTPUT OFFSET Control In CV GATE mode the OUTPUT OFFSET control affects the transposition of the note outputs on CV and MIDI You can shift the notes up or down by semitones A full 10 octave range is possible In X Y mode the OUTPUT OFFSET control affects the DC offset of the X and Y sign...

Page 10: ...ON TYPE control affects how the playback ball moves around on the display Each motion type can have up to 64 steps Each of these steps can land on any position on the grid and positions can be visited twice so quite complex motions are possible not just sequential patterns There are 64 motion types which are selected by using the MOTION TYPE control Pressing on the control resets the motion playba...

Page 11: ...borators and contain simple linear motions as well as more complex motions Motions are up to 64 steps long but some are less than this based on the particular design concept Some are visually designed and others are musically designed taking into account the underlying scale notes to create melodic and arpeggiating patterns Random Motions In addition to the 48 preset motions there are also 16 rand...

Page 12: ... F A C Triad 32 C E G C Triads Up Down 33 E C C G Triads 34 F D A Triads 35 The Sound of Five 36 Slither 37 Mini Slither 38 Mini Slither 2 39 Crossing Over 40 Groove 1 41 Groove 2 42 Groove 3 43 Groove 4 44 Groove 5 45 Groove 6 46 Groove 7 47 Groove 8 48 Groove 9 49 Seeded Random Seconds 50 Seeded Random Thirds 51 Seeded Random Fifths 52 Seeded Random Row 1 53 Seeded Random Rows 1 and 2 54 Seeded ...

Page 13: ... circuitry Please see the Kilpatrick Audio website for free information about building your own MIDI interface MIDI Clock Support By sending MIDI clock to the machine while it is in external clock mode it is possible to synchronize the machine to an external MIDI sequencer or other clock source The input is divided by the CLOCK SPEED control just as with an analog clock input When running in any c...

Page 14: ...and 17 correspond to the X and Y values of the playback ball respectively The LARGE SMALL switch affects the size of the output and the MAJ MIN affects the polarity of the output voltages When MIDI controller 64 damper pedal is received the current playback direction is reversed just as with the analog DIR input MIDI SYSEX Messages A series of SYSEX messages are used for software updating and load...

Page 15: ...ut 100mA max Notes MIDI RX and TX use 5V TTL signal levels External MIDI interface circuitry is required MIDI RX is internally terminated to 5V with a 10K resistor X6 Power 1 12V input 2 12V input 3 GND 4 GND 5 GND 6 GND 7 GND 8 GND 9 12V input 10 12V input 11 N C 12 N C 13 N C 14 N C 15 N C 16 N C Support and Additional Information Please contact Kilpatrick Audio with additional questions about t...

Page 16: ...rol Change O 16 X output 17 Y output O 64 DIR input Prog Change True X 0 127 0 63 0 63 Upper bank has key trigger enabled System Exclusive O O During bootup for software update only System Song Position Common Song Select Tune Request O X X O X X System Clock Realtime Commands O O O X Aux Local On Off Messages All Notes Off Active Sensing System Reset X X X X X X X X Notes MIDI clock timeout is 5 ...

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