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generates an 8-step pattern. When it is high (or connected 
to “+” patchpoint), it keeps generating a random pattern 
and when it is altering, it generates a semi-random pattern. 
The PATTERN output is useful for modulating every single 
parameter of the Kastle synth or any external device with 
the I/O port.

For rungler nerds only:

The PATTERN voltage is based on the current state of 
3 bits of internal binary 8 bit shift register. The shift register 
is shifted with every new voltage generated. When this 
happens - based on the signal at the FEED socket - the 
new bit arriving to the shift register remains the same 
(FEED is low), is inverted (FEED is not connected) or is 
generated randomly (FEED is high). 

13 CLK IN

The CLK IN resets the phase of the TEMPO oscillator to the 
highest point of the triangle and then the triangle begins 
to fall. This is very useful for creating complex modulation 
curves or for synchronising with external clock. When 
TEMPO is set much slower than clock at the CLK IN, the 
TEMPO oscillator becomes independent and the CLK IN 
only triggers the PATTERN generator. This way the LFO 
could still be used to modulate at slow rates.

14 INPUT / OUTPUT 

The I/O CV port enables you to connect up to 2 modulation/
audio/clock signals from Kastle to external gear, or to 
connect any external signal to modulate the Kastle. The 
signals are output with a stereo jack and the patch points 
L and R connect either to the left or right channel. To use 
both channels with a modular synth, you can use stereo 
to mono splitter adapter or you can just use one channel 
(L) with a  mono cable connected to the I/O  jack. When 
connecting external modulation to Kastle please note that 
the signal will be rectified and Kastle will respond to 0-5V 
signals only.

Summary of Contents for KASTLE DRUM

Page 1: ...KASTLE DRUM BASTL INSTRUMENTS...

Page 2: ...y The built in VC clock generator with a stepped pattern sequencer can either run on its own or it can be synchronized to analog clock while retaining the triangle LFO for parameter modulation The Kas...

Page 3: ...battery operation or USB power selectable by a switch open source durable black gold PCB enclosure What s in the box Kastle synthesizer 10 patch cables sticker for environmental reasons we are exclud...

Page 4: ...position based on which power source you are using There is a LED close to the TEMPO knob which should light up If it doesn t it means the USB socket is not powered or you connected the batteries in...

Page 5: ...1 DRUM MOD DRUM MOD DRUM MOD DRUM DRUM DRUM Making Drum Beat PATTERN 3 PITCH Turn the PITCH knob to adjust the PITCH of the main drum synthesis A modulation signal can be connected to the PITCH MOD so...

Page 6: ...n will increase the decay time but only resulting in amplitude modulation and no pitch modulation 5 TRIGG IN The TRIG IN will trigger the envelope with varying intensity based on how much change in vo...

Page 7: ...ements resulting in an attack envelope shape 6 DRUMS This patch point can be used as another signal for your patch When any other output is connected to this output it will be passively mixed with the...

Page 8: ...knob sets the amount of the modulation This is especially useful when creating more complex modulation curves 10 LFO The LFO socket outputs triangle waveform but it can be altered by modulating TEMPO...

Page 9: ...nt of the triangle and then the triangle begins to fall This is very useful for creating complex modulation curves or for synchronising with external clock When TEMPO is set much slower than clock at...

Page 10: ...www bastl instruments com more info and video tutorials...

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