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Rob Hordijk Rungler: Difference between revisions
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dynamic timbral and volume control that can do e.g. a pretty solid bass line
<br><br>
<b>Dual Phaser </b><br>
Price: 385 Euro.<br>
The internal CV voltage scale is 1V/Oct. Each phaser has a reasonably accurate one volt per octave direct control input that can track the keyboard voltage. Normalization is used, routing the V/Oct input signal of phaser1 into phaser2 when the phaser2 V/Oct input is left unplugged.
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<b>Active Matrix</b><br>
Price
The Active Matrix module
input signals can be added to any one of eight outputs. By using ¼-inch tip-ring-sleeve insert
jacks for the matrix nodes (equal to stereo jacks) a whole range of applications become
possible. First the column input signal is buffered and then routed to the tips of the nodes in
that column. The ring signals of the nodes are basically summing inputs and summed to the
final output signals at the ends of the rows. By connecting a stereo jack where the tip and the
ring are connected directly together, a connection with unity gain is made from a column
input to a row output. If the tip-ring connection in the jack goes through a resistor an
additional attenuation can be accomplished. E.g. a 30k resistor will attenuate by 6dB and a
91k resistor by 12dB.
When a stereo audio cable is soldered to a jack plug and on the other side of the cable a
potentiometer is attached the potentiometer will act like a pot on the node, enabling to set the
mix level by the pot. Basically each node is an insert, just like the inserts on a mixing desk.
And can thus be used in the same way. So, using a jack with a pot means to ‘insert’ the pot
into the signal path. This means that you can insert any other outside world device in the
signal path by using an insert cable with a stereo jack on one side and two mono jacks on the
other, provided signal levels match of course (e.g. 5V pp oscillator output signals will
severely overload line level inputs on e.g. a digital effects rack or the guitar input of a
stompbox). One could also connect a resistive sensor like a light dependent resistor (LDR) to
a jack and make the node light sensitive.
Each column also acts like a multiple. When a mono jack is connected into a node it will pick
up the column input signal from the tip. But the ring input is now short circuited to the ground
through the sleeve of the mono jack and will so disable any input from this particular node to
the row output. This will not interfere with any other nodes in the same column or row,
because of the full buffering of both the column inputs and row outputs. So, any node that is
not used to route a signal to a row output can be used as a multiple output. Meaning that the
matrix is also eight multiples with one buffered input and eight buffered outputs on each
multiple.
Matrices with bigger sizes can be built on demand. Input columns come in multiples of eight
and any number of output rows are possible.
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