MATRIXSYNTH: The K5 Additive Synthesizer Chip

Monday, February 15, 2016

The K5 Additive Synthesizer Chip

Published on Feb 15, 2016 Dr Korg

"Testing a single chip additive synth from"

Update: some details and pics via DSP Synth where you'll find links to order it. Note there are two versions of the chip.

"The K5 is a 5 sine oscillator in a 8-pin DIP.

1 analog pitch input CV for the fundamental. 1v/oct.
4 analog levels CV for level of the 4 overtones.

This is the synth that requires no filter for shaping. because you can modulate the harmonic content of the fundamental frequency.

$15 including shipping.

There is also a LFO version of the chip, the KL5 Harmonic LFO.
Same function but LFO-range of the fundamental frequency."

1 comment:

  1. With one of his nice DCO chips and an Arduino of some kind (Adafruit Trinket or Teensy), you basically have all of the power of the RCA Mark II ( for less than $50.

    I have the dsp-G1, hooked it up to a Trinket, and spent some time just staring at it, trying to figure out how those sounds were coming out of an 8-pin chip. In the old days, you could always make a voltage controlled square wave from a 555 Timer, but a midi-controlled DCO with low pass filter sweeps? Hard to believe all of that fits in an 8-pin chip until you have one sitting on a breadboard in your hand. And yes, I do understand the C code necessary to program an accumulator function, but all of that in an 8-pin chip is still kind of magic to me.

    If this isn't cool, cool is dead.

    On a side note, does anyone know what kinds of pots he is using with the breadboard in the videos? Those look much more secure on a breadboard than what I have been using.



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