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INTRODUCTION
Kastle v1.5 is a mini modular synthesizer with a headphone
output, 2 in/out ports for interfacing other gear and it runs
on just 3 AA batteries or USB power.
It is DIY friendly and ideal for beginners in modular
synthesis, but it will add some quite unique functionality to
any modular synthesizer system. It delivers the fun of
modular synthesis at a low cost and fits into your pocket so
you can play it everywhere!
Kastle has a unique digital lo-fi sound and it can be melodic
as well as very noisy and drony, soft or harsh. It is designed
to be fun on its own but it is most powerful when combined
with other modular gear.
Kastle is an open source DIY project which runs on two
ATtiny 85 chips that can be reprogrammed with an Arduino
(google: "programming ATtiny 85 with Arduino"). One chip
is dedicated to sound generation while the other one
handles modulation. Several firmwares for the Attiny chips
are available thru gitHub.
The v1.5 version combines a complex oscillator and LFO
with a stepped waveform generator.
The oscillator section has 3 sound parameters: PITCH,
TIMBRE and WAVESHAPE – all under voltage control and
with 6 di erent synthesis modes. It has a main output and a
secondary waveform output. Both can be used
independently or in combination.
The 3 synthesis modes available thru the main output are:
phase modulation, noise mode and track & hold
modulation.
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