UDO Super Gemini — Owner’s Manual
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OVERVIEW
The UDO Super Gemini is a 20-voice polyphonic, bi-timbral synthesizer
based on a hybrid of analog and digital technologies. By combining the
aesthetics and sonic character of vintage-era classics with state-of-the-art
synthesis technology, it was designed to be flexible, powerful and, above
all,
immediate
– providing you with gorgeous sound times two!
DDS Oscillators
Direct Digital Synthesis is the signal generation method employed by both
oscillator cores of the Super Gemini. At its centre is a clock signal running
three orders of magnitude higher than typical audio sample rates. This
clock increments a counter through thousands of indices in your chosen
waveform, generating samples once every 20-billionths of a second and
interpolating between them.
Each numerically controlled oscillator then uses its own DAC, also running
at the same high sample rate, to convert the samples to analog voltages
before being filtered by a preliminary analog low-pass filtering stage.
The extremely high sample-rate to output-frequency ratio provides
DDS oscillators with the advantage of superior phase precision and
natural-sounding frequency modulation. Importantly, it also allows us to
avoid using the severe band-limiting, or “anti-aliasing”, of typical lower-
frequency digital methods. This means our oscillators are easily capable
of generating frequency content far above the limits of the human auditory
system, as is the norm with analog oscillator synthesis.
Summary of Contents for SUPER GEMINI
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