Sample Rate
Loquelic Iteritas uses a unique multisampling technique to make aliasing
more musical. By choosing a particular sample rate for a waveform that has a
harmonic structure (all overtones are integer multiples of the fundamental)
the alias power can be moved into frequencies that are also multiples of the
fundamental and therefore more musical.
is gets complicated when synthesizing two oscillators at different pitches
but using the same DAC. e compromise that Loquelic Iteritas makes is to
give up the notion of a xed sample rate and compute a time delay between
samples based on both oscillators. For the single oscillator case, this delay is
based entirely on pitch. If this delay is computed based on each oscillator's
pitch, both sample rates can be interleaved by checking which oscillator's
delay will be up rst. is oscillator is then updated to its next timestep and
an output value is computed based on both oscillator's output state. is
makes no guarantees about exactly where the aliasing goes. It is an attempt
to make the aliasing related in some way to the fundamental pitch.
Osc A
Osc B
Out
Two independent sample
rates combine to form
one irregular sample
rate. Sample rate is not
a constant.
Time
Noise Engineering
Loquelic Iteritas
Complex Digital Oscilator
8
