The developer calls this hybrid wavetable/waveshaping technique "polymorphing".Ĭall it what you like, it's powerful and flexible, and it gives Spire potential longevity. Spire can produce a vast number of tones depending on the wave and synthesis Mode you're using, as well as the various knob settings.
Here you can choose from 49 waveforms, including all the usual analogue suspects, plus various vocal, violin, piano, organ, synthetic and other unusual types. Things get really interesting when you get to the Wave menu. Note and Fine knobs set the pitch, and you can adjust the phase as well. When using FM Mode, the ctrl knobs alter pitch and mod frequency. With the Noise Mode selected, ctrlA acts as a filter cutoff control and ctrlB adjusts resonance.
"Spire can produce a vast number of tones depending on the wave and synthesis Mode you're using"įor example, in Classic Mode, turning ctrlA fully clockwise produces a square wave. The selected wave can then be modulated to varying degrees using the ctrlA and ctrlB knobs, which alter the waveforms in various ways, depending on the Mode selected. The former provides Classic, Noise, FM and AMSync options, each based on a particular type of sound: Classic, Noise, and FM are as you'd expect, and AMSync provides a nasal-sounding modulated wave based on oscillator sync and amplitude modulation. The sound of each oscillator is determined by a pair of drop-down menus: one for choosing the synthesis Mode, the other for selecting the sample-based waveform to be mixed with it.
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