Tiptop Z3000 Smzrt VCO - Manual (Page 5)

Frequency Mode. - Frequency Ratios
WhenmultipleVCOsarecombinedinapatch,either
modulatingeachother,modulatingothermodules,or
simplyhavingtheirwaveformsmixedtogether,
frequencyratiosarepracticaltoolsforaudiosynthesis.
VCOsworkingtogethercreateovertones.Thesecanbe
generallypleasanttotheear(harmonic)orabrasive
(inharmonicordissonant).
Harmonicovertonescomefrommathematicallyeven
frequencyintervals.Forexample,ifoneVCOissetto
300Hz,thenthesecondVCOshouldbesettoan
evenmultipleorfraction:
75hz,150Hz,300Hz,600Hz,1200Hz,2400Hz,etc.
Inharmonicovertonescanbecreatedbyaddingor
subtractingaconstantnumber(75,inthiscase)from
thefundamentalfrequency:
75Hz,150Hz,225Hz,300Hz,375Hz,etc.
MultiphonicsoundsarecreatedbyaddingathirdVCO
thatmatchesthesumofthefrequenciesofthefirst
two.Forexample:
IfVCO1=75HzandVCO2=150Hz
SetVCO3=225hz(150+75)
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