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Frequency mode. - frequency ratios – Tiptop Z3000 Smzrt VCO User Manual

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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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