Technical Numeracy Flashcards
What does the graph of a waveform show?
How the displacement changes over time
What is a logarithmic scale used to represent?
Orders of magnitude as a linear change
The decibel scale and the frequency values on filter or EQ are examples of what kind of scale?
Logarithmic
Why does the decibel use a logarithmic scale?
Because our ears don’t respond to sound pressure in a linear way
What will we hear louder: sounds with a consistently high level, or sounds with a loud peak but no sustained volume?
Sounds with a consistently high level
What is frequency?
The number of waveform cycles per second
What is the period of an oscillation?
The amount of time a single cycle takes
How do you calculate the frequency F from the Period T?
F = 1/T
How do you calculate the period T from the frequency F?
T = 1/F
How do you calculate the frequency of an octave higher than a given frequency?
The octave higher is always double the frequency of the original
How do you calculate the frequency of an octave lower than a given frequency?
The octave lower is always half the frequency of the original
How do you calculate the frequency of a perfect 5th higher than a given frequency?
It is the mid-point between the original and an octave higher
How do you calculate the frequency of a perfect 4th lower than a given frequency?
It is half the frequency of the perfect 5th above
What is the formula for harmonic frequency?
Fundamental frequency x number of harmonic
How would you calculate delay time of a given BPM?
60/BPM
