Question

4.16 LAB: Musical note frequencies On a piano, a key has a frequency, say f0. Each higher key (black or white) has a frequency of f0* r, where n is the distance (number of keys) from that key, and r is 2(1/12) Given an initial key frequency, output that frequency and the next 4 higher key frequencies. Output each floating-point value with two digits after the decimal point, which can be achieved as follows: print('%0.2f %.2f %0.2f %0.2f %.2f' % ( your_value1, your_value2, your_value3, your_value4, your_value5)) Ex: If the input is 440 (which is the A key near the middle of a piano keyboard), the output is: 440.00 466.16 493.88 523.25 554.37 Note: Use one statement to compute r 21/12) using the pow function (remember to import the math module). Then use that r in subsequent statements that use the formula fn fo* r with n being 1, 2, 3, and finally 4

Answer 1

r 2 * (1/12) Python 3.6.1 (default, Dec 2015, 13:05:11) GCC 4.8.21 on linux Enter start frequency: 440 440.00 466.16 493.88 523.25 554.37 start float (input ( ' Enter start frequency: ')) for i in range (5): i)), end ') print('%0.2f' % (start * (r print)

r = 2 ** (1/12)

start = float(input('Enter start frequency: '))

for i in range(5):
        print('%0.2f' % (start * (r ** i)), end= ' ')
print()

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