gen-freq-table

#!/usr/bin/env python3
#
# gen-freq-table - calculate and print the frequency table for use in beep(1) man page
# Copyright (C) 2018-2019 Hans Ulrich Niedermann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import math

n_list = range(-9, 3+1)

octave_list = range(3, 6+1)

freqs = [ [ (440*(2**(i-4))*math.exp(math.log(2)*n/12)) for i in octave_list ] for n in n_list ]

notes = [ "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B", "C" ]

print("""\
.TS
center box;
Cb | Cb s  s  s
Cb | Cb Cb Cb Cb
-  | -  -  -  -
C  | N  N  N  N.
note	octave
""", end="")

print("name\t", end="")
for octave in octave_list:
    print("%d\t" % octave, end="")
print()

for (note, freqline) in zip(notes,freqs):
    print("%s\t" % note, end="")
    for f in freqline:
        print("%d\t" % int(round(f)), end="")
    print()

print("""\
.TE
""", end="")