Generate tones of specific frequency on mac command line

Question

I need to generate musical notes of a given frequency on the command line

Here is a list of the frequencies of notes http://www.phy.mtu.edu/~suits/notefreqs.html

Answer 1

$ say "do ray me fa so la te do"

lols.

Answer 2

SoX works really good for this purpose and it's available in brew:

$ brew install sox
$ play -n synth 3 sin 523.25

You can also save the sound to a file:

$ play -n out.wav synth 3 sin 523.25

Answer 3

It's simple, old and unmaintained but take a look at https://github.com/psycotica0/tone-generator

$ brew install sdl
$ git clone https://github.com/psycotica0/tone-generator.git
$ cd tone-generator && make
$ ./generator 2600 2