sig_tone
Generate a single sinusoid

Usage:

out = sig_tone(f, dur, fs);
out = sig_tone(f, dur, fs, ph);

`f`	Frequency (in Hz).
`dur`	Duration (in seconds).
`fs`	Sampling frequency (in Hz).
`ph`	Optional starting phase of the sine (in degrees). Default: 0 degrees, i.e., a sine.

out

Output signal, i.e., the tone.

sig_tone(..) generates a tone consisting of a single sinusoid with the frequency f, duration dur, and starting phase ph.