Create standard test signals for your audio circuits
This signal uses a predefined set of frequencies (300Hz to 3150Hz) as specified by the ITU-T P.501 standard for telephony bands.
Generates white noise, with equal power spectral density across the entire frequency band.
Generates pink noise, with a power spectral density that decreases by 3dB per octave. It sounds more natural to the human ear.
Duration is determined by the text for TTS.