Free Signal / Tone / Frequency Generator Features - Multiple waveforms - Smooth amplitude and frequency control - Background operation - Output via audio jack - Frequency range configurable via settings page Waveforms - Sine - Triangle - Sawtooth - Square - Noise To change the range of the frequency slider, press the settings button at the top-right corner.</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br>