Tone Generator EX is an audio tone generator. It provides following features:
Frequency range from 20Hz to 22KHz.
Can play 4 different waveforms: Sine/Square/Sawtooth/Triangle
Playback running in background.
Playback can be controlled from the notification drawer, lock screen or headset button without having to reopen the APP.
Auto-pause on incoming call, alarm, etc.
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