Features:

Tone generator
Sweep generator
Multitone generator with 16 channels (real time)
White noise generator
Pink noise generator
Function generator
Program generator
Audio file generator with multi-channel mode up to 5.1
Ultrasound generator (on a 48KHz or 96KHz DAC)
User friendly interface
Runs in the background
Many examples ready to use

Extended Features:

Sweep tone generator (linear or logarithmic for musicians)
Rock solid double precision real time accurate wave generator (64-bit precision IEEE 754 floating point engine)
Real time manual frequency increment or decrement (accurate without pops and clicks)
Loops (continuous with no lag no clicks)
Amplitude modulation
16 tracks real time multi-tone generator
Save user configuration as a preset for future reuse.
Precise left/right channel volume control
Precise fade in and fade out time configuration
Possibility to invert one channel for cancellation effects.
Many many pre-programmed sound tests ready to be used by the sound professional

What you can do with this app:

Speaker tests
Fine tune an audio system
Create relaxation and meditations sounds
Noise mask
Sleep inducing with pink noise
Find your Tinnitus frequency.
Age hearing loss test.
Speaker cleaner: Remove water and dust from your phone speakers.
Learn many facts about sound
Your imagination is the limit!

PERMISSIONS:
No permission need !