Spectrum Analyzer is a music visualization tool. You can visualize sound coming from phone's microphone in variety of shapes and effects.
Features:
- 18 predefined presets!
- Ability to load your own photos (make sure to select Blending mode to "Texture")
- Sensitivity can be adjusted
- Dark and light UI theme
- 8 basic preset types
- Over 16 different effects
- Custom shaders (for advanced users)
- Adjustable quality, for older phones

Check out also Spectrum Analyzer PRO. It is ad-free and has the ability to import/export your presets.

Note: If you experience slow performance, try to lower the quality of the preset.