FrequenSee - Spectrum Analyzer

Daniel Bach

About this app

See your voice, music or test your audio equipment. See whatever your microphone can hear!

This real-time spectrum analyzer (RTA) / audio visualizer features:
- 176 high-quality frequency bands [20Hz to 22kHz]
- Logarithmic frequency scale to match human perception
- Low latency for high responsiveness
- High frame rate to see smooth frequency and amplitude movements
- Low battery drain due to high performance native code
- Fast graphics using OpenGL ES 2.0
- FFT window size 4096 @ 60 frames per second

Ratings and reviews

I love this app! I keep it running and setting a few feet in front of me any time I'm listening to my system, which is pretty much daily. Besides the very musical dance it does, I use it to evaluate the upgrades I'm routinely doing. You get used to how it responds to particular songs without even being aware of it until you change something like an amplifier. It's nice to see what I think I can hear. Much appreciation to its creator. Nice job.

This is the one! Responsive, accurate for the purpose, excellent display. No frills, it just does what it should. Invaluable for hunting feedback in audio reinforcement (PA) systems. It's always with you and it's free. Ads are unobtrusive. Thanks Daniel!

I put some time into testing a bunch of these audio frequency and decibel apps using 4 different devices and none were able to do anything even close to what real spectrum analyzer was showing! Each device showed a completely incorrect reading. I couldn't even get any apps to match any other apps readings on the same device with them both running at the same time with pink noise sent from real RTA. Incredibly useless, use this to tune a stereo and you'll be wondering what happened to it.

What's new

- added Android 13 support
- removed ads
- improved audio processing, now using unprocessed float audio input
- some coordinate system changes