Spectrogram

Galmiza

About this app

Spectrogram is a … spectrogram viewer which allows time frequency analysis.
-FFT resolution from 32 to 65536
-9 window algorithms to reduce spectrum leakage
-fast pause/resume button
-day or night mode

Note that amplitude value is not displayed because would cannot be accurate without calibration for your device.

Feel free to contribute to the development of the app:
https://bitbucket.org/galmiza/spectrogram-android

Ratings and reviews

Works very well overall. Using with VLF antenna to capture sounds on the go. Would be useful if there was an option for real time audio playback for those of us using this app as a real tool for more than mic input. Would be nice to get some mains hum FFT filtering too. Sitting out here with my antenna the app is great but not very useful without being able to hear the audio as well. Please add these features and I will give 5 star!

Not useful for linguists. The scale of the x axis is more than 10 seconds and you can't zoom in, meaning you won't get a useful look at any phenomena with timing on the order of milliseconds. Seems like it was designed for musicians, but it would be nice if it were usable for other things, too. The ability to record a short token and zoom in on the spectrogram in one- or even half-second increments would be ideal.

the log scale measurements are glitching for me (which is required to see any low frequencies) Other than that, simple and straightforward with everything I need. 5 stars if that can be fixed

What's new

Corrected audio wave rendering. The time view frame represents the signal sample being processed by FFT. Its duration is given by "frame length".