Back to Home

AndroSpectro Lite

Supplied By AndroiDSP    On Jan. 13, 2012    Comments(24)

APP for iPhone AndroSpectro Lite version1.41 Download

Create a visual image from the sounds around you.

Free Version Features:
* Multi-Touch Zoom/Pan * Display up to 3 minutes of continuous recording * Save as Image * Load previously saved Images * Change Spectrogram Colors * Easy Auto-Level / Max-level
Paid Version Features:
* Set Sampling Frequency/Window Size/Window Type * Show dB/Amplitude * Spectrogram smoothing * Export data to Matlab

What is a Spectrogram?
Every signal is a combination of unique frequencies, and can be disassembled into its frequency components. ("Frequency Spectrum")
A Spectrogram is a technique that is used in Audio Analysis (Spectral Analysis) to see the real-time behaviors of signals. It plots the frequency components of the signal over time.
The bar on the left shows the frequency (in [Hz]) and the color is the intensity of that frequency.

Why AndroSpectro?
For non-techies - AndroSpectro is the simplest spectrogram app available. Just press the "Play" button. Feel free to Zoom-in/Pan using multi-touch gestures. You can also easily set the Maximum level or press 'auto' for auto-leveling.

For techies - AndroSpectro gives you control over every parameter you can think of. Display up to 3 minutes of continuous recording history and save as an image for later viewing.

For mega-geeks - Export the raw Spectrogram data to Matlab for further analysis. Your phone becomes your handheld input device for advanced audio analysis. (We wish we had it as a student)
Goto for more info

Please give us feedback so we can improve the app!
The AndroSpectro team

PS: The application uses permissions to track anonymous usage statistics. These are used to track bugs and improve your experience.

AndroiDSP part of our Music & Audio and have average installs from 10000 to 50000. Last Update Jan. 13, 2012. Appstore play rating is 83.3567. Current verison is 1.41. Actual size 932.0 KB.

What's new

    * Much faster load time
    * Now supports real-time(!) orientation changes (Portrait/Landscape)
    * Share Spectrogram image via email
    If you are experiencing problems with the app, please contact us at or send feedback from within the application. Thanks!
Download androspectro-lite.apk 932.0 KB


Bioacoustician here. Pretty disappointed. To be clear I bought the paid version. I work with spectrograms nearly every day, using various Adobe products for spectrographic editing and other audio analyzers made by Cornell U (Raven Pro/Lite) in researching the vocal lives of animals. This application 'could' offer real in-the-field usability for me and was hoping this product would deliver. My problems came mostly from the terrible resolution I got playing will all possible combinations of various settings (NFFT and window size, smoothing) in trying to get a clear or more detailed image of bird vocalizations in various instances. The produced spectrograms were so grainy and un-scalable no kind of finer detail in bird song could be discerned from the spects, unlike its iPhone counterpart simply named "Spectrogram". I don't know what generator engine Apple's spect app uses, but it's far superior. I really wanted this app to be as good for use on my new phone. For low-pitched human voices this app might be acceptable, but for higher pitched bird songs it surely is not.

Simple, perfect Controls are intuitive. No clutter. Wonderful app.

Simply Awesome I'm an Audio DSP student and this is perfect for me. I think I'll even go for the pro version. Definitely worth $4!!

Very nice demo. Very nice little program, function limited because demo. Permissions explained in the description, perfectly reasonable. Not spyware!

Thieves Why the hell would this app need to know who I call my contact's ect this app spys on there customers and sells your info to anyone

Crashed Didn't even open properly before crashing. Going to the settings killed it. Restarting doesn't work, it just opens up where you last left it which was when it was crashing.

Very cool! Just what I was looking for. Plan to get the full version soon!

FREEZE!!! Downloaded it tried to start it a few times and it just freezes every time. Uninstalling so glad I never bought the paid version

Excellent The most useful app for an Electronics and Commumication Engineer like me. Thanx.

Failed on first run Selected Settings and it hung. Tried multiple times. Uninstalled. Moto RAZR HD

Works great on tablet Looks great on my galaxy tab

Nice app, loved it...

Too High Permissions! (Spyware?) I can't imagine why this app need permissions to: a) Read phone state and identity, b) Full internet connectivity, other than containing ads/spyware,so please explain yourselves! Otherwise seem like a nice app BUT missing all sensitivity, scale and velocity settings! Will upgrade review when you improve and explain permissions.

Great for DSP I'm an engineer and i use it daily!

Great App Does exactly what it stats. Tried it Aphex Twin - "windowlicker" song.. and got the picture !!! I'm going to try the pro version as well.

Loved it!! Great app, keep up the good work

Works great Works great. Very responsive.

Easy to use Ultra responsive and very intuitive. I tested it with my guitar and it seems very accurate. The zoom in really helps :-)

Nice features for a free app The blue colors rock! How do i export to matlab?

Good for kids Nice app. I spent an hour with my kid teaching him about sound waves Well done

Best free spectrogram app I love the multi touch zoom! Also that I can save the spectrogram as an image Keep up the good work!

Good except... Too many limitationsnfor the free version, and the paid version doesn't allow Logarithmic scale... Worthless, you can't read anything with a linear scale...

Nikki I don't have this app. But asked them about developing another app, and just had to give a review on their customer service replying back. All I can say is They should have 10 Stars for that!!! You guys are Awesome!

Nice app. Occasionally useful.