By Secret Base Design
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Demo Video: http://youtu.be/G29DOVl1fAo
This is the free version of Spectral Eye; we encourage you to try this app first, and if you want more features, you can upgrade to the pro version.
Spectral Eye analyzes incoming audio signals to extract the underlying frequencies. Most sounds are built up from a variety of sine waves; a simple whistle might be a single wave, while a guitar, piano, or the human voice have many waves added together.
By using a Fast Fourier Transform, sound can be decomposed into each frequency. Normally, this information is displayed on a chart, and there are number of excellent apps that do exactly this. Spectral Eye rearranges the FFT into a spiral, so that frequencies that are an octave apart are lined up as rays from the center of the display. The strength of each frequency is represented by the size of a red circle.
Play music, and Spectral Eye will reveal the frequencies. For a guitar, it's easy to see that in addition to the root frequency of a note, there are also a number of harmonic frequencies -- and these change based on the strings used, the pickups, and the amplification system. It's the frequencies present in the notes that make a Telecaster sound different from a Les Paul, and a piano different from a trumpet. Play an instrument, music from your iTunes library, or have it listen to whatever sounds are nearby -- the display is fun to watch.
If you're interested in understanding the nature of sound, use Spectral Eye to get a better view. The app was created as a utility used in the development in other Secret Base Design apps; we're making it freely available, because we found it to be useful, and thought others might like it too.
The app will remain free, and will not have ads. If you find it useful, we would very much appreciate a review in the app store, and you can get in touch with us through our support site, our Facebook page, or Twitter. Upgrading to the pro version adds more features, and helps us continue development of all of our apps.
Have fun with the app, and we hope you enjoy opening your Spectral Eye!
What's New in Version 1.3
iOS 7 update, and updated Audiobus library.
Pretty but not very useful.
No frequencies on chart. Graphs flash by in real time, way too quickly to see what range an instrument is using. Amplitude is size of dots, much harder to follow and less exact than bar graphs. It does not match concert pitch, which the authors point out. Without freqs and accurate notes, it's a toy. GREAT IDEA and fun to play with, but not a meaningful tool for mixing or production.
- Category: Music
- Updated: Jan 03, 2014
- Version: 1.3
- Size: 29.1 MB
- Language: English
- Seller: Patrick Madden
- © Secret Base Design
Compatibility: Requires iOS 6.1 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.