Spectroid

By Carl Reinke

Spectroid

Spectroid is a real-time audio spectrum analyzer with affordable frequency decision throughout the the entire frequency spectrum.

FAQ

Q: Why are the dB values negative?

A: Spectroid uses dBFS (Full Scale) where 0 dB is the utmost power that the microphone can measure, so the decibel values are negative because the measured power is less than the utmost power.

Q: Can I zoom in on the spectrum plot?

A: Yes, do a two-finger pinch-to-zoom gesture.

Q: Why are there discontinuities/gaps within the spectrum plot and waterfall?

A: Spectroid uses multiple FFTs overlapped in frequency so as to present higher frequency resolution at decrease frequencies than a single FFT. The caveat of this technique is varied impulse response and minor discontinuities in frequency. The upside is that it might possibly efficiently produce a spectrum that better matches the frequency decision of human audio perception. It's nonetheless in all probability not pretty a lot as good as your ears though!

Q: Can I export the spectrum data?

A: Spectroid would not make your device a calibrated instrument. If you want the spectrum knowledge then you must be using an precise spectrum analyzer rather than an app in your mobile system.

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