SignalScope turns your iOS device into a powerful real-time spectrum analyzer and oscilloscope. Easily measure audible frequencies in SignalScope’s FFT analyzer. “Touch” your data with highly interactive, multi-touch enabled analyzer displays. See http://youtube.com/faberast for video demos.

Input signals can be acquired from the built-in accelerometer, or from the current audio input path (iOS automatically selects the audio input path according to which external audio devices, if any, are connected to your device).

NOTE: The built-in and headset microphones of all recent iOS device models pass through a high-pass filter which significantly attenuates low-frequency signal content.

For iPhone/iPod touch audio I/O compatibility and frequency response measurements, visit http://blog.FaberAcoustical.com.

FEATURES
- Analyze signals coming from the iPhone's built-in or headset microphone, or from the built-in accelerometer.
- View real time analyzer displays on an external screen (supported on iPad only).
- Audio input is sampled at 48 kHz or 44.1 kHz, built-in accelerometer data is sampled at 100 Hz.
- Zoom in or out on spectrum and waveform displays with two-finger expand/pinch gestures, even while the analyzer is running.
- Pan vertically or horizontally in zoomed displays with two-finger scrolling.
- Pinpoint individual sample values or frequencies with a cursor.
- Save high-resolution spectrum or waveform display images as PDF files or as JPEG images in the iPhone's Camera Roll photo album.

SignalScope 3 supports full and partial upgrades to the additional tools and functionality offered in SignalScope Pro. Upgrades may be purchased via in-app purchase.

Available in-app purchase upgrades include:
- Full upgrade to the functionality of SignalScope Pro.
- Signal Generator tool (not the same as SignalSuite).
- - Random and periodic pseudorandom noise (period defined by FFT length)
- - White and pink noise weighting
- - Lin and log frequency sweeps
- - Tone generator
- Octave and 1/3-octave Analyzer tool (RTA).
- - Whole and 1/3-octave RTA (based on digital Butterworth bandpass filters)Fast, Slow, and Impulse response times
- - Flat, A, and C frequency weighting
- - Equivalent and time-weighted exponential average levels
- - Max, peak, and elapsed time also captured
- Level Meter tool.
- - Flat, A, and C frequency weighting
- - Equivalent and time-weighted exponential average levels
- - Max, peak, and elapsed time also captured
- Data acquisition (text and MAT file data capture) with downloading to Mac or PC via a standard web browser or iTunes File Sharing. Includes support for additional engineering units (V, A, g, ips), which are assignable to audio input channels.