Pocket RTA - Spectrum Sound Analyser for the iPhone

Pocket RTA is a highly portable award winning real-time spectrum sound analyser for the iPhone.

 Pocket RTA has many advanced features which are normally only found in much more expensive sound analysis software, providing fast and accurate spectrum analysis suitable for both amateur hi-fi enthusiasts and professional A/V engineers. Uses include system calibration, monitoring of noise levels and testing of audio equipment.

PocketRTA samples sounds using either internal or external microphones and then applies a Fourier Transform to the samples to obtain a frequency spectrum. The result is an accurate representation of the sampled sound broken down into its frequency components.

Various display modes include, linear narrow band, logarithmic narrow band, Octave, 1/3 Octave, Oscilloscope, SPL and Spectrogram displays with ANSI A and C weighting curves. Use the iPhone's multi-touch interface to perform real-time magnification of displays. The touch screen allows selection of the nearest FFT point giving a display of it's frequency and decibel level. Up to 16 times oversampling allow more stable readings for fluctuating or unstable input signals whilst our unique noise cancellation system allows you to remove unwanted background noise.

PocketRTA features the ability to calibrate the display using a 1/3 Octave display in order to compensate for imperfections in frequency response of both internal and external microphones. The program automatically detects and switches between both sets of calibration data.

Pocket RTA has the ability to capture up to 3 input signals and overlay them as a reference over live input. All display modes allow exporting of graphed data to the camera roll in JPEG format. These images can then by synced to your desktop PC for better analysis.

Please Note: When using a 1st generation iPhone the internal microphone limits the sample rate to 8KHz. Using an external microphone or headset allows up to 44KHz sample rate. The iPhone 3G does not suffer this limitation.

Many great features including...
-Automatic Tilt Control for Portrait / Landscape displays.
-44.1KHz sampling rate for up to 22KHz measurements.
-Definable FFT frame sizes.
-Standard ANSI/IEC A and C weighting curves.
-Automatic noise cancellation.
-Automatic peak note / frequency and octave display.
-Root musical note detection and tuning.
-Narrow band Linear and Logarithmic scalable displays.
-Spectrograph display.
-Octave and 1/3 octave displays.
-SPL (Sound Pressure Level) display.
-10x zoom for accurate analysis of narrow band data.
-Internal Signal Generator (tone and pink noise).
-Touch screen display of nearest point with frequency and decibel readout.
-Up to 16x oversampling.
-Independent gain controls for both internal and external microphones.
-Pause facility freezes the live trace to aid analysis of data.
-Independent 1/3 Octave Calibration of internal and external microphones.
-Capture Buffers allow an additional 3 reference traces to be displayed.
-Camera Roll capture facility (640x480 graphing facility).
-Peak trace facility for better reading of fluctuating frequencies.
-Capture peaks over time facility.
-Comprehensive PDF help system.

Not Just an RTA
By: Schoon Man
Version: 1.0
Source:
This app has taken over for my day to day needs as a Live Sound Engineer... It's not only an RTA, but a SPL Meter, Oscilloscoope, and Spectrogram...

Fantastic
Source:
This thing rocks I wasn't expecting it to be as sensitive as it is, it even picks up whispers! It has so many options and the UI on this app is out of this world! I'm truly impressed and well worth the money. I'm not a professional sound analyzer but will be using the device to find hidden or unusual spectrums/ sounds. Get this app you will not be disappointed in the least.

Great price
Source:
As my daily job I install and service customers audio conference, video conference systems and live audio sound reinforcement systems for presentations. 12 years experience. This IPhone RTA app is the most accurate and used test instrument I use to setup and EQ these type of sound system to the room's accustics. It doesn't replace every test equipment. I say it just another valuable tool I always have with me everywhere I go.

This is awesome
Source:
I have a parr 3 and it now stays in the bag until I need an accurate spl reading. Yes I operate in extremely loud venues. I love this app. Get it.