SignalScope and SignalScope Pro updated for iOS

SignalScope 7.2.1 and SignalScope Pro 6.2.1 for iOS are now available for download on the App Store. These maintenance releases include the following improvements:

  • When the minimum frequency (Fmin) in the FFT analyzer was set to a value larger than 0, autoscale did not behave correctly. This has been fixed.
  • High frequencies were sometimes displayed incorrectly in the FFT analyzer when Fmax was set to a value higher than half the sample rate and smoothing was turned off. This has been fixed.

(In the standard version of SignalScope, setting Fmin and Fmax requires the Data Acquisition Upgrade, available via in-app purchase.)

Download SignalScope Pro 6.2.1

Download SignalScope 7.2.1

 

Set arbitrary frequency limits in SignalScope Pro 6.2

The FFT-based spectrum analyzer in SignalScope Pro 6.2 allows arbitrary upper and lower frequency bounds (Fmax and Fmin) to be specified for the spectrum display. The cursor peak track function will operate only within the specified frequency bounds. The hardware sample rate may optionally be automatically adjusted to best match the specified value for Fmax.

FFT_Plot_Limits     FFT_Options

FFT_Plot_Limits_2

An example:

A typical minimum sample rate of iOS hardware is 8 kHz. If a frequency resolution of 1 Hz is used for the spectrum, and values of 10 and 400 are specified for Fmin and Fmax, respectively, the data between 10 and 400 Hz will be plotted and the plot will be scaled to extend only from 10 and 400 Hz. If the cursor peak track function is enabled, the cursor will find the frequency of the highest magnitude between 10 and 400 Hz.

If the option to automatically adjust the sample rate based on Fmax has been selected, the hardware sample rate (Fs) will automatically be reduced to the minimum rate required to acquire data up to 400 Hz. In the case of typical iOS or USB audio input hardware, this rate would be 8 kHz. Since FFT data would then include values between 0 and 4 kHz, an additional option allows either all data (0 to 4 kHz) or only data from 10 to 400 Hz to be exported when saving FFT data to a CSV, TXT, or MAT file. Note that the DC term may be omitted from exported data when FFT data is displayed on a logarithmic frequency scale.

Also new in SignalScope Pro 6.2:

  • When “cpm” is selected for units of frequency, exported data files will include frequencies specified in cpm.
  • The nominal microphone sensitivity is properly set on the new iPhones.
  • Other bug fixes/stability enhancements, including iOS 9 compatibility.

Similar improvements have been added to version 7.2 of SignalScope. Specifying values for Fmin and Fmax in SignalScope require the Data Acquisition Upgrade, which is available via in-app purchase.

Download SignalScope 7.2

Download SignalScope Pro 6.2

 

Easy calibrated vibration measurements on Mac or iOS

digiducer_04_CE_mediumAlthough Faber Mac and iOS apps have offered excellent sound and vibration analysis tools from the start, the introduction of the Digiducer 333D01 USB Digital Accelerometer makes vibration measurement easier and more portable. When the 333D01 is connected to a Mac, iPhone, or iPad, it will be immediately recognized by our apps and ready for calibrated measurements.

For example, SignalScope Pro will recognize the connected 333D01 as an accelerometer and set the measurement units accordingly. SignalScope Pro will also automatically read calibration information from the 333D01 and establish the appropriate sensitivity so calibrated measurements can be made immediately. This works with both the Mac and iOS versions of SignalScope Pro.

Sensitivity_2_1024x1024

The 333D01 communicates with Mac OS or iOS via the standard USB Audio Class driver. Connecting to a Mac is as simple as plugging the 333D01’s cable into an available USB port. For iOS, Apple’s Lightning to USB Camera Adapter is required.* When connecting to iOS, no additional power source is required, which makes Faber apps and the 333D01 part of an ultraportable vibration measurement system.

digiducer-03

Auto-calibrated measurements with the 333D01 are supported in Electroacoustics Toolbox, SignalScope and SignalScope Pro for Mac, and in IOScopeSignalScope and SignalScope Pro for iOS.

 

Buy the 333D01 USB Digital Accelerometer

Download Electroacoustics Toolbox (Mac)

Download SignalScope Pro (Mac)

Download IOScope (iOS)

Download SignalScope Pro (iOS)

 

*Older iOS devices may require a 30-pin to USB adapter, such as the one available in Apple’s original iPad Camera Connection Kit.

SignalScope Pro 4 for iOS uniquely identifies USB audio devices

SignalScope Pro version 4 can uniquely identify USB audio devices attached to iPhone, iPod touch, or iPad, and remember user settings for each device the next time it is connected. Direct support has been added for The Modal Shop’s model 333D01 USB digital accelerometer and miniDSP’s UMIK-1 USB measurement microphone. With the 333D01, SignalScope Pro automatically loads serial number and sensitivity calibration information directly from the device as soon as it is connected. When the UMIK-1 is connected, SignalScope Pro recognizes it and prompts the user for its serial number. Sensitivity calibration and frequency response data for the UMIK-1 can then be downloaded automatically, just by entering the UMIK-1’s serial number.

Another major new feature in version 4 is SignalScope Pro’s ability to load microphone frequency response data (FRD) and apply frequency response correction (FRC) to FFT spectrum measurements. FRD can be loaded for any input channel, for any kind of transducer (i.e. it’s not just for microphones). Sophisticated interpolation techniques are employed to generate a smooth frequency response
correction curve that matches the loaded data. This correction curve can then be applied to an FFT spectrum
of arbitrary length or frequency resolution.

SSP4 Accel and Mic

Also new in version 4:

– SignalScope Pro directly supports The Modal Shop’s model 333D01 USB digital accelerometer, and can automatically load serial number and sensitivity calibration information directly from the device. Making calibrated acceleration measurements is as easy as plugging in the 333D01. Factory calibration information is embedded in exported audio files (from the Oscope tool) when data is acquired with the 333D01.

– SignalScope Pro directly supports the miniDSP UMIK-1 USB measurement microphone. Sensitivity calibration and frequency response data for the UMIK-1 can be downloaded automatically, just by entering the UMIK-1’s serial number. Making calibrated sound level measurements is as easy as plugging in the UMIK-1 and typing in its serial number (the serial number only needs to be entered once, after which SignalScope Pro will remember the microphone sensitivity).

– Additional dB scales of 3, 6, 12, 15, and 18 dB per div are now supported by the FFT analyzer. Also, when adjusting the dB scale manually, the dB offset will always be set as a multiple of the scale so that 0 dB is always available in the vertical axis labels.

– Minor bug fixes and cosmetic enhancements.

– Apple’s Lightning to USB Camera Adapter or iPad Camera Connection Kit is required for connecting USB Audio devices to your iPhone, iPod touch, or iPad.

– SignalScope Pro 4 requires iOS 7 or later.

Similar features have been added to SignalScope 5.0, although select in-app upgrades may be required (available via in-app purchase).

Download SignalScope Pro