March 8, 2011 SignalScope Pro 3.0 released

• Version 3 sports an improved user interface.
• Up to two tools of each type may be added to a project.
• User preferences are available for individual tools.
• Default audio device configurations, including channel labels, units, and sensitivity can be saved.
• Virtual input channels can be added to audio input devices. Two-channel signal arithmetic (add, subtract, multiply) is now supported.
• Arbitrary FFT lengths may be specified in FFT-based analysis tools.
• The Spectrogram supports log frequency scales and real-time 3D spectrogram display.
• Version 3 includes various other improvements over previous versions.
• SignalScope Pro may now be purchased and maintained through the Mac App Store.

Nov 11, 2010 SignalScope Pro 2.1.10 released

• Channel count changes for multi-channel audio devices are handled dynamically, avoiding potential crashes.
• Several other minor bugs have been corrected.

May 26, 2010 SignalScope Pro 2.1.9 released

• Output channels of certain multi-channel audio interfaces, such as the MOTU UltraLite mk3, are properly enumerated.
• Audio device channel gains on certain devices, such as the Wavelength Proton USB DAC, are properly restored when opening project files.

May 6, 2010 SignalScope Pro 2.1.8 released
Version 2.1.8 is a maintenance release that improves the stability of the application.

January 12, 2010 SignalScope Pro 2.1.7 released
Version 2.1.7 is a maintenance release that improves the stability of the application.

January 5, 2010 SignalScope Pro 2.1.6 released

• Impulse time weighting now passes the tone burst tests specified in ANSI S1.4.
• The recent projects menu gets updated properly again.
• Some AppleScript behaviors were corrected.
• This release includes other minor bug fixes, stability enhancements, and cosmetic refinements.

September 1, 2009 SignalScope Pro 2.1.5 released

• Version 2.1.5 improves compatibility with Snow Leopard (Mac OS X, version 10.6).
• Memory management and stability have been improved.
• Product updates can now be automatically retrieved and installed.
• Individual input channel calibration is now possible within the Device I/O Setup window.
• Some oscilloscope triggering issues have been corrected.
• Fractional-octave-band filters exhibit more accurate band edges and improved CPU performance.
• Other minor bugs and cosmetic issues have been corrected.

February 11, 2009 Version 2.1 released

• Input channel selection now relies on checkboxes and radio buttons for more intuitive operation.
• Unaffected channel settings are preserved when the input channel selection changes.
• The new Meter Bridge tool behaves like a multi-channel version of the Sound Level Meter.
• Up and Down auto-scaling options have been added to the FFT Analyzer and Oscilloscope tools.
• Changes made to table rows can be applied to all rows in the FFT Analyzer and Oscilloscope control drawers.
• The Signal Generator tool now supports processing the output signals with up to three Audio Units plug-ins.
• The Signal Generator tool now supports streaming its output signals to WAVE or AIFF audio files.
• Verstion 2.1 includes numerous bug fixes and stability enhancements.

February 12, 2008

• Version 2.0
• Completely redesigned, all new code
• Compatible with Leopard
• Comprehensive AppleScript support
• Each analyzer now resides in its own independent window.
• Audio device and analyzer configurations and acquired data can be saved in project files.
• Displays are accelerated with OpenGL graphics for on-screen drawing, and use Quartz 2D for high resolution off-screen drawing to PDF files or the printed page.
• Zoom and Pan cursor types are available for most data displays.
• Each analyzer has received numerous enhancements.
• The FFT Analyzer, Oscilloscope, and Meter Bridge tools can analyze multiple (more than 2) channels simultaneously.
• Current data can be captured for later review or export.
  Captured data can be exported to tab-delimited ascii text or MAT-files.
• Some analyzers allow live data to be overlaid on captured data for quick review.
• Independent calibration of device voltages and individual input/output channels is possible.
• Various units, such as Volts, Amps, and Pascals, are supported for input and output channels.
• Devices and input/output channel names are customizable (names are saved in project files).
• New tools: Sound Level Meter, Meter Bridge, and Signal Generator
• SignalScope Pro's new stereo signal generator supports Audio Unit generator plug-ins.
• Analyzers can take signal generator output directly.
• Numerous other improvements and enhancements

January 3, 2007
SignalScope Pro 1.8.5 prevents a potential crash at startup and allows Autoscale to be turned off in demo mode. Mac OS X version 10.3.9 or later is now required.

August 14, 2006
SignalScope Pro 1.8.4 includes an updated registration engine and allows proper cloning of multi-computer licenses.

May 8, 2006
SignalScope Pro (1.8.3) is now available as a Universal Binary!

September 26, 2005
SignalScope Pro 1.8.2 released

• When selecting a new audio device or starting up SignalScope, the current nominal sample rate of the device is kept. Previous versions of SignalScope automatically set the sample rate to its maximum value, which sometimes resulted in temporary loss of audio output on some computers, like the iMac G5. See Apple's article for more information (Article ID: 300832).

August 5, 2005
SignalScope Pro 1.8.1 released

• Version 1.8.1 fixes several bugs
• Key presses are no longer ignored in the serial number entry window
• Maximum dB scale text box is enabled/disabled, shown/hidden at the appropriate times
• The "Other" sample rate text box is handled properly
• Some user interface issues have been resolved
• Some printing issues have been resolved
• Other minor bugs have been fixed

May 5, 2005
SignalScope Pro 1.8 released