Version 3.0.5 corrects an issue that halted live updates of bar meters and fixes a bug that could potentially cause the app to crash.

Version 3.0.4 is a maintenance release.

* 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.

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

* 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.

Version 2.1.8 is a maintenance release that improves the stability of the application.

Version 2.1.7 is a maintenance release that improves the stability of the application.

The new updates include improved Leopard compatibility and stability enhancements. These updates are recommended for all users of SignalScope/Pro 2.x or SignalSuite 3.x.

* 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.

- 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

Version 1.8.7 includes an updated registration engine (with improved Leopard compatibility)

SignalScope 1.8.5 prevents a potential crash at startup and allows Autoscale to be turned off in demo mode.

Universal Binary version

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).