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.
Version 3 includes various other improvements over previous versions.
SignalScope 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.

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.
* 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.
* 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).
- 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).

New Icon
Tiger Support
Several bug fixes

A means for cloning registered copies of SignalScope has been added for those who purchase volume licenses.
Version also 1.7.1 fixes two minor bugs.

SignalScope version 1.7 adds independent vertical offsets of oscilloscope waveforms, as well as greatly improved waveform triggering.  The Oscilloscope now records data captured prior to the trigger event and allows manual adjustment of the horizontal waveform orientation.  A text box has been added to the FFT Analyzer to allow for manual adjustment of the maximum limit of the dB magnitude scale.  Several minor improvements offer enhanced program stability as well as improved compatibility with audio devices operating with sample rates up to 192 kHz.

SignalScope version 1.6 adds support for multi-channel
audio devices and enhanced control over input signal formats, including
the option to invert the polarity of either or both input
signals.  SignalScope 1.6 also makes guardbanding optional,
allowing for frequency content to be displayed all the way up to the
Nyquist frequency (half the sampling rate).  Numerous other
features have been added or enhanced, including:

Support for audio devices with multiple, non-interleaved
audio data streams (including

multi-channel devices and the Echo Indigo io)

Enhanced audio device input format controls

Option to invert polarity for either or both data channels

Option to turn off guardbanding (and/or digital
anti-alias filters) to view FFT frequencies up to

Nyquist frequency (half the sample rate)

Option to start/pause SignalScope from the Dock icon
popup menu

Exponential averaging parameter given as integer number
of spectra contributing to overall average

Flat top and Rife-Vincent 2 data window types

Optional grid over Spectrogram display

Improved Spectrogram axis labeling

Several bug fixes