SignalSuite is an audio test signal generator.

Features:

• Select any audio output device available in Mac OS X (version 10.4 or later).
• Select any two output channels on multi-channel audio devices.
• Choose from all output signal formats supported by the current audio device.
• Invert polarity on either output channel.
• Generate any of the following signal types:
  • Sinusoid.
  • Square Wave with arbitrary duty cycle.
  • Triangle Wave.
  • Sawtooth Wave.
  • Random Noise (white or pink).
  • Maximum Length Sequence, or MLS (white or pink).
  • Pseudorandom Noise (white or pink), designed for a perfectly flat spectrum with corresponding FFT length.
  • Swept Sine (Chirp) with linear or logarithmic frequency sweep.
  • Optional Swept Cosine signal, phase-locked with Swept Sine.
  • Any signals produced by Audio Unit generator plug-ins.
• Relative Phase adjustment between the two periodic signals.
• Independent amplitude adjustment, fine and coarse frequency controls, and pan for periodic signals.
• Choose upper and lower frequency limits, duration, sweep direction, and repeat of swept sine.
• Choose any combination of available signal types to be active simultaneously.
• Master Start/Pause control.
• Master Volume control.
• Start or pause SignalSuite from the dock icon popup menu.
• Save signals of arbitrary duration directly to a standard audio file (AIFF or WAVE format).
• Extensive AppleScript support.
• Multiple panning behaviors.