Filtered Noise Generator creates white and pink noise and applies frequency filters in real time for loudspeaker testing, crossover development and tinnitus masking. It includes stereo channel and phase controls, separate left/right amplitude modulation, scripting with a built-in editor, saved presets and support for multiple sound cards. Signals can be exported as WAV files.

Filtered Noise Generator is a Windows audio test tool for producing noise signals and shaping them with frequency filters in real time. It is intended for loudspeaker testing, audio crossover development, tinnitus masking and other tasks that require controlled noise rather than ordinary music playback. Its output can be adjusted and routed for different test arrangements, including setups with more than one sound card.

The program generates white and pink noise, with an adjustable crest factor to control signal dynamics. Frequency filtering lets an operator restrict the output to a selected range: a high-pass signal can test a loudspeaker’s upper usable bandwidth, while a low-pass signal can be used for lower-frequency components. A band-pass filter can concentrate masking noise around a tinnitus frequency range. These filtered signals can also help compare crossover settings when testing woofer and tweeter combinations.

Stereo controls support separate amplitude modulation for the left and right channels, channel on/off switches and left/right phase switching. For crossover experiments, a low-pass signal can be assigned to one channel and a high-pass signal to the other, then sent to the respective speakers. Sampling rates up to 96 kHz are supported, and generated signals can be saved as WAV files for use in test CDs or other playback workflows.

Macros allow sequences of noise settings to be run as scripts, with a dedicated Script Editor for creating and editing them. Parameter presets can be saved to disk and recalled later, making it easier to repeat measurements or return to known test configurations. External control through Windows Messages can also fit the generator into an automated testing setup.

Filtered Noise Generator is trialware for Windows, including Windows 7 and 7 x64. It is suited to audio technicians, speaker-system builders and listeners who need a configurable masking signal. Its focus is signal generation and test control rather than general-purpose audio editing or playback.

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