The FNG software allows real-time generation of noise signals and applying frequency filters for loudspeaker and audio testing, tinnitus masking, and more. It is available as Shareware.

One of the standout features of FNG is its ability to produce both white and pink noise signals with adjustable crest factor. Additionally, FNG allows users to store and recall presets, supports multi-sound card, and has a sampling frequency of up to 96kHz.
Users can also separately modulate amplitude left and right, switch channels on/off, and alter l/r phase. Furthermore, FNG enables users to save test tones as WAV files for Test CDs, making it easy to revisit past work or share with collaborators.
For those who require further control, FNG can be externally controllable via Windows Messages, making it an excellent software for those who need a high degree of precision and customization in their audio testing and development.
Version 1.11: Small updates in links