DAF/FAF Assistant is software that helps people who stutter to improve their speech fluency, increase confidence and maintain fluency consistency with regular practice.

Delayed auditory feedback (DAF) is a key feature of the software, whereby the user's voice is delayed fractionally to their ears. The delay range is between 40 to 220 milliseconds, giving users a level of control over their speech. A short delay of 50-80 milliseconds can reduce stuttering almost instantly, without changing the speaking rate. Longer delays of 90-220 milliseconds encourage slower speech and the stretching of vowels. While this can help even with severe stuttering, it requires training and mental effort and may sound abnormal.
The software also includes Frequency Altered Feedback (FAF) with a pitch range of one-half octave down to one-half octave up. Using FAF in conjunction with DAF offers users an even more effective solution. Additionally, the Fast FAF option offers another frequency shifting algorithm that works better on less powerful computers while still providing good sound quality.
The software saves configured settings and applications when closed and auto-restores them upon startup. Auto Start mode automatically begins sound playback upon program startup, and users can assign a shortcut key for ease of access. The software can run in the background or minimized, allowing users to multitask while maintaining ease of use.
Overall, DAF/FAF Assistant is easy to install and use, with an intuitive graphical user interface. The software is highly recommended for anyone seeking to improve their speech fluency, increase their confidence levels, and develop carryover fluency with regular use.
Version 1.1: N/A