Free DAF Stuttering Tool
Try delayed auditory feedback, frequency-altered feedback, metronome pacing, and choral speaking in your browser. Built for adults 18+ as practice support, not a cure or diagnosis.
Headphones recommended
Adjust DAF and FAF
Browser-only audio
Use this carefully
DAF and FAF can feel immediately different for some people, but individual response varies. Practice with and without audio support, and consider an SLP when speech concerns affect work, school, relationships, or daily life.
Headphones required. DAF and FAF need headphones to work without speaker feedback.
Start Audio Lab
Tap to enable microphone and start browser audio processing.
Hear your voice with a slight delay. Helpful for some people in structured practice; carryover still needs unaided practice.
Shift the pitch of your voice. Some people experience a choral-like practice effect; individual response varies.
Practice paced speaking with a steady beat in reading or low-pressure drills.
Read along with a synthesized voice, then practice without support for transfer.
Want to keep building on this?
Save your settings, compare practice sessions, and unlock AI phone-call reps.
Use headphones to prevent feedback. Audio is processed in your browser and is not recorded or sent to StutterLab servers by this tool.
Common questions
What is DAF?
Delayed auditory feedback lets you hear your own voice with a short delay. Some adults who stutter find it helpful during structured practice, though real-world effects vary.
Do I need headphones?
Yes. Headphones are strongly recommended for DAF and FAF so your microphone does not pick up speaker audio.
Is this speech therapy?
No. This is a practice-support tool for adults 18+. It does not diagnose, treat, cure, or replace care from a licensed speech-language pathologist.