How SingLift Sustain measures stable duration
SingLift Sustain focuses on one narrow question: how long a sustained tone remains stable enough to be counted during use.
What SingLift Sustain measures
SingLift Sustain measures stable sustained-tone duration. During a measurement, the app listens through the microphone and evaluates whether the tone is suitable for a stable-duration result.
What stable duration means
Stable duration is the amount of time a sustained tone remains steady enough for measurement. It is a time-based result, not a score, rank, or judgment of singing quality.
How vocal stability supports measurement
Vocal stability and pitch stability help the app decide whether the current sustained tone should continue counting toward the measured duration. If the tone becomes unclear or unstable, the measurement can stop or fail to appear.
What can interrupt a measurement
A measurement may be interrupted when the tone stops, becomes too quiet, shifts too irregularly, or is affected by microphone conditions or background noise.
Measurement history and personal best
Completed measurements are saved on your device for measurement history. Personal Best identifies the longest stable duration available from saved measurement results.
What SingLift Sustain does not do
SingLift Sustain does not provide medical advice, diagnosis, singing instruction, scores, rankings, or a guarantee of improvement. It is a focused measurement tool for stable sustained-tone duration.