Audio Delay Alignment Calculator
Given the physical distance between a main loudspeaker and a delay/fill speaker, computes the DSP delay needed to time-align them at the audience. Temperature-corrects the speed of sound when provided.
Limitations: Anechoic propagation. Real rooms introduce phase alignment issues (reflections, line-array splay) that SPL-delay-wizard software models; this calculator answers only the geometric question.
What to do next: Apply the Haas rule: delays ≤ 30 ms combine into one perceived source; > 30 ms are heard as a distinct echo. Most delay-speaker deployments target 5–25 ms, enough to push the image toward the main PA without echo artifacts.