Audio Speaker Time Alignment

Required delay-tower delay (ms) from speed-of-sound formula; Haas-window offset.

Run the calculator

Example

You enter

Distance from mains (ft) 80
Distance from delay (ft) 30
Ambient (°C) 22
Haas offset (ms) 15

You get

Speed of sound 344.632
Time difference 44.22 ms
Recommended delay 59.2 ms

Details, formula, and sources

Speed of sound c = 331.3 + 0.606 × T_C (m/s). Delay-tower delay (ms) = distance_m / c × 1000. Haas-window offset 10-30 ms recommended for delayed system natural-source perception.

Classical acoustics; AES (Audio Engineering Society) information documents on time-alignment by name.

AES information documents free at aes.org/standards/blog.

Estimate. Head rigger and manufacturer working-load-limit charts govern. Inspect every piece of hardware before the show.

Field names used by the API: d_main_ft, d_delay_ft, ambient_C, haas_offset_ms, c_m_s, ms_difference, recommended_delay_ms

Default temperature 68 °F (20 °C) unless user suppliesengineering practice