# Surviving Audio — Audio Calculator Reference

> Audio Calculator Reference (iPhone/iPad app by Juerg Andres.)

- Source: https://appshunter.io/ios/app/surviving-audio/id6766522743 (this page in markdown: same URL + `.md`)
- Developer: [Juerg Andres](https://appshunter.io/developer/1896296893)
- Category: Music, Productivity
- Price: $5.99 (on sale, was $9.99)
- Age rating: +17
- Requires: iOS 15.0 · 4 MB
- Languages: American English
- Released: 2026-05-06
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/surviving-audio/id6766522743/reviews.md

## What is Surviving Audio?

Plan the show, before the show.

Surviving Audio is the pre-show planning suite for working sound engineers. Built around real-world workflows from the live PA design playbook — McCarthy-grade math, dynamically visualized, with practical guides on every tool.

The big six:

Stereo PA Quick-Eval — Type room dimensions (W × D), get a complete system recommendation: speaker spacing, coverage range, throw distance, FAR/LAR, plus a class verdict (long-throw, standard, wide, multi-box). Answers "which system do I bring?" in 30 seconds.

Multi-Tower Delay Chain — One tower? Five towers? The app calculates the position and electrical delay for every tower based on your venue depth and the 40 ms threshold (temperature-adjusted). Visualizes the entire chain with side-elevation diagram.

Spatial Crossover — The exact position where main and delay tower meet at equal level, plus the delay setting in ms and samples. Includes a level-vs-position SPL plot showing the transition zone.

Sub Setup Recommende — Number of subs + crossover frequency + stage width = the right configuration. Single, coupled, stereo (with power-alley warning), cardioid stack, end-fire, distributed, or coupled block. Each rendered as a top-down stage diagram with λ/2 reference.

Cardioid + End-Fire Sub Designer — Calculate delays, polarity, and forward gain. Interactive polar plots at chosen frequency. Top-down layouts with dimensioned spacing.

Line Array Splay (Field Estimate) — Rough estimation of splay angles using only a laser distance meter. Side-elevation showing progressively splayed boxes. Pre-MAPP/ArrayCalc reality check.

And much more:


## Version history (last 1 release)

### 1.0 — 2026-05-06

No release notes.

## More apps by Juerg Andres

- [SoundTools Pro](https://appshunter.io/ios/app/soundtools-pro/id6766501581)
- [Use Your Ear](https://appshunter.io/ios/app/use-your-ear/id6766522899)

All apps by Juerg Andres: https://appshunter.io/developer/1896296893

## Related topics

[stable audio](https://appshunter.io/ios/topics/stable-audio)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*