Transfer Function

Transfer Function

Magnitude, Phase, Coherence

2 ratings
1 review
$49.99
In-App Purchases

Details

  • Released
  • Updated
  • February 23, 2014
  • December 22, 2025

Features

Transfer Function video #1 for iPhone
Transfer Function screenshot #2 for iPhone
Transfer Function screenshot #3 for iPhone
Transfer Function screenshot #4 for iPhone
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About

This app performs dual-FFT acoustic analysis for sound systems, including music. It offers magnitude, phase, and coherence graphs, a delay finder, and a signal generator. It can operate with internal microphones or external audio interfaces for comprehensive sound system monitoring and equalization.

Dual-FFT acoustic analysis
Magnitude, Phase, Coherence graphs
Delay Finder
Signal Generator
Music as signal source
Internal microphone support
Two-channel audio interface compatibility
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What's New in Transfer Function

5.6

December 22, 2025

-Bug fixes and stability improvements

1

In-App Purchases

$14.99

Reference Curves Option

Reference Curves Option

User reviews

Unusable on 5th Gen iPad Air

Jan 8, 2025 - Finally got around to testing out the app. In a controlled environment under a variety of circumstances, program is unable to make reliable delay calculations on an up to date 5th gen iPad Air. Even with a “save photo” feature there is no meaningful way to compare two FFT graphs in-app. Major doubt is also thrown on the accuracy of the results given the wild variance in results on the delay finder.

I downloaded the app with the hopes of using it to calculate software and hardware latencies, as well as quickly time and phase align PA before shows - I can do neither of these things. Disappointed and would like a refund.
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Developer apps

FAQ

What is Transfer Function used for?

Transfer Function is a dual-FFT acoustic analysis app designed for sound system audio analysis. It helps monitor and adjust system equalization, especially during musical performances.

Can Transfer Function be used with music?

Yes, Transfer Function can operate with music as the signal source. This allows for real-time monitoring and adjustment of system equalization during live musical performances.

Does Transfer Function require special hardware?

While it can function with the internal iOS microphone by routing its pink noise generator, Transfer Function is optimized for use with a two-channel audio interface like the Studio Six Digital iAudioInterface2 for full program material analysis.

What are the main analysis tools in Transfer Function?

The app includes a Magnitude Graph, Phase Graph, Coherence Plot, a Delay Finder, and a Signal Generator for comprehensive acoustic analysis.

How much does Transfer Function cost?

Transfer Function is a paid application, priced at $49.99. It is available for iPhone, iPad, and iPod.

What is the update frequency of Transfer Function?

The app was last updated on December 22, 2025, indicating active development. Its latest version is 5.6.

What is the user sentiment for Transfer Function?

Based on available data, Transfer Function has a rating of 3.0 stars from 2 ratings, suggesting a mixed user reception.

Is Transfer Function suitable for all ages?

Transfer Function has an age rating of 4+, making it suitable for younger users and adults alike.