# TfxEcho — TimeFX Echo / Delay

> Analog-inspired echo and delay effect AudioUnit Extension plugin. (iPhone/iPad app by Ryo Togawa.)

- Source: https://appshunter.io/ios/app/tfxecho/id1523777426 (this page in markdown: same URL + `.md`)
- Developer: [Ryo Togawa](https://appshunter.io/developer/1474193056)
- Category: Music
- Price: $4.99
- Rating: 4.70/5 from 12 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.5 · 1 MB
- Languages: American English
- Released: 2020-07-16
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/tfxecho/id1523777426/reviews.md

## What is TfxEcho?

TfxEcho is an echo effect AudioUnit Extension plugin. It uses delay lines which are inspired by BBD (bucket brigade device). BBD is used in various analog delay unit and is known for its warm and dark sound. The delay line uses fixed length buffer and an artificial clock to sample input signal in variable sampling rate. When the delay time is changed, the delay line can produce pitch change effect which is similar to the behavior of the BBD based analog delay unit. 

The delay line is inspired by BBD, but it is not emulation of the any particular BBD. Unlike the typical BBD based delay unit, frequency range of the delay line is not limited. The delay line is capable to capture signal in higher frequency up to about 22KHz. 

Features

AudioUnit Extension

- Delay Time: From 20 ms to 1200 ms
- Feedback: From 0 % to 100 %
- Adjustable lowpass filter and high-pass filter.
- Modulation rate: From 0.01 Hz to 10 Hz
- Modulation width: From 0 ms to +/- 10 ms
- Delay time can be synced to tempo provided by the host application.

Host Application

Host application uses system audio input as an audio source and processed audio signal is routed to the system audio output.

## Key features

- Echo and delay effect
- BBD-inspired delay lines
- Adjustable delay time (20-1200 ms)
- Feedback control (0-100%)
- Low-pass and high-pass filters
- Modulation rate and width
- Tempo sync

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/tfxecho/id1523777426/reviews.md

### 1/5 — Not velocity sensitive

*2024-03-05*

As far as i can tell this app has only 2 levels of velocity sensitivity. Avoid this if you are a keyboard player.

### 5/5 — best auv3 delay of its class

*2022-09-12*

insanely useful and easy to control. A no brainer even when full price.

### 5/5 — me likey!

*2020-08-15*

very nice authentic sounding echo fx. just perfect! 

bring it to macOS, too!

### 5/5 — Love

*2020-07-17*

Nice

### 5/5 — There are lots of delays....

*2020-07-17*

But this one sounds really nice to my ear. Being able to change delay time and feedback including automating them without any glitches makes this extra special. Truly reminds me of my old Deluxe Memory Man but modernized and without the aliasing and clock noise! Maybe those could be added in? 😆

## Frequently asked questions about TfxEcho

### What is TfxEcho?

TfxEcho is an AudioUnit Extension plugin that provides an echo and delay effect. It is inspired by the warm and dark sound of BBD analog delay units.

### What devices does TfxEcho support?

TfxEcho is available for iPhone, iPad, and iPod touch devices.

### How much does TfxEcho cost?

TfxEcho is a paid application, priced at $1.99.

### What is the delay time range in TfxEcho?

The delay time in TfxEcho can be adjusted from 20 milliseconds up to 1200 milliseconds.

### Does TfxEcho have ads?

No, TfxEcho does not contain advertisements.

### How often is TfxEcho updated?

The latest version of TfxEcho was released on January 15, 2026, indicating regular updates are provided by the developer.

### What is the age rating for TfxEcho?

TfxEcho has an age rating of 4+, making it suitable for a wide range of users.

### Can TfxEcho sync to tempo?

Yes, TfxEcho allows the delay time to be synced to the tempo provided by the host application.

## Version history (last 5 releases)

### 1.9 — 2026-01-15

Version 1.9 contains improvements and bug fixes.
- Support iOS 26 and iPadOS 26.

### 1.8 — 2023-09-18

Version 1.8 contains improvements and bug fixes.
- Support iOS 17 / iPadOS 17.

### 1.7 — 2023-06-08

Version 1.7 contains improvements and bug fixes.
- Fix a problem that AudioUnit Extension doesn't load in host application.

### 1.6 — 2022-09-09

Version 1.6 contains improvements and bug fixes.
- Support iOS 16 / iPadOS 16.

### 1.5 — 2021-09-17

Version 1.5 contains improvements and bug fixes.
- Support iOS 15 / iPadOS 15.

## Apps similar to TfxEcho

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Things - Crusher](https://appshunter.io/ios/app/things-crusher/id6449363172) | 5.0 (6) | $6.99 | Music |
| [Phosphor 3](https://appshunter.io/ios/app/phosphor-3/id1499115553) | 4.7 (9) | $5.99 | Music |
| [sumFX](https://appshunter.io/ios/app/sumfx/id6450494474) | 4.4 (12) | $9.99 | Music |
| [Yukawa - AUv3 Plug-in Effect](https://appshunter.io/ios/app/yukawa-auv3-plug-in-effect/id1529500098) | 4.8 (33) | $4.00 | Music |
| [resonatedo](https://appshunter.io/ios/app/resonatedo/id6444891127) | 5.0 (8) | $3.99 | Music |
| [FAC Bandit](https://appshunter.io/ios/app/fac-bandit/id1458633968) | 4.9 (57) | $9.99 | Music |

## More apps by Ryo Togawa

- [VADrumSM](https://appshunter.io/ios/app/vadrumsm/id1474193057)
- [ChannelEqualizer](https://appshunter.io/ios/app/channelequalizer/id1513527511)
- [ChStrip](https://appshunter.io/ios/app/chstrip/id1518510831)
- [TfxMod](https://appshunter.io/ios/app/tfxmod/id1524639578)
- [TfxReverb](https://appshunter.io/ios/app/tfxreverb/id1529840178)

All apps by Ryo Togawa: https://appshunter.io/developer/1474193056

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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 2026-08-24.*