# Time Stretch (Speed Change) — 31 bands EQ / Export audio

> Real-time music player with time stretch, 31-band EQ, and AUv3 effects. (iPhone/iPad app by Loop-Sessions.LLC..)

- Source: https://appshunter.io/ios/app/time-stretch-speed-change/id637376117 (this page in markdown: same URL + `.md`)
- Developer: [Loop-Sessions.LLC.](https://appshunter.io/developer/414215366)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Rating: 3.60/5 from 21 App Store ratings · 38 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 5 MB
- Languages: American English, Japanese
- Released: 2013-04-26
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/time-stretch-speed-change/id637376117/reviews.md

## What is Time Stretch (Speed Change)?

[ Important Notice ]
With this version (7.0.0), we are ending regular updates for this app.
You can continue using this app, but future development and updates will continue in 'Audio Unit Player', which includes this app's functionality.
'Audio Unit Player' is a free app that supports both speed and pitch adjustment and includes a 31-band equalizer with no band restrictions.

Data Transfer:
File information registered in this app is not transferred automatically to 'Audio Unit Player'. Use the Files app to manually copy any files you need.";
================================================

This app is a music player that can process the following effects in real time.
- Time stretch (0.5-2.0 double speed)
- 31 band equalizer (required In-App Purchase)
- Reverb
- AUv3 (Audio Unit v3) host

If you play a musical instrument, this app should be supported by you lower the speed and play when you copy of a musical piece.

[Function]
- Perform time stretch in real time (50 - 200%).
- 31 bands EQ (Hz: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k).
(Initiality, only 3 bands are available. It's possible to use 31 bands by In-App Purchase.)
- EQ preset (Abundant Built-in Presets / Custom Presets) (required In-App Purchase).
- Reverb: Adjustable decay time (Low freq, High freq) / 13 presets
- Reverb preset (Built-in Presets / Custom Presets)
- Can be used as an AUv3 host.
- A-B loop playback.
- Center Cancel / Center Emphasis.
- Lch, Rch each mute.
- Quick fast forward, rewind (specify the number of seconds).
- Check and set current position graphically in wave view.
- Supports Auto-Lock ON/OFF.
- Supports background playback.
- Supports export (file writing) function (Each effect (speed/EQ) value set for each song is also reflected. The range specified in the loop section is output.)

In addition to loading music data included in the standard "music" app, it also supports the function to import audio files from other apps ("Voice Memos" etc.).

[How to import from "Voice Memos"]
1. Start the app "Voice Memos" and tap the mark "..." of the file to be imported from the list.
2. Tap "Share" on the sheet displayed from the bottom.
3. Tap "More" found by scrolling the displayed list of sharing destination apps to the right.
4. Select "Time Stretch" if available. The file is copied to this app.

================================================
[Note 1]
This application will not be able to read songs of the following formats.
- Songs from Apple Music, iCloud, iTunes Match
- Songs that are protected by digital copyright (DRM)

[Note 2]
Depending on the state of your device, your custom AUv3 effects may not appear in the list.
As a solution, you can solve the problem by starting "GarageBand" once and restarting this app.
================================================

## Key features

- Real-time time stretch (50-200%)
- 31-band equalizer with presets
- AUv3 effects support
- A-B loop playback
- Center Cancel/Emphasis
- Background playback
- Audio file export

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 31 bands equalizer | $0.99 | one-time |
| Always remove banner ads. | $2.99 | one-time |


## Recent user reviews (10 of 38)

All indexed reviews: https://appshunter.io/ios/app/time-stretch-speed-change/id637376117/reviews.md

### 1/5 — 音が突然止まる。

*2026-03-06*

再生中に突然音が止まる。

以前からですが、アプデされても変わらず。
調子が悪い時は毎回曲の同じ部分で止まったりするので非常に苛つきます。

原因わかりませんか？

**Developer response:** コメントありがとうございます。
Ver.6.2.8 にて、再生まわりの処理を修正しました。
アップデートして、試していただければと思います。

### 2/5 — Auch hier, App kann nicht als AuV3 Plugin geladen werden

*2025-09-06*

Und auch hier störende AdvertisingTracker, die einzeln Deaktiviert werden müssen.

### 1/5 — いつも使用していますが…

*2025-06-01*

結構な頻度で使えなくなります。アプリ内にコピーした曲がなくなっており、新たにコピーしようとしても、コピーできませんでしたと表示。
ほぼ毎日のようにアプリを削除してダウンロードし直して利用しています。何とかならないものでしょうか？

**Developer response:** いつもご利用いただき、ありがとうございます。
ファイル処理について、お手数をおかけして申し訳ございません。

「選択した曲ファイルをアプリ内にコピーできませんでした。」というメッセージのアラートダイアログが表示されることでよろしかったでしょうか？

考えられることとしまして、本アプリの曲リストで削除した場合、他からコピーしたファイルについては、リンクを削除しただけですので、実際のファイルはまだ残っていることが起こりえます。
標準の「ファイル」アプリの本アプリのフォルダ領域にて、コピーしようとしたファイルが残っているかどうかをご確認いただけますでしょうか。

解決しないようでしたら、こちらのレビューを更新していただければ、また対応させていただきます。
よろしくお願いいたします。

### 4/5 — とても使いやすい

*2025-03-24*

とても重宝して使わせてもらっていますが、最近曲の中で移動するとバグるようになってしまいました。改良を期待したいです。

**Developer response:** コメントありがとうございます。
Ver.6.2.4 にて、再生中に再生位置を移動させたときにクラッシュすることがある点について対策を施しました。
アップデートしていただき、試していただければと思います。

### 3/5 — Sam

*2024-01-23*

Can you add the iOS files to this app rather than iTunes?

**Developer response:** Thanks for your comment.
Please check the steps below.
1. Start the app "Files" and long press the file to be imported from the list.
2. Tap "Share" on the sheet displayed from the bottom.
3. Tap "More" found by scrolling the displayed list of sharing destination apps to the right.
4. Select "Time Stretch" if available. The file is copied to this app.

### 1/5 — モバイルの曲を　移せない

*2023-12-21*

使いづらい

**Developer response:** コメントありがとうございます。 
以下の手順にて、ファイルの移動が可能です。お試しください。

1. 本アプリの再生リスト画面（画面左上の音符ボタンをタップ）にて、リストの右側の「...」をタップして、「エクスポート」を選択すると、ファイルが出力されます。
2. 標準の「ファイル」を開き、「ブラウズ」タブから [このiPhone内] - [Time Stretch] を選択すると、エクスポートしたファイルがあります。
3.（標準の「ファイル」アプリの）リストを長押しすると、「共有」や「コピー」の項目がありますので、試していただければと思います。

### 1/5 — Not auv3

*2022-04-04*

Pointless.

**Developer response:** Thanks for your comment.
This is the Player App that allows you to add and use other AUv3.

### 5/5 — 楽器演奏の練習に最適

*2020-08-16*

ウクレレの演奏練習に使っています。スピードコントロールも出来るので、最初はゆっくりから始められるので、とても便利です。
欲を言いますと、いきなり曲が始まってしまいますので、アップグレードか何かで、曲の前に１小節ぐらいのメトロノーム音など挿入出来た最高なんですけれど。

### 5/5 — Nice clear audio at any speed

*2020-05-26*

Nice clear audio. Handy utility.

### 2/5 — 曲追加できないんですが

*2020-01-03*

文字通り

**Developer response:** コメントありがとうございます。
曲の追加については確認して公開させていただいておりますが、もし追加できないようでしたら、お手数ですが手順をこちらにご教示いただけますと助かります。検証して、改善できるようでしたら対応させていただきます。
どうぞよろしくお願いいたします。

## Frequently asked questions about Time Stretch (Speed Change)

### What is Time Stretch's primary function?

Time Stretch is a music player that enables real-time audio processing, including adjusting playback speed and applying a 31-band equalizer. It also supports AUv3 effects for advanced audio manipulation.

### Does Time Stretch have ads?

Yes, Time Stretch contains advertisements. As a free application with in-app purchases, advertisements are displayed to support its continued development.

### How can I unlock the full 31-band equalizer in Time Stretch?

The full 31-band equalizer and abundance of EQ presets are unlocked through an In-App Purchase within Time Stretch. Initially, only 3 bands are available.

### Can Time Stretch play music in the background?

Yes, Time Stretch supports background playback, allowing you to continue listening to your audio with effects applied even when the app is not in the foreground.

### What audio formats are not supported by Time Stretch?

Time Stretch cannot read songs from Apple Music, iCloud, or iTunes Match, nor can it play songs protected by digital copyright (DRM).

### How often is Time Stretch updated?

The latest version, 6.2.8, was released on 2026-03-22, indicating recent development activity. Updates typically address bugs and introduce new features.

### What devices is Time Stretch compatible with?

Time Stretch is designed for both iPhone and iPad devices, offering its audio processing capabilities across Apple's mobile platforms.

### How do I import audio files from Voice Memos into Time Stretch?

To import from Voice Memos, tap the '...' menu on your audio file, select 'Share', then 'More', and finally choose 'Time Stretch' from the list of sharing destinations.

## Version history (last 5 releases)

### 7.0.0 — 2026-08-25

[ Important Notice ]
With this version (7.0.0), we are ending regular updates for this app.
You can continue using this app, but future development and updates will continue in 'Audio Unit Player', which includes this app's functionality.
'Audio Unit Player' is a free app that supports both speed and pitch adjustment and includes a 31-band equalizer with no band restrictions.

Data Transfer:
File information registered in this app is not transferred automatically to 'Audio Unit Player'. Use the Files app to manually copy any files you need.";

### 6.5.0 — 2026-08-18

- Added Reverb effect (supports custom presets).
- Updated the 31-band EQ UI (iPhone: changed screen design; iPad: moved to a dedicated screen).

[ Important Notice ]
The next update (Ver. 7.0.0) will be the final regular update for this app.
You can continue using the app, but future development will move to another app.
Details will be announced in the next update.

### 6.4.0 — 2026-08-14

Supported Custom Equalizer Presets  (required In-App Purchase).
In addition to the standard presets, you can now save your own customized EQ settings.

### 6.3.0 — 2026-07-26

Added support for multiple playlists. You can now switch between playlists using tabs.

### 6.2.8 — 2026-03-22

Fixed issues with playback stability.

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## More apps by Loop-Sessions.LLC.

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- [鷹の爪スタンプLite](https://appshunter.io/ios/app/lite/id579668660)

All apps by Loop-Sessions.LLC.: https://appshunter.io/developer/414215366

## Related topics

[stretch music](https://appshunter.io/ios/topics/stretch-music)

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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.*