Audio Unit Player7.0.5 - App Store

This app is a music player that can process the following effects in real time.
- Time stretch (0.5-2.0 double speed)
- Pitch shift (-1 ~ +1 octave)
- 31 band equalizer
- Reverb
- AUv3 (Audio Unit v3) host

[Use cases]
- Karaoke's training. (Can be changed speed units of 10%, pitch shift in semitones easily)
- Can playback at reduced tempo to copy phrase for guitar or bass, the keyboard instrument.
- Can playback by changing the pitch to play by changing the key in the band performance (Developer himself has experience).

[Function]
- Perform time stretch (50 - 200%) / pitch shift (-12 - +12) in real time.
- 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).
- EQ preset (Abundant Built-in Presets / Custom Presets).
- 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/pitch/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 "AU Player" if available. The file is copied to this app.

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[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.
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Version History - Improved an issue where audio might not play in certain environments.
- Updated the app’s compatibility requirements to iOS / iPadOS 17.0 or later. 7.0.5 Sep 17 Added the option to switch between 10-band and 31-band equalizer views. 7.0.4 Sep 9 Fixed an issue where audio might not play under certain conditions. 7.0.3 Sep 1 Updated the system functionality. 7.0.2 Aug 27 With this update Ver.7, we changed the way this app is offered.
The app itself will now be free, and banner ads will be displayed to new users.
However, we have implemented a system to ensure that ads are not shown to users who previously purchased the app, so there is no actual change for them. 7.0.1 Aug 24 In version 7.0.0, we updated the app’s internal structure for future enhancements. We'll continue making adjustments in future updates. 7.0.0 Aug 24 Added a notice that appears when the app starts. Please take a look. 6.5.1 Aug 19 - Added Reverb effect (supports custom presets).
- Updated the 31-band EQ UI (iPhone: changed screen design; iPad: moved to a dedicated screen). 6.5.0 Aug 18 Supported Custom Equalizer Presets.
In addition to the standard presets, you can now save your own customized EQ settings. 6.4.0 Aug 14 Added support for multiple playlists. You can now switch between playlists using tabs. 6.3.0 Jul 26 Fixed issues with playback stability. 6.2.8 Mar 22 Fixed an issue where individual sorting of songs in a playlist was not retained. 6.2.7 Mar 3 Confirmed to work on iOS 26 and iPadOS 26. 6.2.6 Jan 5 Fixed minor operational issues. 6.2.5 08/17/2025 - Fixed a crash that could occur when moving the playback position during playback.
- Fixed a bug that caused the program to stop when changing AUv3 components during playback. 6.2.4 07/23/2025 Fixed file export failure for MP3. 6.2.3 04/14/2025 Fixed the file loading process. 6.2.2 03/28/2025 Fixed playback process. 6.2.1 03/20/2025 Added a search bar to the playlist screen. 6.2.0 02/13/2025 - Added "Center Emphasis" function. (Used by switching with "Center Cancel" button.)
- Added "Export" button to the top screen. (The output file reflects the values set by speed / pitch and EQ. The range specified in the loop section is output.)
(For iPhone SE models, "Export" is also performed from the [FX] button.)
- Supports displaying the player on the lock screen. 6.1.0 01/04/2025 The system has been updated. 6.0.3 07/31/2024 Confirmed on iOS 17. 6.0.2 01/05/2024 Fixed an issue where 3rd party AUv3 effects were not displayed in the list. 6.0.1 11/13/2023 Supports 31 band equalizer. 6.0.0 12/27/2022 Fixed the program in the relevant part about the fact that the app may crash during playback.
(The fix requires iOS 15 or later.)

This'll improve the frequency with which your app crashes, but we encourage you to update and try it out.

We apologize for the inconvenience, but we hope that you'll continue to use it. 5.2.0 08/07/2022