Feel the power of music.

KaiserTone contains the "Amazing Quality Sound Engine AQS-Xa”. This high-speed sound engine makes use of over 64000 frequency bands to deliver the very highest quality audio. Sound Engine AQS-Xa provides an equalizer, virtual surround, cross fader, gapless playback, silence detection, noise reduction, and a dynamic limiter, to allow you to listen to your favorite music at your preferred sound quality.

KaiserTone plays music files stored on the iTunes library and in the high-resolution music database (HiRes DB).

Supports High-resolution sources:
1) playback of high-res sources up to 768kHz/32bits
2) PCM and DoP (DSD over PCM) playback of high-res DSD files up to 12MHz/1bit.

Supported audio format:
- iPod Library(iTunes): audio format used by Music App of Apple
- Hires DB: DSD(2.8MHz~12MHz/1bit, .dsf, .dff), FLAC(8k~384kHz/8~32bit), WAV(8k~768kHz/8~64bit), Apple Lossless(8k~384kHz), AIFF(8k~768kHz/8~32bit), AAC(8~320 Kbps), MP3(8~320 Kbps), MP4(as Sound), M4V(as Sound)

Compatible models:
iPhone X, 8, 8Plus, 7, 7Plus, 6s, 6sPlus, 6, 6Plus, SE, 5s, 5c, 5, 4s, iPod touch 6, 5, iPad Pro, Air2, Air

Playback Options:
- 6 modes of continuous playback (include Medley)
- Music shuffle
- Spectrum analyzer (stereo split, bandwidth resolution, persistence, etc.)
- Speaker, headphones, Bluetooth, AirPlay, and dock
- SNS posting (iOS11 or later, Twitter, facebook, Line, Mail(Manual))
- Sleep Timer from 10 minutes up to 8 hours.

Sound Quality Effect:
- Presets equalizer: Normal, Perfect, Eargasm Explosion, Rock, Rap, Metal, Country, Jazz, Acoustic, Classic, Blues, Oldies, Reggae, Opera, Speech, Bass, Mid, Treble
- Graphic equalizer:(5 Band, 10 Band, 20 Band, 30 Band, Spline curve 16k, 32k)
Range: -12dB ~ +12dB. (Minimum Step: 0.1, 0.5, 1.0dB)
Six types of equalizers for your enjoyment:
○ Beginner: 5 Frequency bands: 100Hz-8KHz
○ Average: 10 bands: 32Hz-16KHz
○ Expert: 20 bands: 32Hz-22.62KHz
○ Master: 30 bands: 25Hz-6.3KHz
○ Spline Curve: Customizable frequency band range
 16k: 32Hz-16KHz, 32k: 16Hz-32KHz
- Virtual surround sound presets
- Digital Output (Max 768kHz/32bit)
- DoP output v1.0/v1.1
- "Prevent the head cutting" for DAC (0 to 3.0 seconds)
- Up-sampling with integral multiples settings

- Fine volume control
- Left and right balance control
- Gain adjustments

Music Selection
- Playback music from the iTunes Library and the HiRes DB.
- by artists, albums, songs, genres, playlists(Create/Delete), Compilations, Composers, SampleRates and Formats.
- "Shuffle" play can be selected from the song list.
- "All songs" has the top of the artist and album lists.
- Songs can be searched from the artist, album, and song listings
- “Album artist” settings in the general settings
- Grid View (Available on iPhone5 or more)

- Customize the design with 24 different colors
- Silence detection (Automatically skip silences lasting 3 or more consecutive seconds.)
- Automatic dynamic limiter, noise reduction
- Spectrum analyzer (stereo, bandwidth, color, etc.)
- Crossfade (0 to 20 seconds)
- Pause Fadeout (0 to 1.0 seconds)
- Album art view swipe action settings
- Player orientation settings (auto, lock to portrait/landscape)
- Edit the music selection tags

- 7 Virtual surround sound presets (live Reverb)
- Control playback with headphone buttons and Bluetooth
- Supports output with speakers, headphones, Bluetooth, AirPlay and docks
- Album art display
- Gapless playback
- Auto pause on unplugging headphones / receiving a phone call
- Background playback
- Display lyrics when included in the song file
- importation to the HirRes DB by iTunes and AirDrop, a file by Files app on iOS11 or later

Notes :
* It cannot play a track with DRM protected, a track downloaded from Apple Music or a track with compression dff file.
* However, On iOS 10 or later, DRM and iCloud data can be cooperative played back with the restriction function by Music app.
* Only Playlist created in this app can be deleted

What's New

Version 2.9.8

■Latest update
1. Improvement of ease of use
(1) Added a function to quickly display the selection screen of "this artist" or "this album" from the information of the playback song. (Press "PLAYER VIEW -> PLAYBACK Track Title")
2. Adjustment of music selection screen
(1) To the same name (title, album, artists etc) on the music selection screen, Adjusted the search method for with or without "The".
(2) Adjusted the display position in the list of music selection screens after iOS 11.
3. Adjustment of sound engine AQS-Xa.
(1) Optimized sound quality and efficiency of sound engine when connecting device.
(2) Optimized the volume after changing the left and right volume balance while playing a monaural sound source.
4. iOS support
(1) Adjusted on iOS 11.4, and checked operation
5. Fine-tuning and other enhancements.

■ In iOS10 or Later, at the time of the first start-up,
alert of "“KaiserTone” Would Like to Access Apple Music And Your Media Library" is displayed.
At that time, “OK” should be selected for using a song in the iPod Library.

This player uses to playback musics in the iPod Library (iTunes Library).
This library is the data in the media library. In order to use the songs in the iPod Library, this question should have been set to "OK".

※"Don't Allow" was selected, it can not display all the songs in the iPod Library.

■ Resetting Method
Go to the Apple Settings app, Scroll down and Tap the KaiserTone, Enable Media Library toggle.

Ratings and Reviews

4.6 out of 5

29 Ratings

29 Ratings

The Best! The updates keep coming!


I love that they keep this app updated, adding things, working out bugs.. Last update fixed that sound cut off bug every time the shuffle button was pressed while playing music. The sound would abruptly cut off then back on, just a second but really noticable.

However there's something wrong with the player window that's viewed when the phone is locked. I'm not sure if it's the app or iOS but, the mini player that's used when locked doesn't update nor is it responsive. It'll show the name of a song I played days ago and it stays that way. The buttons do not respond, the only way it works again is if I reset the phone. I hope you guys can replicate this bug on your end, let us know if it's iOS. Thank You for this amazing app!

Kaisertone is a must have!


If you are looking for a app that has non-destructive EQ options, plays high-res music, a fun app that you can change the appearance and have lots of other options to play with...get this app. This is my main music app that I use. I also have the Relisten app which is wonderful! But it doesn’t have custom EQ options. The Kaisertone app is very easy to navigate and works and that’s what I needed. One of the options that I love is the graphic EQ that plays in real-time.

Great job Kaisertone team!
August :)

Finally The App I Was Looking For


I have bought every music app there is trying to find the perfect app for my music.
I finally found the perfect app that makes my music sound the way I want it to sound.
The sound engine and equalizer in this app is everything a music lover could want this app is well worth the money.


CyberFort LLC
31.7 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Japanese
Age Rating
Rated 4+
© CyberFort LLC


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