What is the difference between Evermusic and Flacbox

Evermusic and Flacbox are two advanced music players from Everappz for iPhone, iPad, and Mac. They are built on the same foundation, so they connect to the same cloud services, media servers, and NAS drives, and they share the same interface, library, and playback controls. The difference is the audio engine and the features built on top of it. Evermusic is the broad-format everyday player, powered by Apple’s AVPlayer and Core Audio and tuned for seamless listening with true gapless playback, crossfade, spatial audio, and Apple Music library import. Flacbox is the hi-res music player, adding a professional BASS™ audio engine and direct FFmpeg decoding on top of the system player, which unlocks a custom 14-filter DSP chain, a larger real-time effects rack, MOD playback, and the widest high-resolution and lossless format support, including DSD.

Short answer: choose Evermusic if you want the smoothest all-round listening, seamless gapless and crossfade transitions, and access to your Apple Music library. Choose Flacbox if you are an audiophile who wants deep sound shaping (an effects rack and a DSP chain), a selectable professional audio engine, and maximum hi-res and lossless format coverage, including DSD, APE, and WavPack.

Feature Comparison Table

Playback Engines

Evermusic plays your music entirely through Apple’s native audio stack: AVPlayer for playback and Core Audio for real-time processing. Core Audio is what drives its effects, equalizer, gapless handoff, and spatial audio. It uses no third-party decoders.

Flacbox keeps the Apple system player and adds two more engines for audiophiles: FFmpeg for direct, wide-format decoding, and a selectable professional BASS™ audio engine. When you switch to the BASS engine you unlock the full audiophile toolkit, including the real-time effects rack, the 14-filter DSP chain, high-quality resampling, independent pitch and tempo, and tracker/MOD playback. Having three engines to choose from is a Flacbox-only capability.

Supported File Formats

Evermusic plays the formats decodable by Apple’s AVPlayer and Core Audio, which covers the vast majority of everyday libraries: MP3, AAC, M4A, M4B, ALAC, FLAC, Ogg Vorbis, WAV, AIFF, AC-3, CAF, MP4, AMR, and more. FLAC and Ogg Vorbis support were added in recent updates.

Flacbox decodes everything Evermusic can, and then extends much further through FFmpeg and the BASS™ engine. On top of the common formats it natively targets DSD (DSF and DFF), APE, WavPack (WV), TTA, OPUS, WMA, and Musepack (MPC), alongside FLAC and ALAC, for a total of 50-plus supported extensions. It is the right choice for high-resolution and lossless collections, and it is the only one of the two that plays tracker and module music (MOD, XM, IT, S3M, MTM, UMX, MO3).

True Gapless Playback

Evermusic provides true gapless playback: no pause, click, or tick between tracks. The engine keeps two tracks live at once, pre-buffering and decoding the next song while the current one plays, then hands off between audio samples on a continuous ring buffer. This is ideal for live albums, DJ mixes, and concept albums.

Flacbox does not offer gapless playback. If seamless track-to-track transitions matter most to you, Evermusic is the better fit.

Crossfade Playback

Evermusic supports crossfade with an adjustable duration from 1 to 30 seconds, so one track blends smoothly into the next.

Flacbox does not support crossfade.

Real-Time Audio Effects

Both apps process effects in real time on anything you play, including cloud streams and internet radio, with no re-encoding.

Evermusic ships 6 effects, built on Core Audio: Reverb, Delay, Distortion, Compressor, Crossfeed, and Volume normalization.

Flacbox ships 11 effects, most of them running on its BASS™ engine with deep per-effect parameter control: Reverb (Freeverb), a Multi-tap echo, Chorus, Flanger, Phaser, Auto-Wah, Distortion, Compressor, Stereo rotation, Crossfeed, and Volume normalization. If you like sculpting your sound, Flacbox has the larger and more capable effects rack.

DSP Chain

Flacbox includes a build-your-own DSP chain of 14 real-time filters that you can add, remove, and reorder: Gain, Low-pass, High-pass, Band-pass, Notch, Peaking, Low-shelf, High-shelf, Soft-clip saturation, Bit crusher, Tremolo, Delay, Ring modulator, and Stereo width. Use it to correct a room, tame a harsh recording, or design a completely custom tone.

Evermusic does not include a DSP chain. This is a Flacbox-only, audiophile-focused feature.

Music Visualizer

Both apps include a real-time, full-screen music visualizer that reacts live to your audio, with a large library of presets you can pick from or let cycle. It runs on iPhone, iPad, and Mac.

Volume Normalization

Both Evermusic and Flacbox include loudness-based volume normalization using the EBU R128 (ITU-R BS.1770) standard. Unlike ReplayGain, it needs no tags and does not modify your files, so it keeps tracks at a consistent volume even on cloud streams and internet radio.

Pitch, Tempo, and Spatial Audio

Evermusic offers spatial audio and advanced time-pitch algorithms (time-domain, spectral, and varispeed) for high-quality tempo and pitch processing on Core Audio.

Flacbox offers independent pitch and tempo control through its BASS™ engine, letting you change speed without changing key, or key without changing speed. It does not include spatial audio. Both apps let you adjust playback speed.

Output Control

Both apps let you choose a custom output sample rate, configure output channels, and pick default or mixed output modes. Flacbox adds a preferred IO buffer duration setting for finer low-latency control, in keeping with its audiophile focus. Both include a 10-band graphic equalizer with presets, preamp gain, and preset import and export.

Connections (the same in both apps)

Because Evermusic and Flacbox share the same connection layer, these work identically in both:

• Cloud storage: iCloud Drive, Google Drive, Dropbox, OneDrive, Box, MEGA, pCloud, Internxt, Proton Drive, Yandex Disk, MediaFire, Cloud Mail.ru, HiDrive, OpenDrive, Put.io, MyDrive, InfiniCLOUD, WD My Cloud Home, Baidu Cloud, and more.
• Media servers: Plex, Subsonic, Navidrome, Jellyfin, and Emby.
• Computer and NAS: SMB, WebDAV, DLNA, FTP, SFTP, and NFS, with native support for QNAP, Synology Drive, Nextcloud, and WD My Cloud Home.
• USB, local, and Wi-Fi: SD cards and USB flash drives through readers like the SanDisk iXpand, iTunes File Sharing, and wireless Wi-Fi transfer.
• Casting and Cars: Apple CarPlay, AirPlay, and Google Chromecast.
• Library and tools: Home Screen widgets, embedded and timed lyrics, a built-in ID3 tag editor, Last.fm scrobbling, offline downloads, and a full file manager.

The one connection difference: Evermusic can import and play your Apple Music / iTunes library, while Flacbox focuses only on your own files from cloud, network, and local sources.

What Should You Choose?

Choose Evermusic if you:

• Want the smoothest everyday listening with true gapless playback and crossfade.
• Use spatial audio.
• Want to bring in your Apple Music / iTunes library alongside cloud files.
• Have a large, mixed collection and want a fast, no-fuss player.

Choose Flacbox if you:

• Are an audiophile with a hi-res and lossless library (FLAC, DSD, APE, ALAC, WavPack).
• Want a selectable professional BASS™ engine or FFmpeg engine.
• Want an 11-effect rack and a 14-filter DSP chain for deep sound shaping.
• Want to play tracker/MOD music, or need finer low-latency output control.

Many listeners use both: Evermusic for daily, seamless playback and Apple Music library access, and Flacbox for critical, high-resolution listening with full sound control. Both are free to download with optional Premium upgrades, and both connect to the cloud accounts you already own.

Frequently Asked Questions