When comparing Resonic vs Mellow Player, the Slant community recommends Resonic for most people. In the question“What are the best audio players for Windows?” Resonic is ranked 15th while Mellow Player is ranked 27th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Portable version available
Pro Clean interface
Pro Fast
Pro Lightweight
About 8 MB, and about 11 MB with the integrated Soundfont for its MIDI playback synthesizer. Native application, no dependencies (no .NET runtime).
Pro Has a waveform seekbar and analyzers
Has a big single-click waveform seekbar and three real-time analyzer visualizations by default.
Pro Pure sound
Pro Supports all formats
WAV, BWF, RF64, AIFF, AIFC, FLAC, APE, ALAC, WV, TTA, DSF, DFF, MP3, MP2, MP1, M4A, MP4, AAC, MPC, MP+, OGG, OPUS, SPX, WMA, WMA Pro, WMA Lossless, MP4, WMV, AVI (certain codecs), MID, RMI, KAR, IT, XM, S3M, MTM, MOD
Pro WASAPI/ASIO support
High-end audio cards can be easily used to their full potential without any additional software due to WASAPI (Player and Pro) and ASIO (Pro) support.
Pro Most actions can be done with a single click
Most actions can be done without having to double-click. Things like navigating folders, playing files, seeking audio, changing volume are all done with a single-click.
Pro Native
It is written in Qt so it requires less resources than a web browser or an electron application.
Pro AppImage
It is available as AppImage so you can easily try it.
Cons
Con No playlists
Or not yet, at least in the forums they say they're working on it
Con QML
It written in Qt-QML which ignores all Human Interface Guidelines and make the app look like a web page.
Con Not native
It's using qt5-webengine which is not much different from electron / a webbrowser.