When comparing Winamp vs Mellow Player, the Slant community recommends Winamp for most people. In the question“What are the best audio players for Windows?” Winamp is ranked 5th while Mellow Player is ranked 27th. The most important reason people chose Winamp is:
Modern features are essential for power listeners nowadays, proving that Winamp (while an old app) still offers features users look for in a modern player.
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Pros
Pro RSS, Atom Podcasts, and Internet Radio streams (among other modern features) are available
Modern features are essential for power listeners nowadays, proving that Winamp (while an old app) still offers features users look for in a modern player.
Pro A huge selection of skins are available
Winamp allows skinning the interface and there are thousands of community created skins available.
Pro Functionality can be extended via plugins
A wide variety of DSP, input, and visualization plugins have been created by the community.
Pro Great search and Playlist functionality
Considerable functions to search and develop playlists.
Pro Good sound quality
The sound quality of Winamp is good, especially with DSP plugins like enhancer.
Pro HTTP streaming support
HTTP streaming is necessary for both live and on-demand content, which it can deliver without lengthy buffering or waiting periods. It is also less susceptible to network hiccups than other forms of streaming.
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 Relatively poor quality audio
Compared to other players, Winamp doesn't offer high quality audio.
Reason for Winamp's lesser audio quality compared to other modern audio players is that it uses deprecated audio output interfaces (APIs). In fact since Windows Vista onward, those APIs Winamp is using (such as DirectSound, WaveOut) are emulated in software mixer for compatibility purposes further distancing the audio path from the hardware.
Modern audio players support modern WASAPI audio output for direct access to the audio hardware (especially in WASAPI exclusive mode). For more info see Wikipedia's entry on DirectSound.
Con No Major updates
There are no major updates since version 5.
Con Heavy
At the beginning it was simple to download and install, now it has so many things it became very heavy to download.
Con Cluttered interface
With all controls, skins, and options it's hard to find the basic commands.
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.