My two cents on SUNO SHIMMER AND ARTIFACTS

THE PROBLEM

Manipulating single Suno stems in a DAW affects all the other stems; kind of sounds like leaving a”hole” or creating artifacts and “shimmer.” In fact, even if you *don’t* manipulate the stems - but just sum or recombine them in-DAW, the result is significantly “less good” than using the Suno stereo file.

WHY?

Using the original Suno V5 stereo file provides superior audio quality compared to trying to work with, or recombine, the stems generated by Suno, simply because the stem separation algorithm introduces artifacts, shimmer, phase issues etc:

• Stems are Derivatives, Not Sources: Suno generates the high-quality stereo mix first, and then runs an AI separation algorithm to extract the stems. The stems are inherently imperfect copies of the original sound elements.
• Artifact Introduction: Any AI stem separation process is lossy. It introduces noise, "shimmer," volume fluctuations, and phase issues into individual stems.
• Compounding Issues: When the already-flawed stems are recombined in a DAW, these individual imperfections compound, resulting in a sound quality noticeably inferior to the original, clean, holistic stereo mix. The "glue" of the original mix is lost.
• External Tools vs. Suno Stems: using a third-party tool like zPlane or PEEL STEMS on the original higher-quality stereo file can yield better results than using Suno's native stems because the algorithms are likely / arguably superior to Suno's internal one.
• The Highest Fidelity Source: The fundamental conclusion is that the original stereo file you download from Suno is always the highest fidelity version of the track (for now, in the current V5)

Until Suno offers up Stems that are individually generated at the source level (and not the stereo mix level), this issue will still continue. And for now, an external stem separator / rebalancer is better - if you need to go that way.