How do I fix a song that sounds flat, muddy, or weak in the bass?

A single restoration model may not fix every problem. If the track sounds flat or weak in the low end, try a stem-based workflow:
  1. Split the song using the 4-stem preset.
  2. Select the bass stem.
  3. Enhance it with Neural Remix.
  4. Use EQ to boost or clean the low end if needed.
  5. Blend the processed version with the original if the result is too strong.

UniverSR is better for missing high frequencies. Neural Remix and EQ are often better starting points for bass, muddiness, or low-end problems.