Mixing from 1B to 5B

How to mix this transition

Treat this as a structured key change, not a blend. Bring in the new track (E♭ Major) at a clear phrase boundary — ideally after a 16 or 32-bar section in 1B — to let the harmonic shift land with intention. Use a 4–8 bar overlap at most, keeping the outgoing track's low end and kick present through the transition to anchor the mix; kill or thin the mids and highs of the 1B track as the 5B track's fundamental frequencies take over. Avoid riding the crossfader gradually; instead, use a defined swap point where the new key's kick and bass enter decisively. The major-third interval is wide enough that layering both keys simultaneously will sound dissonant, so commit to the transition rather than hedging.