Audio Engineering

2. Mixing Imbalances (The "Car Test" Analytics)

• The Muddy Low Mids (200Hz - 500Hz): If a track sounds "boxy," scoop this area on the kick or bass synth.
• The Harsh Highs (2kHz - 5kHz): The most sensitive range for human hearing. If hi-hats or vocals are piercing, use dynamic EQ or a sidechained multi-band compressor here.
• Sub-Bass (20Hz - 60Hz): Check for phase cancellation. Ensure the kick and bass aren't fighting in the center channel.

3. Dolby Atmos & Spatial Audio

• The New Standard: Apple Music heavily favors (and pays higher rates) for Spatial Audio / Atmos mixes.
• Binaural Rendering: Atmos mixes must translate back to headphones via binaural rendering. Always check the binaural metadata.
• The Center Channel: Keep the lead vocal anchored in the center (Phantom Center or discrete C channel). Don't spread the low end too wide; keep the sub isolated to the LFE channel.

4. indiiOS App Integration (Audio Intelligence)

• Ingest Essentia.js readouts (BPM, Key, energy levels, tonal balance).
• Provide users with actionable feedback on their masters inside the indiiOS audio lab before they submit to distribution. Let them know if their LUFS is dangerously low (-18) or dangerously high (-6) compared to industry norms for their genre.