- Enable new layout with more HF bands? (probably not)
- Reduce waste when splitting at high bit-rate?
- Remove 2-phase stereo?
- fix start/end energy prediction
- Revert N=1 allocation special case?
- Revisit folding
- Can we remove the need to fold on split?
- Should we do L/R splitting?
- Should we fold the side (probably not)?
- Band-aligned folding?
- Tuning (nothing that really needs fixing, but it's still open)
- Temporal masking
- Band layout (spacing)
- qtheta offset
- delta allocation
- fine offset
- Spreading/folding parameter