Faded Music Not Restored

[Enthalpy]

When an audio track is faded and played again, the track has the faded volume, not the original volume. So for an example, if you play Track A, fade it out to silence, and play Track A again, you will hear nothing because it is at volume zero.

[Enthalpy]

Fix #194 and #195

→ <<cset fd6aa7eb177d>>