SoloStuff updates SoloRack to v2.21 for Windows

SoloStuff has updated SoloRack to v2.21. This is a minor but important update that mainly adds a few features to the S218 Spectral Filter and fixes some nasty bugs in it.

Updates include:

• Added Extreme Quality mode to S218 Spectral Filter for CPU cooking.
• Added VariQ knob to S218 Spectral Filter for both linear phase mode and minimum phase (latency free) mode and for more interesting variable quality effects.
• Fixed polyphony problems in S218 Spectral Filter.
• Fixed improper saving of edited bars in S218 Spectral Filter.
• A few more fixes and CPU optimization in S218 Spectral Filter.