Scyllascope Docs

Instance Sidechain ​

Instance Overlay

Scyllascope instances can communicate with each other. By selecting another instance in the Context Menu, its waveform is sent as a sidechain signal and displayed as an overlay on top of the current waveform. This makes it easy to visually compare two signals side by side — for example, a kick drum and a bass line on separate tracks.

Options ​

  • SC from instance — select which instance to overlay. The list shows all active Scyllascope instances by name.
  • Colorize — uses the track color from the DAW for the overlay waveform (VST3 only).
  • Sum — displays the sum of both signals instead of showing them separately.

Sum mode

  • None — disables the overlay.

TIP

Linked instances must share the same Division setting. Since version 1.2.6, this is handled automatically.

Sidechain priority ​

If multiple sidechain sources are available, the priority order is:

  1. Side2SC (side signal as sidechain)
  2. Instance sidechain (selected in context menu)
  3. External sidechain (routed to inputs 3/4)

Use cases ​

  • Kick and bass relationship — overlay the kick drum and bass line to check how they sit together, spot phase issues, and fine-tune sidechain ducking.
  • Sum check — use Sum mode to preview what two signals look like combined— useful for catching phase cancellation.