Bus Processor 670

About

Bus Processor 670 is a dynamics plugin by Softube. It is a dual-channel variable-mu tube compressor modeled on the original 670 hardware. It includes saturation controls, spatialization features, and sidechain options. Variable-mu compression uses tubes to alter gain, with the compression ratio changing in response to signal level.

What it sounds like

The original hardware adds sound and harmonic distortion even when little is done to it. At subtler settings it glues elements together in a warm way.

Features

• Dual-channel variable-mu tube compression
• Dedicated tube and transformer saturation knobs
• Calibration knob for compression-dependent saturation
• Sidechain options for filters, tone shift and mono/stereo linking
• Separate outputs for M/S channels
• Air band, mono maker and stereo widening knob

Good for

• Mix bus
• Drums
• Vocals
• Electric guitars
• Mastering