There are several reasons to use a variable-bias tube compressor. One is the exceptional compression transparency that this kind of compressor can achieve, even when pushed into extreme gain reduction. Another – and perhaps the most common – is their ability to add cohesion or "glue" to buses, whole mixes and masters.
Unfortunately, the original hardware is expensive and difficult to integrate with "in-the-box" workflows. Software emulations exist but most owners of the hardware agree that they cannot be compared to the original unit, as there’s always “something” missing.
With its unique Topology Preservation Technology, Pulsar Mu sounds objectively identical to the hardware in every production context, and even makes improvements such as an increased signal-to-noise ratio.