Pulsar Audio IPA 25

Pulsar IPA 25 is a modern dynamics processor that expands on the sound and behavior of classic VCA compressors. It combines multiple circuit topologies, a complete sidechain control section, and an integrated clipper/limiter into a single, efficient plugin for mixing and mastering.

Key Features

Multiple Compression Circuits

IPA 25 offers four fully modeled gain-reduction topologies, allowing instant changes in harmonic behavior without altering the detector response:

• Clean VCA – Transparent envelope control for detailed and accurate dynamics.
• Original VCA – Punchy and precise with smooth rounding at high levels.
• V-Mu – Tube-inspired saturation with natural low-mid bloom.
• N-Diode – Asymmetrical clipping that enhances midrange presence.

Each mode shapes harmonics at the gain-reduction stage, providing tonal variety without external saturation tools.

Complete Sidechain Control

IPA 25 treats the detector path as a creative element rather than a fixed circuit.

• Four-band visual sidechain EQ for precise frequency-dependent control.
• Punch Selector – Switch between Norm, Mid, or Loud detection focus.
• Stereo Linking – Adjust how channels share gain reduction across sustained and transient material.
• External Sidechain – Trigger compression from any source for ducking or rhythmic effects.

Adaptive Clipper / Limiter

A built-in peak-control module adds level and density without distortion.

• Limiter applies dynamic control only to overshoots, avoiding flattened transients.
• Clipper trims peaks transparently to add controlled harmonic weight.
• Modules can be positioned pre- or post-compression to fit any workflow.

Envelope and Timing Options

• Look-Ahead / Look-Behind control allows either pre-emptive or delayed response to transients.
• Feed-Forward / Feedback modes subtly change how harmonics and compression interact.
• Zero-latency tracking and high-quality oversampling modes adapt to any production stage.

Design and Workflow

IPA 25 models the RMS detection, ratio-dependent knees, and program-dependent release behavior of the best-known analog VCA compressors, extending them with precise digital control.

• Real-time visual displays show compression, spectrum, and detector behavior.
• Circuit modeling is optimized for low CPU usage, maintaining efficiency in large sessions.
• Fully resizable interface with clear signal-flow overview.

Typical Applications

• Mix Bus: Add consistent glue with control over stereo width and transients.
• Drums: Shape punch and sustain while maintaining impact.
• Vocals and Instruments: Control dynamics with character or transparency.
• Mastering: Apply precision peak control and final tone shaping.

System Requirements

macOS & Windows | 64-bit | VST3, AU, AAX | Apple Silicon & Windows 11 compatible