Rast Sound Cusp Transient Shaper Plugin Launches with Intro Price

Rast Sound has released Cusp, a transient shaper plugin designed for music producers who need separate control over the attack and sustain of their audio. This new tool targets drums, percussion, bass, vocals, loops, and even mix bus or mastering duties. It works on macOS 12+ and Windows 10+, supporting VST3, AU, and AAX formats.

Cusp distinguishes itself by letting you shape the hit and the tail independently, each with up to ±10 dB of adjustment. Moreover, it includes a Drive section with three character options — Edge, Iron, and Tape — that can be applied to the hit, the tail, both, or neither. This flexibility allows for subtle or aggressive sound design without affecting the whole signal.

Core Features for Transient Control

The plugin offers a sensitivity, knee, and release detector controls, giving you precise handling of how the transient is detected and shaped. Additionally, you can work in stereo, mid, or side modes, which is handy for advanced mixing. A live shape display with per-lane mute helps you visualize changes instantly. Delta monitoring lets you audition only the processed signal, making fine-tuning easier.

Cusp also ships with factory presets organized into Essentials, Drums, M/S, and Character categories. These presets are useful starting points for various musical contexts. The interface is straightforward, so even new users can navigate it without confusion.

Regarding performance, Cusp is lightweight and efficient, suitable for session use. The plugin does not require an iLok or dongle, and it comes with a clear license for two machines. This makes it practical for producers with multiple setups.

In terms of limitations, Cusp operates only on Windows and macOS, with no Linux version. Furthermore, the ±10 dB range might feel restrictive for extreme transient shaping, though it encourages subtlety and musicality.

Pricing and Availability

Cusp is available now at an introductory price of €39 until August 30, 2026, after which it will cost €79. To get started, you can download a demo from the Rast Sound website. The plugin is sold directly, and there is a 30-day money-back guarantee.

Rast Sound has built a reputation for creative tools, and Cusp continues that trend. For producers seeking precise transient control with character, this plugin offers a compelling package at a reasonable price.

Features