Envelope is a high-class reverb audio unit for iPhone that can be used as a standalone app, with Inter App Audio, or as an Audio Unit in AUv3 hosts like Garageband, Cubasis, or AuriaPro. Developed by Christian Siedschlag, this full version software is categorized under Multimedia and falls under the subcategory of Music & Radio.

With its true stereo reverberation algorithm, Envelope creates ultra-realistic acoustic spaces. It offers eight basic room models which can be customized in terms of size, predelay, depth, low- and high-frequency content, as well as stereo width. The software also includes a dry-wet control for adjusting the reverb intensity. To help users get started, Envelope provides a carefully designed set of presets.

Envelope has already gained recognition in recording studios worldwide as a desktop plugin and is now available for the iOS platform. It is the first effect released for iOS by DDMF, a renowned plugin manufacturer.