The Flux Mastering Pack 1.1 Processing Plug-in Bundle is a collection of six signal processing plug-ins intended for mastering engineers. The collection includes Solera II, Pure Limiter II, Elixir V3, and Epure V3 (Native), as well as the Stereo Tool and Bittersweet II freeware plug-ins.
Solera II includes four independent envelope generators that can be applied in parallel and simultaneously. The plug-in consists of a compressor, de-compressor, expander, and de-expander. It features analog-style metering with RMS values, an "Angel's Share" parameter to automatically relax the compressor section based on the signal, and a "Hysteresis" parameter that enables both compression and de-compression of the signal independent of the sound level. The auto-release section of the device utilizes a unique algorithm to avoid the pumping effect often heard in other compressors. You can insert a delay line into the signal path to create a null attack time, and the software's A/B compare and morphing features allow you to rapidly adjust parameters to shape your sound. The dry mix section of the device enables you to precisely dial in the amount of processing applied to the signal.
Epure V3 (Native) is a 5-band graphic equalizer, wherein each band spans the entire frequency spectrum and offers ± 24 dB of gain with the option to multiply the gain by 2, divide it by 2, or invert the gain by flipping a switch. Each band allows you to select from low cut, low shelving, peak, high shelving, and high cut filtering across the entire bandwidth with adjustable Q from 1.00 to 100.00, internal input/output routing, and a bypass function. For convenience, you can copy and paste the 20 settings of each EQ slot from one to another. The plug-in can process up to eight channels simultaneously for multichannel and surround sound support.
Pure Limiter II is intended to be the last processing element in your signal chain. It generates an artifact-free release envelope over your signal. This allows you to increase the average audio level without damaging the perceived audio quality. You can apply the peak limiting automatically, manually, or with advanced controls over every processing parameter. Dual display modes allow you to juxtapose the unprocessed and processed signals or show the limited waveform, the action of the limiter, and a histogram of the release value. It can process audio at up to 384 kHz sample rate on up to 8 channels at a time.
Elixir V3 is a multi-channel true peak limiter designed to increase output level in compliance with ITU0R.BS 1770 and EBU R128 conventions for broadcast, post-production, and mastering. You can select the type of algorithm to do the limiting, and break up the process into multiple stage limiting for even more precise control. The plug-in is built around a 64-bit architecture and utilizes the OpenGL graphics standard to make the most out of your computer's GPU. Depending upon the host environment, the new version offers a 500 to 1000% processing improvement over the previous version. To reduce artifacts like aliasing, the algorithm utilizes an oversampled reference of the audio to define the gain envelope and then applies the processing to the original signal.
In addition to these mastering plug-ins, the bundle also comes included with Flux's Stereo Tool and Bittersweet II Transient Designer freeware applications.