Introduction: ------------- Mixer4 is an audio mixing and processing program that can be controlled entirely through a text editor. Other than a readout of peak and rms output levels, the engineer is forced to rely entirely on his or her ears. The text interface is intended to be non-distracting and non-fatiguing with intuitive commands that put the focus on listening rather than watching meters and waveforms. A no-compromise design has been used such that there are a minimum of mathematical calculations for any task and a maximum of resolution to retain detail at every step. All 24 bits from every track will affect the overall mix. There are a standard assortment of 64-bit effects for times when needed, and again, the intent is to preserve detail and clarity. But, also feel free to try some extreme settings on the compressors, for example, to achieve some incredibly smooth effected sounds. The workflow may take some getting used to since it works offline. The engineer makes changes to parameters in text files and Mixer4 produces a wave file which is then played back for review. Using a feature called preview mode, you can be hearing your changes in a matter of seconds by just working on a section of a song at a time. With a little practice you can easily make educated guesses about how much to increase or decrease track volumes, for example. The offline workflow does offer some real advantages with stability, and the ability to run multiple instances of the program on different cores and all without a dependence on a soundcard. There are some limitations to this program. Mixer4 does not edit or record audio and is intended as a supplement rather than a replacement for a full digital audio workstation. Automation is currently limited to track volumes and fades. The two reverb algorithms are only available as one instance each, either receiving individual track sends or patched into the master fader. There is no integration with effect plug-ins from other manufacturers. But, most standard processing can be done with the tools built into this application. Additionally, you will find some unique tools. For convenience, use the "fader generator" utility on large projects to make the "faders.txt" file containing the initial settings. Using a basic text editor you can organize and access all the data in your project, make templates, or add and copy effect settings. Hopefully, Mixer4 can find its way into your array of studio tools even if it is just used to mix final stems or to create submixes to be used in your main workstation software.