These are Equalizer (EQ) presets for use with the foobar2000 desktop media player for Windows. They appear to be old Winamp presets, I’m sure they’d work there as well.
Volume² is an freeware app which is an advanced Windows volume control, a complete replacement for the default Volume Control on Windows. This application lets you easily change the sound volume just by rotating the mouse wheel or by using keyboard hot keys or just mouse move on screen border. The app comes with customization themes and interface and also other options like setting hotkey for changing volume.
Multitone Analyzer is an app designed to explore audio electronics performance by producing quick measurements using a simple loop-back configuration. MA produces a specific set of test tones that are sent to a digital-to-analog converter (DAC) that are then passed through one or more analog components and then received by MA and analyzed. MA both, plays the signals and records them for analysis. DAC and ADC are required for this to work.
Measurements that MA can produce: TD+N, IMD, N+D, delay, clock drift, frequency response, etc.
Audio support for WASAPI, ASIO, and Direct Audio devices with sampling rates of up to 384kHz/32 bits
Test signals: arbitrarily large multi-tone signal, simple sine waves, two-tone IMD test signals, 3-tone IMD test signals, square wave, triangle wave
FFT sizes of up to 1M
For distortion measurements a range of frequencies to measure can be selected
The Audio File 