Comrade definition, a person who shares in one's activities, occupation, etc.; companion, associate, or friend. See more.
RetroArch is a multi-system emulator for Linux, Windows, Mac OS X and *BSD. It is formerly known as SSNES. Its design and background is quite different than most other emulators as RetroArch does not implement an emulation core itself. RetroArch talks to libretro, a generic emulator core API. This means that RetroArch is core agnostic, and it does not care which emulator core is running. Currently there are libretro implementations for systems such as SNES, NES, GBA, GB/GBC, Genesis, and even arcade games (Final Burn Alpha). libretro isn't only usable for emulators.
A demodulator is a circuit used in AM (amplitude modulation) and FM (frequency modulation) receivers to separate the information that was modulated onto the carrier from the carrier itself.It could be audio and/or video information, or other data. A demodulator is the analog of the modulator. A modulator modulates the carrier frequency, while a demodulator detects the modulation on the carrier wave and recovers the original lower frequency waveform at the destination.   For many years the modulated carrier wave was converted to a radio signal.