SPC700 sound format
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SPC700 sound format
An SPC700 sound file (or SPC) is a type of video game music file consisting of a copy of scores and music data from RAM used by the SPC700 sound chip on the Super Nintendo Entertainment System or Super Famicom (though such data are usually obtained from a console emulator such as ZSNES or Snes9x, rather than from the system itself). The SPC700 chip (or emulator thereof) produces sound by executing the embedded program, which processes the stored music data and transforms them to a sequence of DSP commands issued to the chip, which in turn produce the audio output in accordance to the DSP commands. The capabilities of the SPC700 DSP commands allow for music synthesis by samples (analogous to MOD or IT music playback), allowing long stretches of audio which would likely take up several megabytes—even hundreds, for particularly lengthy pieces—if stored as a digital waveform (using PCM or similar), to be produced from only 64 kilobytes of data. The SPC700 chip produces 16-bit sound at 32 kHz, but SPC700 emulators generally can be reconfigured to output at a different sampling rate (from 8 to 48 kHz).

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