- This article is about the audio format. For the Atari graphics format, see Spectrum 512 formats. For the certificate format, see PKCS7 certificate.
SPC is an audio file format designed for playback of native audio from the Super Famicom / Super Nintendo Entertainment System. SPC files commonly have the extension .spc.
The format generally consists of four main sections - a file header; a section containing SPC700 register data; an ID666 tag in either text or binary format, containing metadata about the file; and a final section containing RAM and DSP register data. In addition, there may be a fifth section containing Extended ID666 tag data.
There is also a packed / grouped format for SPC files, where groups of files are packed as a solid archive using RAR. This commonly uses the extension .rsn (RAR Super Nintendo)