GIG is the file extension associated with a software sound sampler software called GigaSampler (now GigaStudio). GIG files are files that were used to store sound samples with a bit resolution of 8, 16 or 24 bits. These were sounds recorded in the mono system (one sound channel).

GigaSampler is software developed for Windows by Tascam. Currently, the GIG format is rare and considered obsolete.