The photometric instruments in space (most, corot)are going to open new insights on the knowledge of stellar interiors. However,ground-based asteroseismic observations remain justified as they can bring complementary velocity measurements, and allow the study of much more targets. A competitive instrument must make it possible the observation of a representative set of solar-like starswith magnitude down to 5, and a velocity precision as low as a few cm s-1 after 5 nights behind a 2-m class telescope. The siamois project based on a Fourier interferometer has emerged as asuitable solution to fulfil the specifications for a ground-basedasteroseismic network. The photon noise limitedperformances have been examined and compared to those of a gratingspectrometer (Mosser et al.  2003) showingthat this type of instrument can reach the required specifications. With a design based on a monolithic interferometer, with a compactinstrument easy to set up, to operate remotely with a limited data-flow, it can fit well the harsh conditions of Dome C. Main advantage, a single unit is needed due to the circumpolar position of the targets for the Doppler detection of stellaroscillations on solar-type stars.As a test bed, siamois could be put on 0.8-m class telescope like irait (Busso et al.   these proceedings).