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 stars with 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 a suitable solution to fulfil the specifications for a ground-based asteroseismic network. The photon noise limited performances have been examined and compared to those of a grating spectrometer (Mosser et al.  2003) showing that this type of instrument can reach the required specifications. With a design based on a monolithic interferometer, with a compact instrument 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 stellar oscillations 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).