Well, that isn't my experience. Regardless of the chip set used, it's the entire product including the drivers that will determine the performance.
My suspicion is that these devices run at a fixed sampling rate, and that resampling to the rate requested by the software is carried out by the drivers. Resampling can be done accurately, at high CPU cost, or less accurately but more quickly. Any resampling is undesirable, but its effect may not be very noticeable with the slower digital modes because if a weak signal doesn't decode you may think that's just because it is weak. Personally I don't think it is worth economizing in this area. And no, I don't have shares in SignalLink. Julian, G4ILO --- In digitalradio@yahoogroups.com, Peter Frenning <pe...@...> wrote: > > In my experience most of the inexpensive USB sound devices I have tested > contains either the C-media, "USB Headphone Set" or "USB Audio Codec" > chip sets, all three yields a signal to noise+signal span of at least > 100dB (I've seen as high as 112dB). In any case they are more than good > enough for the most demanding digital modes - even EME! > >
