Note: Sales of SpeechStation2 were discontinued in December of 2011.

Features

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Graphic Digital Filter

SpeechStation2 provides a powerful digital filter that is programmed graphically. The frequency-domain filter, which uses FFTs in an overlap-add method, can be used to rapidly modify a file or selected segment, or to remove or emphasize a selected frequency-time rectangular region from a spectrogram. Its use is extremely simple: the inflection points of the filter response are chosen with the mouse and clicked to make as simple or complicated filter as is needed. After the user has plotted the filter, another click applies the filter to the user's choice of a selected segment, a region shown in the spectrogram, or an entire file. The filtering action is rapid; a file consisting of half an hour of speech can be filtered in a little more than two minutes.