Library Prev Chapter 3. More advanced waveform processing is performed by the signal processing library. If set to raw, this indicates that the input file does not have a header. While this can be used to specify file types other than raw, this is rarely used for other purposes as the file type of all the existing supported types can be determined automatically from the file's header.
Waveforms can have multiple channels.
This option extracts a single channel for progcessing and discards the rest. If not specified output is to stdout. If no type is Specified the type of the input file is assumed. Increase or descrease the amplitude of the whole waveform by the factor given -scaleN float Scaling factor with normalization. The waveform is scaled to its maximum level, after which it is scaled by the factor given -lpfilter int Low pass filter, with cutoff frequency in Hz Filtering is performed by a FIR filter which is built at run time.