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sdif2ad(1) [linux man page]

SDIF2AD(1)						  The Canonical Csound Reference						SDIF2AD(1)

NAME

       sdif2ad - Converts SDIF files to files usable by adsynt. .

DESCRIPTION

       Convert files Sound Description Interchange Format (SDIF) to the format usable by Csound's adsyn opcode. As of Csound version 4.10, sdif2ad
       was available only as a standalone program for Windows console and DOS.

SYNTAX

	   csound -U sdif2ad [flags] infilename outfilename

INITIALIZATION

       Flags:

       o   -sN -- apply amplitude scale factor N

       o   -pN -- keep only the first N partials. Limited to 1024 partials. The source partial track indices are used directly to select internal
	   storage. As these can be arbitrary values, the maximum of 1024 partials may not be realized in all cases.

       o   -r -- byte-reverse output file data. The byte-reverse option is there to facilitate transfer across platforms, as Csound's adsyn file
	   format is not portable.

       If the filename passed to hetro has the extension ".sdif", data will be written in SDIF format as 1TRC frames of additive synthesis data.
       The utility program sdif2ad can be used to convert any SDIF file containing a stream of 1TRC data to the Csound adsyn format.  sdif2ad
       allows the user to limit the number of partials retained, and to apply an amplitude scaling factor. This is often necessary, as the SDIF
       specification does not, as of the release of sdif2ad, require amplitudes to be within a particular range.  sdif2ad reports information
       about the file to the console, including the frequency range.

       The main advantages of SDIF over the adsyn format, for Csound users, is that SDIF files are fully portable across platforms (data is
       "big-endian"), and do not have the duration limit of 32.76 seconds imposed by the 16 bit adsyn format. This limit is necessarily imposed by
       sdif2ad. Eventually, SDIF reading will be incorporated directly into adsyn, thus enabling files of any length (subject to system memory
       limits) to be analysed and processed.

       Users should remember that the SDIF formats are still under development. While the 1TRC format is now fairly well established, it can still
       change.

       For detailed information on the Sound Description Interchange Format, refer to the CNMAT website: http://cnmat.CNMAT.Berkeley.EDU/SDIF

       Some other SDIF resources (including a viewer) are available via the NC_DREAM website: http://www.bath.ac.uk/~masjpf/NCD/dreamhome.html

CREDITS

       Author: Richard Dobson

       Somerset, England

       August, 2000

       New in Csound version 4.08

AUTHORS

       Barry Vercoe
       MIT Media Lab

	   Author.

       Dan Ellis
       MIT Media Lab,
		 Cambridge
		 Massachussetts

	   Author.

COPYRIGHT

5.07								    06/23/2009								SDIF2AD(1)

Check Out this Related Man Page

CVANAL(1)						  The Canonical Csound Reference						 CVANAL(1)

NAME

       cvanal - Converts a soundfile into a single Fourier transform frame. .

DESCRIPTION

       Impulse Response Fourier Analysis for convolve operator

SYNTAX

	   csound -U cvanal [flags] infilename outfilename

	   cvanal [flags] infilename outfilename

INITIALIZATION

       cvanal -- converts a soundfile into a single Fourier transform frame. The output file can be used by the convolve operator to perform Fast
       Convolution between an input signal and the original impulse response. Analysis is conditioned by the flags below. A space is optional
       between the flag and its argument.

       -s rate -- sampling rate of the audio input file. This will over-ride the srate of the soundfile header, which otherwise applies. If
       neither is present, the default is 10000.

       -c channel -- channel number sought. If omitted, the default is to process all channels. If a value is given, only the selected channel
       will be processed.

       -b begin -- beginning time (in seconds) of the audio segment to be analyzed. The default is 0.0

       -d duration -- duration (in seconds) of the audio segment to be analyzed. The default of 0.0 means to the end of the file.

EXAMPLES

	   cvanal asound cvfile

       will analyze the soundfile "asound" to produce the file "cvfile" for the use with convolve.

       To use data that is not already contained in a soundfile, a soundfile converter that accepts text files may be used to create a standard
       audio file, e.g., the .DAT format for SOX. This is useful for implementing FIR filters.

   Files
       The output file has a special convolve header, containing details of the source audio file. The analysis data is stored as "float", in
       rectangular (real/imaginary) form.

	   Note
	   The analysis file is not system independent! Ensure that the original impulse recording/data is retained. If/when required, the
	   analysis file can be recreated.

CREDITS

       Author: Greg Sullivan

       Based on algorithm given in Elements Of Computer Music, by F. Richard Moore.

AUTHORS

       Barry Vercoe
       MIT Media Lab

	   Author.

       Dan Ellis
       MIT Media Lab,
		 Cambridge
		 Massachussetts

	   Author.

COPYRIGHT

5.07								    06/23/2009								 CVANAL(1)
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