N W F I I R audio tools Release 0s
This is a development release of a room equalisation system, released under the GNU General Public License.
You will need the GNU Scientific Library (0.4.1, 0.5 and 0.6 tested) installed to be able to compile. ALSA (Advanced Linux Sound Architecture) is supported (sort of). The code was written for the pre-0.6 found in the CVS, but since the API was not frozen at the time of coding, it probably does not work. Contact me if you get any problems. If you do not want to use ALSA at all or it does not compile with it, simply remove -DALSA from the Makefile.
The source contains x86 assembler, so you will need an Intel processor or compatible.
Currently, all documentation is found on the web, http://www.ludd.luth.se/~torger/filter.html
When this is written (October 1, 2000) it is a bit dated though. If you have any questions, just mail me.
** NEWS **
I am currently developing a fast convolution engine, for extremely high
throughput FIR filters. The FIR filter found in nwfiir is a direct-convolution
implementation, and can therefore not reach very high throughput, despite that
it is well optimised. The drawback of fast convolution filters is that it
induces some extra input/output delay, but low delay has never been a goal
for nwfiir anyway (much delay is in it already due to buffering). This new
filter engine will not be an extension of nwfiir, instead it will be an
entirely new program. This means that this may be the last release of nwfiir
audio tools, with nwfiir being the central program.
Note: the fconv hack needs fftw (www.fftw.org) compiled with single precision floats.
Anders Torger, torger@ludd.luth.se
October 2000