In a conversation back and forth with William J Hall about FFB's, I told him
I'd upload a software filter bank I wrote that can process .wav files, so I
might as well put it out there for others too. It's basically kind of what
I wanted to consider doing in hardware that was discussed many months ago
but had one member argueing against it. It's a 48 band WYSIWYG raised
cosine filter bank that's similar to those Perfect Q, and True Curve EQ's by
Rane and Behringer, but instead of just 3 bands/octave and +/- 12dB
cut/boost, it's 6 bands per octave and covers the full 96dB range. Link is
below, it's only 74K and doesn't modify your registry or spray hundreds of
files all over your drive and system folder and cause other things to stop
working.
http://home.att.net/~synth6/SoundApp.exeWhat you need:
PC computer with 1280x1024 or larger display and enough RAM to handle 4
times the size of the .wav file you want to load and process. Wav files can
be mono or stereo, but need to be 44.1KHz and with no extra header info
(like your name, or markers) beyond the usual 44 bytes. I've only run it on
XP, but it should probably work on anything back to Win95.
How to use it:
Copy or move the app into any folder that contains .wav files. Run app and
select a wav file from filebox. It should be easy to follow after that, you
just press keys for the menu items, but just to point out the obvious: [4]
gets you to the 48 band filter bank page. Use the mouse to draw your filter
points on the graph, then hit the [f] key to filter the file, you can then
listen to it, or undo it and try again. If you want to keep the file you
processed, just hit the [w] key to write out a wav file called Output.wav.
Rename it to what ever you want. If you want to load another wav file, you
need to quit the app and run it again. There are other options on the
filter page too, plus some unrelated things on the waveform page. There
you'll find a couple of useful sharpening options for giving lots of crisp
highend detail to dull recordings. At some future date, I'll probably
replace the menu keys with buttons for mouse clicking, but this is just my
prototype app where I test out ideas. It's recommended that you avoid
trying to click on the desktop or other windows while my app is running as
it won't redraw the screen when returning back to it.
-Elhardt
Bahn Audio Systems