Note: this page is heavily biased towards audio-specific applications
of DSP, since that is my area of interest.
DSP FAQs, source archives, book reviews, etc.
The comp.dsp FAQ -- answers
questions about everything from theory to software.
Iowegian's dspGuru -- featuring
FAQs, tricks, source code, books, etc.
The Music-DSP
email list homepage -- has instructions on how to subscribe, a FAQ, a
mailing list archive, a source code archive, books reviews, links,
etc.
Julius O. Smith's Digital
Audio Resampling Home Page -- info. on an approach to sample rate
conversion.
Harmony Central's Audio Programming page -- lots of code, tools, resources, references, etc. for writing code to manipulate audio.
DSP-related
Open/Free Software
OpenDSP --
"OpenDSP (sm) is dspGuru's initiative to promote the use of "open"
software within the DSP development community. DSP developers already
use open software, of course, but it can be hard to find, and it does
not always meet developers needs in a systematic way. We hope to
change all that." [OpenDSP includes reviews of (and links to) several
free MATLAB clones.]
SoX - Sound
eXchange -- "the swiss army knife of sound processing programs.
SoX is a command line utility that can convert various formats of
computer audio files in to other formats. It can also apply various
effects to these sound files during the conversion. As an added
bonus, SoX can play and record audio files on several unix style
platforms." [And, as another added bonus, you can download the source
code.]