Much more than a free oscilloscope that works with your sound card...

http://www.sillanumsoft.com/

ASIO4ALL

http://en.wikipedia.org/wiki/Audio_stream_input_output

http://tippach.business.t-online.de/asio4all/intro.html

Transferring LPs to CDR: Some Advice

http://www.delback.co.uk/lp-cdr.htm

foobar2000 version 0.9 Secret Rabit Code Resampler (foo_dsp_src9)

"This is a sample rate converter plugin for the Foobar 2000 music player using Mega Nerd's Secret Rabbit Code sample rate converter. The plugin allows Foobar 2000 to play source material of any sample rate on equipment that only supports a limited number of sample rates."

A must for Foobar audio player.
http://pelit.koillismaa.fi/plugins/show.php?id=197

Accoustic Calculator Version 1.3 for free! [2.2 Mb]

--------------------------------------------------------------------------------
http://www.mhsoft.nl/user/acoustic%20calculator.asp

Creative ALchemy (X-Fi Edition) 1.00.07

For Windows Vista.

http://downloads.guru3d.com/download.php?det=1701

Digital Crossover

http://www.acourate.com/#Forum

http://www.thuneau.com/alloclite.htm
http://www.thuneau.com/allocator.htm

From Microsoft:
Audio Device Technologies for Windows.

http://www.microsoft.com/whdc/device/audio/default.mspx

Acoustic Correction and Crossover for a digital audio processing system running under Windows

http://pcazeles.perso.cegetel.net/acxo.htm

DRC: Digital Room Correction

DRC is a program used to generate correction filters for acoustic compensation of HiFi and audio systems in general.

http://drc-fir.sourceforge.net/

Make your own Power Supply.

With this software from Duncan Amps Page.

http://www.duncanamps.com/psud2/psud2_setup.exe [approx 890k bytes].

foobar latest version is out now:

http://www.foobar2000.org/

In these times more and more your PC is an audio tool.

Real time analizer and sound processor:

http://www.vb-audio.com/

You can try some FREE softwares. Like the FFX-16 i.o.p. (Input / Output Live Processing)

Audio Diffmaker

Freeware program to prove audio differences.

This software was written to investigate the possible audible differences due to "Tweaks" to audio setups,such as swapping interconnects,mains cables,electronic components such as resistors,capacitors and OP-Amps.

To Quote "Sound on Sound mag April 2008" PC Notes
Unlike ABX double-blind testing,the emphasis with Audio Diffmaker is not on whether you can reliably hear the difference between two audio files,but whether there actually IS any audible difference.

To use the software,all you do is record or load in "Reference' and 'Compare' files,in WAV format,the click the Extract button to start a complex process lasting a few seconds,that adjusts the gain and time alignment of the Compared track to best match the Reference track,before subtracting the Reference track from the Compared one to generate the Difference track.

http://www.libinst.com/Audio%20DiffMaker.htm

Enjoy.

New Creative Sound Blaster X-Fi Driver XP \ Vista

http://www.majorgeeks.com/Creative_Sound_B...ista_d4751.html