I did a version of the graphic EQ test tones for 23 bands
http://www.mediafire.com/?h7ulxyi0sdoxwwu
But there's no graphic EQ out there with 23 bands. So what gives?
I think these tones can be used to calibrate a multiband parametric EQ like Electri-Q and using these 23 tones will yield results that are indistinguishable from the method I've been using all along with pure tones (and that I tried to explain in my never-finished beast of an EQ tutorial thread...)
With testing using pure tones (especially with full size headphones) one can hear countless peaks and dips in the 6-12kHz range, such that one can never hope to EQ them all out. Never mind that the peaks and dips would shift each time you put on the phones differently. And to top it off, our pitch perception in this range isn't that good, and in music there is rarely pure tones in this range such that even if the EQ could be made that precise, it probably can't be heard. I'd experienced this myself, replacing the precisely sculpted peaks and dips of the SHE3580 EQ with a gentle curve approximating the loudness level of the general range of frequencies, and the difference in the perceived sound is minimal.
Using these files to calibrate a parametric EQ like Electri-Q is simple:
1. Download Electri-Q and George Yohng's VST wrapper and install them for foobar2000
2. Put Electri-Q into foobar's DSP chain
3. Load the group of test sounds into a playlist in foobar
4. Make 23 control points in Electri-Q with frequencies and BW settings corresponding to the filenames of the test sounds: e.g. 60 1.8.wav stands for making a point at 60Hz with BW=1.8
5. Play the 1000 1.5.wav tone and adjust the volume until it matches the volume at which you listen to music
6. Go through the list of test sounds and adjust the corresponding control points on the EQ (hold down shift while clicking on a point to change the gain / cut of each band by dragging up and down without changing the frequency by accident) until all the sounds sound equally as loud as the 1000 1.5.wav sound. Make sure that the whole EQ curve stays below the 0dB line. If boosting above 0dB is needed, create a "gain only" control point (right click on a new point->Basic->Gain only) to drag the whole curve down and increase the playback volume to compensate (so that 1000 1.5 plays as loud as before)
That's it! No need for VST hosts, audio loopback or anything and less than a quarter of the steps of the previous method!