We had to do a "laboratory test" on a free subject for our university class, and I did a test with my schoolmate Anu on the effect on the age of the strings. What happaned was that one of my strings snapped on my guitar, and the strings were like 2 months old, so we recorded a clip with both clean sound (with slight distortion on the amp) and with high-gain distortion and then changed the strings. With bass we recorded a clip with year old strings, then we boiled them in hot water for a good 20 minutes. Then we also analyzed the difference in the spectrum analyzer and noticed that in the 0-2khz area there was no major change at all, but on the 3-16khz range the clarity increased a lot, like on the 8khz region in the DI track the difference was as much as 8dB. Even if you can't see the difference in the spectrum, you could still clearly HEAR the difference, which is the main point of the test anyway. Files: http://dl.dropbox.com/u/1338211/Kielitesti.zip (~52 mb) Order on the clip is (but I highly suggest that you import the clip into a DAW anyways for better comparison): old guitar strings - clean old guitar strings - distortion new guitar strings - distortion new guitar strings - clean old bass strings - clean boiled bass strings - clean Amps used: Mesa Dual Rectifier (Clean channel and Red channel) and 2x12" cabinet with V30's, Orange Crush 1x15" bass amp to Röde M3 mic to M-Audio ProFire 610. The playing and amp settings on the clips is irrelevant, as the settings and mic position were not changed and main point is just to demonstrate the difference in the sound. What I was surprised about was that even tho I didn't have much gain on the Red channel (about 1 o clock), the difference in the tone compared from old to new strings was really minimal. But I did have the tone setting on the tubescreamer at about 10 o clock, so that also helped in "evening" the sound of the new strings compared to the old strings. Comments?