Alas, my shouting success was limited. It’s hard to project anger at a foam mat. But somewhere along the way I seem to have spontaneously developed a head-voice vibrato, not sure how come. Probably a sign that my head is becoming increasingly hollow.
Besides that, I have a new pre-amplifier which works better than the previous one, but has a markedly different noise pattern that I yet have to get used to. If my voice sounds different, that’s probably why. That, or the hollow head.
(Soundcloud version here.)