in all liklihood 1 of two things is occurring
a) cartridge linked mistracking is occurring. If you have had the stylus for a while it could be worn out. If the stylus is low on hours of play it could be a compliance mismatch between tonearm mass and catridge. I belive the rega arms are moderate in mass, so this is unlikely for other than a low compliance (stiff suspension) stylus. Angle of the stylus is unlikely to cause... extreme geometry styluses are more sensitive to VTA change but wrong VTA generally causes loss of detail, not distortion. But adjust it if its wrong to be sure
b) tonarm resonance at the recorded frequency. If the voice is intense in the passage, like the proverbial soprano shattering glass it can excite resonance in your tonearm causing distortion.
a) cartridge linked mistracking is occurring. If you have had the stylus for a while it could be worn out. If the stylus is low on hours of play it could be a compliance mismatch between tonearm mass and catridge. I belive the rega arms are moderate in mass, so this is unlikely for other than a low compliance (stiff suspension) stylus. Angle of the stylus is unlikely to cause... extreme geometry styluses are more sensitive to VTA change but wrong VTA generally causes loss of detail, not distortion. But adjust it if its wrong to be sure
b) tonarm resonance at the recorded frequency. If the voice is intense in the passage, like the proverbial soprano shattering glass it can excite resonance in your tonearm causing distortion.