It is worth noting that ‘sound-space’ is, in certain respects at least, much simpler than ‘colour-space’. It seems that even if there were insoluble problems in the case of colour, two people a and b could agree in all their judgements about the pitch of sounds although a heard everything five tones higher than b (that is, intuitively, if a could per impossibile hear middle C ‘through b’s ears’, a would call it ‘G above middle C’). Notice that this could be so even if both a and b had perfect pitch—the ability, that is, to state the pitch of any note just on hearing it. — Galen Strawson
that it could just be a simple unknowable fact that a’s and b’s overall experiences of sounds were five tones apart — Galen Strawson
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