Do the Singers have perfect pitch?

[Silverblade5 he/him]

In the most recent chapter, Rlain was talking about how humans cannot sing the "pure notes of Roshar". This seems to imply knowing intrinsically where "pure" would be. Do the Listeners and Singers have perfect pitch?

[Flyingbooks]

The "pure notes" quote probably refers to being able to attune to the Rhythms, so it doesn't automatically mean that the Singers have perfect pitch. However, I think it is likely because they're able to copy the Rhythms precisely and because it seems to fit thematically.