Can ghost sound be used to bypass arcane spell failure for verbal components?

Question

My level 6 magus has just been magically transformed, his mouth and tongue becoming weird. This causes a 15% arcane spell failure chance, and, when combined with the 10% from my armor, is a dangerously high 25%. (The kensai archetype removes the standard magus's ability to cast in armor without penalty.)

One of my cantrips is ghost sound, which allows me to create the sound of people talking and stuff. Could I use a successfully cast ghost sound spell to cast other spells with vocal components to avoid the 15% arcane spell failure for having Cthulhu-mouth?

Answer 1

The spell ghost sound is of no help here

The description of verbal components says

A verbal component is a spoken incantation. To provide a verbal component, you must be able to speak in a strong voice. A silence spell or a gag spoils the incantation (and thus the spell). a spellcaster who has been deafened has a 20% chance of spoiling any spell with a verbal component that he tries to cast.

While the spell ghost sound can create an audible illusion of a creature casting a spell, this illusion is no substitute for you speaking in a strong voice.

I urge you to find soon someone capable of reversing this transformation your character's undergone unless there's an especially desirable upshot to it. Or, if the transformation's permanent, consider the feat Silent Spell and, if you insist on armor, Still Spell, too.