So a while back I saw the piper race in their list of racial traits they have the following
Mystic Voice (Su): Piper spellcasters have a natural magic in their voice and must use it as an element of all their spellcasting. The additional magic imbued in their voice means a spellcasting piper never has to worry about somatic components, and ignores the somatic component of any spell. However, pipers cannot cast spells without singing out verbal components. Even spells that normally do not have verbal components gain them when cast by a piper, and pipers cannot use the Silent Spell feat. Further, a piper cannot cast such spells quietly. It is not possible for a piper to make a Stealth check when casting.
I was wondering if there was a race or monster that can do that but with verbal components. We have the obvious silent spell metamagic but I'm looking for something innate. My DM approves 3PP as well as Paizo products. Homebrew is on a case by case basis, and I don't want to bother him over something that won't come up right away since I don't plan to use this character immediately unless I really have to. I can use characters that are half-monster allowing them to access 1 or 2 of their monster parent's abilities as long as I'm not doing something like claiming they inherited the power of Cthulhu or something. Let's say CR 4 max to give a hard limit, probably a bit low but better safe than sorry.
So my question is are there any monsters (max CR 4) or races (including 3pp) that can cast spells without verbal components.