I think he's kind of wrong. As you say, anything going through any kind of professional audio editing software is probably 32/64 bit float. AFAIK all audio plug

I think he's kind of wrong. As you say, anything going through any kind of professional audio editing software is probably 32/64 bit float. AFAIK all audio plugin standards work on 32/64 bit floats. Although I imagine at least historically that's more because 32 bit floats are a native data type.