Yes.
If they're turned up, yes.
Some examples of loud instruments commonly used in rock bands are electric guitars, drums, and bass guitars.
Yes, brass instruments are loud
Loud instruments are the brass horns and electric guitars... soft is harmonica and klimba and glockenspeil.
drums
Loud sounds instruments
Drums and some older instruments are very loud without amplification, before amplifiers they would use several violins (or people singing) so they could be herd when the drums and louder instruments were playing. Guitars and Pianos/Keyboards are not as loud and the only way they can be heard with the drums, horns and other things is to amplify them or have several of the same instrument playing the same thing at once.
A piano can be louder than some instruments like the flute or violin, but not as loud as others like the trumpet or drums.
No. Lego Rock Band Does not come with Instruments.
Rock instruments played in a non-rock style. Or instruments from classical and electronic music. Or not. Is a very experimental music, it can be all or nothing.
I think you are asking "What are some musical instruments that can be played loudly?" Many electronic and electrified instruments can be played very loudly because they are amplified by electronic amplifiers and have electronic speakers. An electric guitar can be very loud. Some rare "folk" instruments that are not in common use today are very loud because they were meant to be played outdoors. The alpenhorn is an example of this. The bugle is a brass instrument that can be played loudly; that is why bugles are used in the military to give bugle calls for assembling all the soldiers on an army base. Among instruments that can be played in an orchestra or band, many of the brass instruments in the wind family can be quite loud. The trumpet is quite loud in a high pitch range, and the tuba is quite loud in a low pitch range. Percussion instruments such as the bass drum and the gong are very loud. Bagpipes are loud, particularly the large Highland bagpipes of Scotland.
They are extremely loud, for the most part.
No unfortunately the instruments for rockbands are platform specific.