Use your abdominal muscles to support your voice when you begin to sing. Stand or sit up straight and tighten your abdominal muscles slightly as you begin to produce a vocal tone.
Tilt your chin downward as you begin to sing, and relax the muscles in your jaw, face and neck. If your muscles are tense, your voice won't have a rich, raspy quality.
Exhale with a breathy sound as you sing. This breathy vocal quality is part of the main essence of raspy singing.
Sing with a lower vocal tone. Raspy singing usually has a deeper tone.
Sing a lyric, and then speak the same lyric. Try to perform a vocal that is somewhere between singing and speaking to help make the raspy sound.