1. Vocal Technique: Strong vocal technique is the foundation of any great voice. It includes developing control, range, and agility in the singer's vocal range, as well as mastery over breath support, resonance, and vocal projection.
2. Intonation and Pitch Control: The ability to sing accurately, with good intonation and pitch control, is essential for creating a pleasant and technically sound performance.
3. Tone Quality and Timbre: A unique and pleasing tone quality, often described as "voice color" or "timbre," can set a great voice apart from others. It involves resonance and the balance of different vocal formants.
4. Diction and Clarity: Clear and precise diction allows the audience to understand the lyrics, adding depth and meaning to the performance.
5. Emotional Connection and Interpretation: A great singing voice can evoke emotions and communicate the message or story of a song effectively, creating a strong emotional connection with the listener.
6. Range and Flexibility: A wider vocal range and the ability to effortlessly switch between low and high notes adds depth to the voice.
7. Vocal Dynamics and Control: Varying the volume and intensity of the voice, from soft and delicate to powerful and projected, can add drama, nuance, and expressivity to the performance.
8. Consistency and Control Over Extended Performances: Maintaining a consistent vocal quality, even during challenging sections, showcases a singer's control and stamina.
9. Stage Presence and Connection: A captivating stage presence and the ability to connect with the audience add an extra dimension to the performance, making it memorable.
10. Uniqueness and Personal Style: A singer who can blend all of the above factors and add their unique personality and style can stand out and become truly exceptional.
It's important to note that there is no single standard of vocal perfection, and tastes and preferences for singing voices can vary greatly. Nevertheless, these qualities are often found in accomplished singers who consistently captivate and impress their audiences.