If a Levite cannot sing because his voice is not pleasant, may he still receive tithes even though he did not perform the service?

This source-based Torah study examines the question: If a Levite cannot sing because his voice is not pleasant, may he still receive tithes even though he did not perform the service? The canonical Hebrew discussion develops the issue through the weekly Torah portion and the sources cited there, preserving the distinctions, tensions, and practical implications of the original text. This localized discovery layer does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.