Tuba Solo - Level 5 - Digital Download SKU: A0.723538 Composed by Steve Winstead. Concert,Contemporary. Individual part. 3 pages. Sigma Squared Music #2968891. Published by Sigma Squared Music (A0.723538). This unaccompanied tuba feature is robust and technically challenging. It showcases the instrument's wide range and expressive capabilities, and will be a fine selection for your next recital or contest.