Here's a Jazz/Rock track that has opportunities for backing as well as a melodic lead. It's harmonically moderately complex, but has a definite logic to it. It centers around Concert C Major and G minor, but wanders around a bit. Tenor and soprano play in E Major and A minor, while baritone, alto and sopranino play in B Major and E minor. The first track has a sopranino in the lead. The second track is your challenge.
This track is embedded with the friendly permission by the creatives on wikiloops.comView: https://www.wikiloops.com/backingtrack-jam-188792.php
This track is embedded with the friendly permission by the creatives on wikiloops.comView: https://www.wikiloops.com/backingtrack-jam-157918.php