Track 13: Immediately recognized Joe Farrell on soprano. Reminded me of Moon Germs a little. Then googled Farrell plus marimba and found it.
Horacee Arnold: Tribe. Billy Harper is a bit overbearing for me but to each their own. Nice record - good writing. The next track has Mraz and David Friedman playing a mean unison line.
Track 10: Very curious to know what this is. Nice orchestration - Piccolo, Clarinet, Flute, The flugelhorn lead sounds like a french horn section.
I bet this is Rod Levitt. I have an LP, Insight (RCA) which this track is not on, so maybe it's from Solid Ground or 42nd Street.