Matt Mitchell: Oblong Aplomb (Out Of Your Head Records OOYH 019. Album review by Tony Dudley-Evans) Oblong Aplomb is a double album on the innovative, Brooklyn and Richmond, Virginia-based Out Of Your Head Records; it has 24 relatively short tracks featuring pianist Matt Mitchell playing on 12 tracks each with drummer Kate Gentile and drummer/percussionist Ches Smith. Mitchell seems to be…