Conrad Ansorge's string quartets in A-flat, Op.13 (1900) and in A major, Op.20 (1901-4) will be available on a new cpo CD around the end of the month, together with his cello sonata in D minor Op.24 (1908). See eg JPC (https://www.jpc.de/jpcng/cpo/detail/-/art/conrad-ansorge-streichquartette-nr-1-2/hnum/8977572) (which includes a link to their booklet.)