The broadcast of the concert at the Schubertiade Schwarzenberg on June, 23 at the Österreichischer Rundfunk, program Ö1, took place on July 10 at 19:30. It can be found on the following web site until July 17:
The Program includes Schubert’s string quartet in A minor D 804 „Rosamunde“ und his octet in F major, D 803.
The quartet’s partners are Laura Ruiz Ferreres, clarinet, Sibylle Mahni, french horn, Bence Bogányi, bassoon and Nabil Shehata, double bass.

The german program BR Klassik broadcasts the „Rosamunde“ quartet on Friday, July 27, 2018 at 18:05.
The web link is:

Deutschlandfunk Kultur broadcasts the concert of the HAMBACHERMusikFEST, that took place on June 1, 2018 on Tuesday, July 17, 2018 at 20:03 .
The program includes octets by Svendsen, Shostakovich and Glière, that the Mandelring Quartets performed together with the Minetti Quartet.
Further information and the live stream are to be found here:

Oktett bei der Schubertiade