Today's edition of Midday on Music continues now with two great musician friends of Midday joining Tom in Studio A: They are Robin Bullock, who has appeared as a solo artist and as part of Helicon, and Sue Richards, who is a member of Ensemble Galilei. Both have played for us several times here in Studio A. Now, they have teamed up as a duo and recently released a terrific CD of traditional Celtic music called Highland Ramble. Robin plays guitar, mandolin and cittern, among other traditional string instruments. Sue is a four time National Scottish Harp Champion. We streamed their performance today on WYPR Facebook Page, and you can watch the video here, beginning at 36:00 into the feed.The duo plays two tunes from the Highland Ramble CD: ----Loftus Jones---- by Irish harper Turlough O'Carolan, and ----Farmors Brudpolska,---- a traditional 19th century Swedish wedding polska.Robin Bullock and Sue Richards are playing at 7:30pm tonight at the Church of the Redeemer in Baltimore, as part of the Common Ground on the Hill Concert Series.If you miss them tonight, they’ll be back in Baltimore on December 6th at Govans Presbyterian Church, and Robin will be playing a solo all-Bach concert at An Die Musik in Baltimore on November 1st.