Here are some recordings of the C/G and G/D concertinas I make. There are recordings of cross row playing which is typical to Irish traditional music and recordings of harmonic playing with chords which is typical to English traditional music.
G/D Concertina recordings
This tune is in G major, played along the rows with heavy use of chords. The valiant was written by Simon Ritchie.
Music for a found harmonium by Penguin Café Orchestra. Quite the cross row tune.
C/G concertina recordings
Devil Among The Tailors. A traditional tune played in D across the rows.
The Quarry. A traditional tune mostly in C Major played along the rows and with chords.
Credit to John Timpany for helping me make these recordings happen.