My own attempt at completing homework exercises from BAA GNU Radio Group Meeting 29/11/2025: Create an electronic keyboard which plays multiple music chords, and create an AM radio player

My GNU Radio Companion GRC file that plays multiple music chords:

https://www.astronomy.me.uk/wp-content/uploads/2025/12/BAA-GNU-Radio-Meeting-Exercise-Chord-Selector-201225_GRC.zip

Video showing the above GRC in action:

My AM radio player (users can select from recorded IQ file or play music through an RTL-SDR dongle):

https://www.astronomy.me.uk/wp-content/uploads/2025/12/BAA-GNU-Radio-Meeting-Exercise-AM-Radio-201225.zip