  This paper proposes a system for chord generation to monophonic symbolic
melodies using an LSTM-based model trained on chroma histogram representations
of chords. Chroma representations promise more harmonically rich generation
than chord label-based approaches, whilst maintaining a small number of
dimensions in the dataset. This system is shown to be suitable for limited
real-time use. While it does not meet the state-of-the-art for coherent
long-term generation, it does show diatonic generation with cadential chord
relationships. The need for further study into chroma histograms as an
extracted feature in chord generation tasks is highlighted.
