I play live with the SX 900 and thought I’d use the VH harmony a lot. However, I found it takes some work to adjust the appropriate harmony for a given song, getting the balance right, the reverb, delay, etc… Those features can vary depending on the harmony patch selected. It takes a lot of work, but here’s what I do instead, which may be out of the mainstream for arranger players. I record the song’s rhythm track into a DAW, then add overdubs and vocal harmonies that I sing. Then, I play/sing live with all backing tracks mixed to Wav files. That frees-up the hands and allows more freedom in playing and performing.