There is no substitute for live music and we are missing it. For the past three months performance venues have fallen silent. Festivals we had hoped to attend later this year have been cancelled. Orchestras and opera companies are having to adjust to an unprecedented fall in income. To gain some insight into the current challenges I spoke earlier this week to Alexander Van Ingen, Chief Executive of the Academy of Ancient Music (AAM), the period instrument ensemble based in Cambridge but with a strong presence in London and beyond.