Home alternatives to the organ in lockdown -keyboard player Terence Charlston with a spinet.  Terence has just released a CD of Frescobaldi on clavichord This week's Learning during Lockdown introduces new films on iRCO, which, coupled with recordings of recent webinars, form an introduction to practical harmony for the beginner, and a course in keyboard harmony and the structure of Bach chorales for RCO examination students.  During lockdown many organists have been taking to keyboard instruments other than the organ: we explore the results, and the music they've chosen to play.  There's also an offer of…