Many decades ago I played an Eb Bass, it was a good experience and I’d definitely play one again. With the Eb Bass being both pitched just a little below the Euphonium and not that much larger it seemed to retain flexibility in how it played whilst still covering the bass line and beat. Whilst near ‘mine’ was neither too heavy or too big to transport on foot and public transport – wish I still had it .... Eb Basses were the norm in the lowly Brass Bands I played in then but when I returned to brass playing, towards four decades later, things seemed to have changed. Now it seems to be normal for Basses in Brass Bands to be double (EEb or BBb) rather than single (Eb or Bb). It might be counter intuitive but as I understand it double refers to dimensions only (see: http://www.themouthpiece.com/vb/archive/index.php/t-43352.html), doubles and singles actually play at the same pitch but have different bores and bell sizes. I have two questions: # When and why did the change(s) happen? # Are there still roles for the single Bass and if so what?