Many of the entries from the Alto in Treatises page had not yet been included in the Alto Trombone Timeline, so those were added to the timeline. They include many primary sources relevant to alto trombone history, including those by…
Prout
Update to Alto in Treatises Page: Summary of Alto Trombone Keys
Made the following update to the Alto in Treatises page, giving a summary of specific keys that writers have historically assigned to the alto trombone. For more on alto trombone keys, see also the Extant Altos page, which lists alto…