In my mission to help people improve their intonation, I’ve had to come up with exercises that people can do in their own practice. Once I’ve convinced players that notes need to be adjusted according to their context in the music, regardless of what any tuner’s meter says, it helps to have exercises to back it up.
The attached handout is part of a set of exercises that you play against a drone, the tonic note of each exercise. In this case, all exercises are in C Major, so set your drone, tone generator, or helpful friend to play the middle C. As you play each exercise, you pause to listen to how your note compares against the drone; e.g. is it sharp, flat, or in tune with the drone? Don’t move on to the next note, until you get your note in tune!
The exercises start out by working on matching the unisons and octaves in the context of ascending and descending scales and arpeggios. Then they progress to tuning more of the notes in relation to the drone. The arrows indicate which direction the pitches need to be adjusted in relation to the drone pitch, assuming that you are playing them perfectly in equal temperament, i.e. in tune with a tuner meter. You may not need to make any adjustments, but let your ears be the judge.
So, give it a try! Then play it in all Major keys. Minor keys will require different adjustments, but after practicing the major keys for a few weeks, doing this in minor will be easy.
Reminder: we don’t hear in equal temperament. In order for our ears to register different harmonies as being “in tune”, we have to play the harmony note either higher or lower than a tuner would tell us to. (If this is new information to you and you need more proof than my say-so, there are many sources you can look up on the Web or in the library.)