You can use your instrument to play various notes or melodies based on the modes of each chord to help ingrain the sound of the key center. Usually very simple melodies are the best.
Play a MetroDrone on another device. (Although there is a track with a drone included in the course.) Having a pitch played from another source can sometimes help a lot. You can also try playing the root in different octaves. Many students hear higher notes in a key center better than low notes.
Singing the notes of each chord or creating guide tone melodies can also help to establish a key center. Guide tones should be again based on the mode for each chord. If you are new to guide tones see the Guide Tones Course.
Slash Chord Ear Training Practice Strategy Conclusion
Practice Perfect Applied Slash Chord Ear Training Volume Three is the final book in the Slash Chord Series covering the three main uses of tertially based Slash Chords. You can hear examples for the course on this webpage. The type of playing used in these examples is common to contemporary guitarists and pianists, so it is important to at least master key retention for these tracks in order to understand and improvise within those situations.
Bruce Arnold Music Education Genealogy Chart
You might enjoy checking out the “Music Education Genealogy Chart” located on my artist’s site. You will clearly see the historic progression of pedagogy that is the basis for Muse Eek Publishing Products. Great musicians throughout history have been studying the ideas presented by Muse-eek.com which derives its content from a a lineage that stretches back to Scarlatti!