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File:Complete school of technic for the pianoforte - including flexibility and independence, scales in all forms, extension, arpeggios in all forms, double notes, octaves and chords, trills, tremolo, (14746047416).jpg - Wikimedia Commons
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Help: trills in 3rd movement of Brahms op. 38 (piano/cello) - Piano World Piano & Digital Piano Forums
![Technical exercises. Book 8. Broken octaves. Alternating between the hands of the octave. Chord exercises. Trills of thirds, quarts, sexs, octaves | ISBN 9785811433612 | Buy online Technical exercises. Book 8. Broken octaves. Alternating between the hands of the octave. Chord exercises. Trills of thirds, quarts, sexs, octaves | ISBN 9785811433612 | Buy online](https://ruslania.com/pictures/musicsheets_photos/0/7611/9785811433612_d.jpg)