Weeks 9-10 · vibrato control
Choose between a steady straight tone and a controlled vibrato.
Why this matters: choosing intentionally between a straight tone (chorale, early music, modern pop) and a natural vibrato (legato classical, most ensembles) is a late-stage skill. Both should sit under conscious control.
10 trials on A3. Each: sustain the pitch for 4 seconds.
Pass = 4 of 5 clean for both modes (straight: extent ≤ 15¢; vibrato: 5–7 Hz at 30–80¢).
Pass = 4 of 5 clean for both modes (straight: extent ≤ 15¢; vibrato: 5–7 Hz at 30–80¢).