1. **Understand the basic principle of the portamento function of electric wind instruments * - The portamento effect of electric wind instruments is achieved by changing the pitch of the notes. There are corresponding electronic devices and software algorithms inside, which can produce smooth transitions between two or more notes according to the player's operation. This change simulates the effect of traditional instruments such as string instruments (such as erhu) and wind instruments (such as saxophone) when playing portamento.
2. **Achieve portamento by key operation** - **Touch-sensitive keys**: Some electric wind instruments are equipped with touch-sensitive keys to achieve portamento. For example, when a finger slides lightly on the key, the sensor of the electric wind instrument will detect the finger's movement and adjust the pitch according to the direction and distance of the slide. If you slide your finger from a lower-pitched key to a higher-pitched key, a portamento effect with rising pitch will be produced; vice versa, a portamento effect with falling pitch will be produced. - **Pitch bend wheel/joystick operation**: Many electric wind instruments have a pitch bend wheel or joystick to control portamento. During the performance, you can change the pitch of the note being played by gently pushing the pitch bend wheel or joystick with your finger or thumb. The greater the pitch bend wheel or rocker is pushed, the greater the pitch change is; the faster the speed is pushed, the faster the pitch changes. For example, when playing a melody from C to E, first play the C note, then slowly push the pitch bend wheel to gradually increase the pitch to E, and the portamento effect is achieved.
3. **Use function settings to adjust portamento parameters** - **Portamento speed adjustment**: Most electric blowpipes can adjust the portamento speed in the settings menu. This determines how fast the pitch transitions from one note to another. If you want the portamento effect to be smoother and slower, you can set the portamento speed to a slower speed; if you want a fast, jumpy portamento effect, you can set the portamento speed to a faster speed. - **Portamento range setting**: You can also set the portamento range, that is, the maximum range of pitch change. For example, if the portamento range is set to one octave, then when playing, the pitch can change within an octave through the portamento operation. Such settings can be flexibly adjusted according to the repertoire and style of the performance. For example, when playing classical music, a smaller glissando range may be needed to maintain the elegant style of the music; while when playing some music with folk or jazz styles, a larger glissando range can increase the expressiveness of the music.
4. **Enhance the glissando effect by combining breath control** - While using the keys or pitch bending device of the electric blowpipe to perform glissando operations, combining breath control can make the glissando effect more natural. For example, in the process of glissando with rising pitch, appropriately increasing the breath can make the pitch rise fuller and rounder; in the process of glissando with falling pitch, gradually reducing the breath can make the pitch drop softer. Just like when playing saxophone-style glissando, the support of breath can make the glissando sound more like the performance of traditional saxophone, enhancing the appeal of the music.