這個不用電就可以做出 chorus 和 reverb 效果的木吉他挺有意思的！從電腦 speakers 聽 chorus 效果似乎不是那麼明顯，但 reverb 共鳴倒是有。技術上的解釋沒有很清楚...... In essence, TransAcoustic guitar technology allows the player to add both reverb and chorus to the natural sound of the instrument – emanating from the guitar itself, without having to plug in external effects or amplification. It accomplishes this feat through the incorporation of an actuator inside the guitar. When the player performs, the strings cause the actuator to vibrate, which is then conveyed to the guitar body and to the air around the guitar, resulting is stunningly authentic reverb and chorus effects. Three knobs located on the side of the guitar provide easy adjustment of the level of the effect, as well as a line out volume level and an on/off control. The two models are available in Vintage Tint and Brown Sunburst finishes, with clear pick guards and ebony fingerboards. They each feature a solid Engelmann spruce top that has been aged with Yamaha A.R.E. technology, as well as rosewood backs and sides, which translates into a warm, yet powerful vintage quality tone. Five-ply mahogany and rosewood necks are climate resistant, and they intonate and stay intonated over time. The edge of the neck and the frets are rounded, making it smooth all the way across the instrument, so there is no worry about fingers getting caught, particularly appealing to guitarists who like to play with their thumb. An SRT piezo pickup provides the guitar's plugged-in tones. In addition, a redesigned battery box is integrated with the guitar's endpin, reducing acoustic sound loss. “Whether practicing, writing, recording or just playing for fun, the Yamaha TransAcoustic Guitar will make you play better, longer and with more creativity,” said Dennis Webster, marketing manager, guitars, Yamaha Corporation of America. “Adding these effects to the natural sound of the instrument is far more enjoyable than in a dry-sounding room. Once you’ve experienced it, you’ll never want to play another acoustic guitar again.”