Lost Soul is a virtual instrument capturing the distinctive sound of the Chinese Dongxiao, a vertically-played bamboo wind instrument known for its deep, grave tones traditionally used in ritual and classical music. This instrument excels in slow, smooth melodies but is also capable of conveying intense emotions through expressive airflow attacks and vibrato. Featuring 1868 high-quality samples recorded at 44.1 kHz and 24-bit resolution, Lost Soul offers an authentic representation of the Xiao's rich tonal character and performance nuances.

The instrument's sound environment is highly customizable thanks to multi-microphone recordings that capture spatial and reverb characteristics, mixed into four adjustable channels to shape the tone and ambiance. Lost Soul supports a wide range of Xiao playing techniques such as attack variations, mordents, trills, flutter, staccato, glissando, and diverse legato styles including traditional and wuxia-inspired legato. Its self-developed vibrato engine and spectrum fusion technology provide smooth, realistic transitions and expressive control, enabling detailed and dynamic performances.

Beyond authentic sound, Lost Soul includes a convolution reverb featuring acoustics from iconic Chinese heritage sites, enhancing the immersive experience. The instrument comes equipped with an effect rack including compressor, EQ, chorus, and delay for further sound shaping. Additionally, a comprehensive pattern library offers ready-to-use phrases and the flexibility to create custom patterns, making Lost Soul an inspiring tool for composers seeking the evocative tones of the Xiao in their music.