Here's my take on a the two audio related words used as adjectives.
Liquid: A sound that is as natural and true to the original source as the sound of water flowing over rocks in a stream. There is a three dimensional aspect to the complete combination of sounds that is captivating, mesmerizing, unpredictable, and soothing all at the same time. It touches your soul. Liquid is the essence of a sigh, a release of tension, a submission to the performance that goes beyond simply hearing sound. Liquid is immersion of one's consciousness into the event.
Organic: A sound or combination of sounds that accurately recreate multi-frequency tones of instruments that vibrate their bodies in harmony with their strings, instruments such as double bass, acoustic guitar, violin, piano, and many other instruments offering multi-frequency tone combinations with each note. When reproduced sound approaches the reality of these instrument I sense its texture and depth to be organic, a living thing. Human voices also have these multi-frequency tone combinations that emanate from the vocal chords, breath, chest resonance, and vibrato. Again, when it is delivered by a sound system such that it becomes wholly realistic and believable it strikes me as organic, in other words, true to life timbre, dynamics, resonance, and sustain.