POLYPHONICALLY
polyphonically
(adverb) in a polyphonic manner; “polyphonically composed”
Source: WordNet® 3.1
Etymology
Adverb
polyphonically (not comparable)
In a polyphonic manner; using polyphony.
Source: Wiktionary
POLYPHONIC
Pol`y*phon"ic, a. Etym: [Gr. polyphone.]
1. Having a multiplicity of sounds.
2. Characterized by polyphony; as, Assyrian polyphonic characters.
3. (Mus.)
Definition: Consisting of several tone series, or melodic parts,
progressing simultaneously according to the laws of counterpoint;
contrapuntal; as, a polyphonic composition; -- opposed to homophonic,
or monodic.
Source: Webster’s Unabridged Dictionary 1913 Edition