Music.Theory.Instrument.Choir
data Voice
voice_abbrev
voice_clef
type Voice_Rng_Tbl
voice_rng_tbl_std
voice_rng_tbl_safe
lookup_err
voice_rng
voice_rng_std
voice_rng_safe
in_range_inclusive
in_voice_rng
possible_voices
possible_voices_std
possible_voices_safe
satb
satb_name
satb_abbrev
type Part
ch_satb_seq
ch_parts
part_nm
k_ch_groups
k_ch_groups'
dbl_ch_parts
mk_clef_seq