Example:

Snegourotchka 291-300 (cf. extract, [Ex. 118]) Sopr. and Bar.

The use of similar voices in pairs:

Sopr.,Ten.
Sopr.,Ten.

entails singing in unison and thirds. They should rarely be separated beyond a sixth, but crossing of parts is inevitable, as otherwise the resultant volume of tone would be too weak.

Note. Other possible combinations:

C.-alto,
Bar.,
M.-sopr.,
Ten.,

call for no special remarks.

Examples:

* The May Night, Act I pp. 59-64—Mezzo-sopr. and Tenor.