No links in this opening post,
and hopefully future posts to this thread will have links
to recordings/performances of this music.

An existing thread name-checked the Rachmaninoff Vocalise,
one of that composer's more popular works
and often played with an instrument and accompaniment,
rather than a wordless voice, as the composer intended.

The equally well-known Villa-Lobos work, short as it is,
is a little more complicated. It is
No. 5 from his Bachianas Brasileiras.
The piece begins, and ends, with the wordless vocalise.
There is a middle section, however,
with melody AND words for the soprano voice.

Anybody know of vocalise pieces by other composers?