Allow descriptive (spoken) sounds for Stamps, along
with sound effects (noises). For example,
"rooster.png" would still have "rooster.ogg" (sound
of a rooster crowing), but also
"rooster_desc.ogg" (the word "Rooster" spoken in
English), and locale-specific translations (e.g.,
"rooster_desc_ca.ogg" for spoken Catalan).