CREATE TABLE table_73541 ("Horizontal order" FLOAT, "Height order" FLOAT, "Soundfield type" TEXT, "Number of channels" FLOAT, "Channels" TEXT)

If the channels is wxyzuv, what is the number of channels?
SELECT "Number of channels" FROM table_73541 WHERE "Channels" = 'WXYZUV'
SELECT "Number of channels" FROM "table_73541" WHERE "Channels" = 'WXYZUV'