user: Question: If the height order is 1 and the soundfield type is mixed-order, what are all the channels?
Columns: ['Horizontal order', 'Height order', 'Soundfield type', 'Number of channels', 'Channels']
Types: ['real', 'real', 'text', 'real', 'text']
Sample row: [1.0, 0.0, 'horizontal', 3.0, 'WXY']
SQL:

assistant: SELECT "Channels" FROM "Table" WHERE "Soundfield type" = 'mixed-order' AND "Height order" = 1.0;