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function M.dispose(fileName_)
-- Solar2D API: audio.dispose( audioHandle )
	
-- Note: Destroying the audio will also stop the audio.
-- !Unlike the audio API, it is possible to destroy (without errors) an audio while it's already playing.
	
	-- Destroy audio if it exists.
	if cache[fileName_] then cache[fileName_].wavObj:destroy() end
	
	-- All channels that were playing the audio will be clear.
	-- clearAllChannels(filename_)
        clearAllChannels(fileName_)
	
	-- Clear cache.
	cache[fileName_] = nil
end

function M.findFreeChannel(startChannel_)
	-- Solar2D API: audio.findFreeChannel( [ startChannel ] )
	-- Search will increase upwards from this channel. 0 or no parameter begins searching at the lowest possible value.
	-- The search does not include reserved channels.

	-- Returns 0 if no available channel found, else it returns next available channel.
	-- return getNextAvailableChannel(startChannel_ or 0) or 0
	return getNextAvailableChannel(startChannel_ or 1) or 0
end

local speed = 0.5
local source = audio.getSourceFromChannel(channel)
al.Source(source, al.PITCH, speed)