exampleadsr

local component = require("component")
local sound = component.sound

-- Reset Sound Card to known state
sound.clear() -- clear out buffers
sound.setTotalVolume(1) -- set overall volume to max
for i = 1,8 do
    sound.resetEnvelope(i) -- remove any ADSRs
    sound.resetAM(i) -- remove any AM modulation
    sound.resetFM(i) -- remove any FM modulation
    sound.setVolume(i,1) -- set channel volume to max
    sound.close(i) -- close channels (stop emitting audio)
end

-- process commands
while not sound.process() do
    os.sleep(0.05)
end

-- next statements add commands to the buffer
sound.setWave(1, sound.modes.square) -- set channel 1 to square wave
sound.setFrequency(1, 500) -- set channel 1 to 500Hz
sound.setADSR(1, 100, 300, 0.5, 200) -- set channel 1 ADSR to Attack: 100ms, Decay: 300ms, Sustain: 50%, Release 200ms
sound.open(1) -- open channel 1 (hit note)
sound.delay(500) -- wait 500ms
sound.close(1) -- close channel 1 (release note)
sound.delay(200) -- wait 200ms (for ADSR Release)

-- process commands
while not sound.process() do
    os.sleep(0.05)
end