-- Define the startup sound sequence with varied volumes and pitches
local soundSequence = {
    {instrument = "harp", volume = 1, pitch = 0.5},  -- Low pitch
    {instrument = "harp", volume = 1, pitch = 0.6},  -- Slightly higher pitch
    {instrument = "harp", volume = 1, pitch = 0.7},  -- Mid pitch
    {instrument = "harp", volume = 1, pitch = 0.8},  -- Higher pitch
    {instrument = "harp", volume = 1, pitch = 1},    -- Standard pitch
    {instrument = "harp", volume = 0.8, pitch = 0.8},-- Lower volume, higher pitch
    {instrument = "harp", volume = 0.8, pitch = 0.6},-- Lower volume, mid pitch
    {instrument = "harp", volume = 0.8, pitch = 0.4} -- Lower volume, lower pitch
}

-- Function to play a note with given volume and pitch
local function playNoteWithParams(instrument, volume, pitch, duration)
    local speaker = peripheral.find("speaker")
    if not speaker then
        print("No speaker found!")
        return false
    end

    -- Play the note with specified parameters
    speaker.playNote(instrument, volume, pitch)
    sleep(duration)
    return true
end

-- Check if a speaker is attached
local function checkSpeaker()
    local speaker = peripheral.find("speaker")
    if speaker then
        print("Speaker found!")
        return true
    else
        print("No speaker found!")
        return false
    end
end

-- Main program
print("Checking for speaker...")
if checkSpeaker() then
    print("Playing startup sound...")
    for i, sound in ipairs(soundSequence) do
        local duration = 0.4 -- Duration of each note
        if not playNoteWithParams(sound.instrument, sound.volume, sound.pitch, duration) then
            print("Failed to play note. Exiting.")
            return
        end
    end
    print("Sound playback completed.")
else
    print("Please connect a speaker and try again.")
end