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These 2 WAV files (Windows PCM and normal formats) are the Apple Pippin Boot Sound that you can use in older versions of Basilisk II or SheepShaver.
Apple_Pippin_Boot_Sound.zip (204.36 KiB / 209.26 KB)
WAV sound files
120 / 2014-10-16 / 2016-08-10 / c5932f9bf0d0861f596a0bb2247a388912070974
Emulating this? It should run fine under: SheepShaver