It is worth pointing out that this is a near-worst-case scenario and it is quite possible that a real musical signal would render errors at this level inaudible, however that would necessarily be programme-dependent. I successively lowered the level of the rogue sample by 6dB (roughly equivalent to one bit's worth of amplitude) at a time to -12dB, -18db, -24dB, -30dB, however it was still clearly if faintly audible even at -36dB. Next I experimented with reducing the amplitude of the click to see at what point it would become inaudible. Too easy! Even at one second the resulting click was very clearly audible. My plan was to see how far into the track I could play before these data errors became audible. I changed one sample one second into the track, two consecutive samples two seconds in etc. Then using the 'Draw' tool I edited the waveform at one second intervals to introduce -6dB 'spikes' into both L and R channels. I took track 17 from Stereophile Editor's Choice: Sampler & Test CD (a 1kHz tone at -20dB) and imported it into Audactiy. ![]() Elk asked this very question in another thread so I decided to take a closer look. ![]() However, given that on an audio CD each 16-bit word (some simplification here) encodes one sample representing only 1/44100th of a second of audio it is legitimate to ask whether these errors are generally audible at all. This is particularly relevant when ripping CDs, since a data error that makes its way into the ripped file will remain there forever. As computer audiophiles we love to obsess about 'bit perfectness' ('bit perfection'?), in other words whether or not the integrity of the audio samples being properly preserved in the digital domain.
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