As the title suggests, I'm looking to either download, or create, a 24 bit audio file, that only has data in the lower 8 bits. The point of this would be to determine, definitively, if a piece of audio equipment, portable player, sound card, etc. is actually putting out 24 bits, or simply cutting the last 8 bits out.
I would think (open to suggestions) best case would be something somewhere around 200-500Hz, I'm not sure what form would be best, but knowing that it would be a very small amplitude, and would require a lot of amplification to even hear, I'd like it to be directed at, and playable by woofers, just for the fact that they can handle more shock.
I usually deal with analog, and most I usually do with digital has been to make sure it approaches or barely hits 0db at the loudest of everything. My guess is that recorded as loud as will fit in the last 8 bits, in the right form (triangle??) should give me something audible with high enough amplification, and universally verify 24 bit capability for any device the test file is heard through.
I'm definitely thinking pcm inside of wav. I know I need to stay in the bottom 1/256 of the amplitude range, but I don't know the algorithm. Can anyone tell me, if I use a test tone generator program, to get as high as I can while staying within the bottom 8 bits, is it possible just by setting the output very low to a 24bit file?
The free program I have goes from 0 to -100 dBFS Say by setting it to -99dB? -99.7dB? 99.97dB? It seems that with this program, I can set the output to the 1/100 of a dB. Can anyone tell me what decibel levels relate to which bits? Specifically what level would keep it in the bottom 8 bits?