In Reply to: RE: Enough Computer Audio Mythology posted by SBGK on December 12, 2014 at 04:35:35:
There are good reasons why changing the control program might affect the sound quality. It might not be necessary for the control program to be running to affect the sound on playback. It might not be necessary for the control program to even be loaded in memory to have an effect. For example, two different control programs could result in the play program or the audio samples being loaded in different places in memory. Also, they could have left the CPU caches in different states.
If you want to have a fair shot at a valid experiment you would need to verify that both control programs left RAM memory in the exact same state, which means that the audio data has not only to be the same, it has to be stored in the same locations and every other memory location in the RAM has to be identical. In other words, the entire RAM has to be scrubbed except for the audio. At the least this will require verification that the audio data is loaded in the same locations and is unchanged. Scrubbing the rest of the RAM can probably be accomplished by rebooting the computer, if the audio data in RAM can be somehow protected. (I say "probably" because there still could be logic state that does not get reset at the time of a software reboot.)
Beware of the Turing tar-pit in which everything is possible but nothing of interest is easy.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: Enough Computer Audio Mythology - Tony Lauck 12/12/1413:51:01 12/12/14 (10)
- RE: Enough Computer Audio Mythology - Jaundiced Ear 22:32:37 12/12/14 (9)
- RE: Enough Computer Audio Mythology - Tony Lauck 09:19:52 12/13/14 (8)
- RE: Enough Computer Audio Mythology - SBGK 09:56:44 12/15/14 (5)
- RE: Enough Computer Audio Mythology - Tony Lauck 12:12:01 12/15/14 (4)
- RE: Enough Computer Audio Mythology - SBGK 12:25:38 12/15/14 (3)
- RE: Enough Computer Audio Mythology - Tony Lauck 13:06:45 12/15/14 (2)
- RE: Enough Computer Audio Mythology - SBGK 13:25:47 12/15/14 (1)
- RE: Enough Computer Audio Mythology - Tony Lauck 13:48:03 12/15/14 (0)
- RE: Enough Computer Audio Mythology - Mercman 13:12:32 12/13/14 (1)
- RE: Enough Computer Audio Mythology - Tony Lauck 18:57:43 12/13/14 (0)