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manual audio recording on SX20, maybe can activate for other camera

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Offline Bernd R

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manual audio recording on SX20, maybe can activate for other camera
« on: 01 / August / 2011, 11:03:43 »
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I read here in german post, that the SX20 have a manual settable recording level.its only in german


http://forum.chdk-treff.de/viewtopic.php?f=10&t=1501&start=180#p21401

maybe somebody with good firmware knowledge and a Sx20 can find the prop register that control manual automatic record level and the gain value.

maybe other canon camera have this register too and when modify them with chdk, manual record level is possible.

manual recording level is a must have for good concert recording.

« Last Edit: 01 / August / 2011, 11:42:01 by Bernd R »
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Offline fudgey

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Re: manual audio recording on SX20, maybe can activate for other camera
« Reply #1 on: 01 / August / 2011, 14:54:04 »
While possible and worth investigating, keep in mind that Canon uses & has used a multitude of different audio chips. Some are capable of greater things than others, and disabling AGC/ALC will be one of the things that may not be possible on all hardware. But at least previously in the vxworks days firmwares had clear text strings hinting which audio chip the camera (probably) had.

So, one could start by checking which audio chip the sx20 fw refers to (if any) and search for that string on other firmwares to find suitable targets.
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