AGC disabled firmware

--------------- Success! ---------------

As an early goal, I have disabled the AGC for on the AK4646 audio chip that the 5D uses by overriding the sound_dev_task() at 0xFF856E60 to call audio_set_alc_off() at 0xFF856B14. The level is much too hot due to the wrong levels selected (it defaults to max gain?) but there is no shift in quiet scenes anymore. This is an easy first step that provides a proof-of-concept modification for the 1.0.7 firmware.

I can also log the audio levels as they are being sampled, which will make it possible to do on-screen level meters at some point in the future. My next step is figuring out how to add menus for the AGC disabling, then tackling the MVR_start_record() and LVAE_* functions.

<rant=on>
Canon, we are tired of waiting for you to act. So, without you, we will first fix the obvious problems, then we'll make it better. We'll probably help you sell more cameras, too.
</rant>

you are the man! thanks so much for your effort.

So, without you we will first fix the obvious problems, then we'll make it better. We'll probably help you sell more cameras, too.

YES!!!!!!!!

Wonderful!

that is all.

Did you ever know that you're my hero?

And everything I would like to be

I could fly higher than an eagle

But you are the wind beneath my wings

Hudson,

It's difficult to express how grateful we are for your time and effort. Congratulations on your achievement.

Hi, hudson,

I've been lurking here for a while, but really felt the need to say thanks for the efforts you are putting into this.
Good job!

Hi Hudson, great work and a huge thanks in advance! G

I second the motion.

Congratulations and Thanks, you're making history -- you beat Vincent Laforet!

E. : -)