I'm using a TAS5755M in an application. I have it mostly working as required (2.1, BD mode, biquads used as active crossovers and bass/treble shelf filters). I'm trying to get DRC working but am finding a dearth of documentation and some of what's there seems incorrect. I'm not a filter expert so I may be missing something. Is there an application note on how the DRC works? I see references to sloa148.pdf in other posts but the links in the forum are bad and I've been unable to find that document anywhere.
I don't want the numbers that are dumped out the of the GDE, I want to be able to calculate them. For example, the GDE can calculate alpha for energy, attack, or decay from milliseconds but I don't see the equation anywhere for me to do it in my software. Additionally, all of the units are unclear.
The data sheet (TAS5755M SLOS982C –AUGUST 2017–REVISED APRIL 2018) references "TAS570X GDE Software Setup development tool documentation (SLOC124)" in section 9.3.7 but that tool doesn't list TAS5755M in its configuration and it doesn't come with any documentation beyond the built-in help which is more about how to use the tool than how the part works.
The data sheet allocates only a single page to DRC, page 33, section 9.3.11. The graph shows T but not K or O and the register addresses in the chart appear to be incorrect. So, overall, that section is not particularly helpful.
I appreciate any guidance you can offer.
-Andrew