[wdmaudiodev] Re: Loop back AGC in renderer audio path?

  • From: "Matthew van Eerde" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "Matthew.van.Eerde" for DMARC)
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Thu, 21 Feb 2019 22:13:31 +0000

Windows does not do such a thing as you describe; what gave you that impression?

________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> on 
behalf of Jacob Martin Riiser (JMRI) <jmri@xxxxxxxxxxx>
Sent: Tuesday, February 19, 2019 7:51:35 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Loop back AGC in renderer audio path?

Hi,

While developing an SFX APO (renderer), I have encountered some problems 
causing my output to exceed legal range – this is being addressed.
However, while looking into this, I got the impression that Windows (I presume) 
monitors the output level of the APO, and is able to apply AGC-like 
functionality by adjusting the input gain to the APO.

I would really like some info on this functionality, including:

  *   How does this work?
  *   Are time constants described somewhere?
  *   Can it be tuned or adjusted in any way?

Best regards / Med venlig hilsen

Jacob Riiser (JMRI)
DSP Engineer

Sennheiser Communications A/S
Industriparken 27
2750 Ballerup
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