elskardio
Well-known member
Hi guys,
I'm working on a small channel strip with a built-in USB output.
I'm using the PCM2906C for the codec and after a few revisions and tweaks, I'm pretty happy with the result.
The noise floor sits at -79dBFS in DAWs.
But there's one thing I would like to improve... if it's possible. I know this 16bit chip has its limitations.
When I look at the noise floor with a frequency analyzer (please see the attached picture), there's clearly a high shelf peaking at 18.5KHz.
The codec is powered with an external regulator and I'm using more than enough coupling capacitors.
What could cause this high shelf?
Any hint would be appreciated.
Cheers
I'm working on a small channel strip with a built-in USB output.
I'm using the PCM2906C for the codec and after a few revisions and tweaks, I'm pretty happy with the result.
The noise floor sits at -79dBFS in DAWs.
But there's one thing I would like to improve... if it's possible. I know this 16bit chip has its limitations.
When I look at the noise floor with a frequency analyzer (please see the attached picture), there's clearly a high shelf peaking at 18.5KHz.
The codec is powered with an external regulator and I'm using more than enough coupling capacitors.
What could cause this high shelf?
Any hint would be appreciated.
Cheers