Room correction with convolution per sample rate

[Alandbush]

(29-11-2018 07:52)digimuse Wrote:  Test 3: apply 44.1 kHz convolution filter
source: 16/44.1 kHz
stream.options: convOut=-i /mnt/disk1/share/MinimServer/convolution/Cor1S44.wav -lavfi afir
stream.transcode: <blank>
SPL: 80 dB

The convolution filter should have reduced the SPL to around 75 dB, yet it is unchanged at 80 dB?

Is the convolution a no-op? Or does ffmpeg "normalize" the output for "-lavfi afir" convolution?

I hesitate slightly in replying because Simon has already replied but not commented on Test3.

However, I would have thought the answer to Test3 is to be found in the Streaming options wording, extraction below.

“convOut A string containing additional output options to be passed to the stream converter program when performing transcoding.”