Room correction with convolution per sample rate

[simoncn]

(30-11-2018 01:02)digimuse Wrote:  Alan, thanks for the correction. My introduction to convolution was the post (convolution with acourate fir filter). An error message would be helpful if stream.transcode is blank and stream.options has convOut ...

A forum post doesn't always include full instructions but might assume some prior context. This combination is not an error and it would not be appropriate to produce an error message.

Quote:Test 3-1: convert FLAC to WAV and 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: flac:wav;
SPL: 60 dB

Something wrong here with 20 dB volume reduction.

I have reproduced this problem by changing from FFmpeg 3.4.x to 4.1. My previous results were with 3.4.x. I don't yet know what has changed or why.