6/12/2023 0 Comments Vorbis opus mp3 comparisonNext I encoded the files to various lossy and lossless codecs and looked at the size difference between the padded and unpadded files to gauge how efficiently the silence was encoded.Īls: MPEG-4 Audio Lossless Coding v23 (mp4alsRM23 -a -b -o50)įlac: Free Lossless Audio Codec v1.3.1 (flac -8) The second file was the same, except padded with 210 minutes of silence, making the total duration 240 minutes (or 4 hours). The first was a 44.1kHz 16bit 30 minutes long stereo WAVE file containing uncorrelated brown noise at -10.66 dBFS RMS. Having said that, I was a little curious about this myself so I had a go at comparing how well the different codecs fared at compressing pure digital silence. After all, any bit of silence is identical to any other bit of silence, trying to compress it is a bit of waste of effort. ![]() Of course, dealing with it programmatically would be the more sensible and SO way, something like SoX and the silence/pad effects.
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