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Diffstat (limited to '2022/organizers-notebook')
| -rw-r--r-- | 2022/organizers-notebook/index.org | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/2022/organizers-notebook/index.org b/2022/organizers-notebook/index.org index 1b431945..60303abd 100644 --- a/2022/organizers-notebook/index.org +++ b/2022/organizers-notebook/index.org @@ -1606,7 +1606,7 @@ We’ve simplified the process down to these steps: You might want to increase the size of the waveform by pulling on the bottom of the bottom of the track. -[[file:audacity-demo-resize.webm]] + [[https://media.emacsconf.org/misc/audacity-demo-noise-reduction.webm][audacity-demo-noise-reduction.webm]] 2. Find a moment of quiet in the video, and select it. @@ -1624,6 +1624,8 @@ We’ve simplified the process down to these steps: enough (Noise reduction (dB): 12, Sensitivity: 6.00, Frequency smoothing (bands): 3). + [[https://media.emacsconf.org/misc/audacity-demo-noise-reduction.webm][audacity-demo-noise-reduction.webm]] + 6. Tools → Apply Macro → Alpha Before you can apply the Alpha macro, you need to save its content to @@ -1637,19 +1639,21 @@ Normalize:ApplyGain="1" PeakLevel="-3" RemoveDcOffset="1" StereoIndependent="1" Compressor:AttackTime="0.1" NoiseFloor="-50" Normalize="1" Ratio="2" ReleaseTime="1" Threshold="-30" UsePeak="0" #+end_src -7. Save the file to disk with libopus (.opus format) +7. Export → Export Audio… → Opus Files (.opus format) + Use the following settings: -#+begin_quote -Bit Rate: 64 kbps -VBR Mode: On -Compression: 10 -Application: Audio -Frame Duration: 20 ms -Cutoff: Disabled -#+end_quote + [[https://media.emacsconf.org/misc/audacity-export-settings.png][audacity-export-settings.png]] + + #+begin_quote + Bit Rate: 64 kbps + VBR Mode: On + Compression: 10 + Application: Audio + Frame Duration: 20 ms + Cutoff: Disabled + #+end_quote -[[file:audacity-export-settings.png]] **** Model-based denoising filter If you can’t manage to get a good result with Audacity, chances are it’s @@ -1666,6 +1670,9 @@ this means a model that minimizes background noise and maximizes clear voices (the speakers’). This is the model we’ve been using: + +[[https://media.emacsconf.org/misc/audio-denoiser-model-mp.rnnn][audio-denoiser-model-mp.rnnn]] (download link) + Source: [[https://github.com/GregorR/rnnoise-models][rnnoise-models]], Model: [[https://raw.githubusercontent.com/GregorR/rnnoise-models/master/marathon-prescription-2018-08-29/mp.rnnn][marathon-prescription]] You should always apply the filter on the original’s audio, as opposed @@ -1680,7 +1687,7 @@ Make sure to modify the ~DENOISER~ variable and adapt input/output. DENOISER="/path/to/audio-denoiser-model-mp.rnnn" input="original.opus" output="denoised.opus" -ffmpeg -i "$input" -af "$DENOISER" "$output" +ffmpeg -i "$input" -af "arnndn=m=$DENOISER" "$output" #+end_src There’s no need to customize the libopus export information; the default |