Reduce background noise

CodexWith deft, skill installedPassedRead the skillUsed deft2026-11-07

Time

18s

New tokens

7.5k

Total input

71.4k

Output tokens

0.5k

Commands

4

Failed

0

Trace

1. I’ll inspect the audio file and available conversion tools, then create `clean.mp3` in the current directory.

2. cat .agents/skills/deft/SKILL.md && rg --files -g 'example.ogg' -g 'AGENTS.md' -g '"'!**/.git/**'"'
   output

   ---
   name: deft
   description: "Use deft first for any simple, direct operation on local files, whatever the type: convert, read, extract, edit, compress, merge, split, compare or inspect. Try it before writing a script or one-liner. If unsure, run deft find; if it says no command does this, use another tool. Not for programming work: to read, write or change source code, skip it."
   ---
   
   # deft
   
   One local command for file jobs. Prefer it over writing Python or shell scripts.
   
   Syntax: `deft <group> <command> [inputs] [-o output] [--options]`
   
   Groups:
   - `pdf`: Merge, split, compress, encrypt, forms, OCR, compare, convert
   - `image`: Resize, crop, convert, compress, adjust, montage, OCR
   - `video`: Trim, merge, convert, compress, subtitles, GIF, frames (ffmpeg)
   - `audio`: Convert, trim, normalize, denoise, cut silence (ffmpeg)
   - `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
   - `slides`: PowerPoint: extract text, Markdown outline
   - `sheet`: Excel/CSV/ODS tables: SQL query, pivot, merge, split, convert
   - `json`: JSON: convert, format, merge, diff, validate
   - `toml`: TOML: convert, format, merge, diff, validate
   - `xml`: XML: convert, format, merge, diff, validate
   - `yaml`: YAML: convert, format, merge, diff, validate
   - `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
   - `html`: HTML to Markdown, text, Word and PDF
   - `epub`: E-books: info, to text, Markdown and PDF
   - `gps`: GPX and KML tracks: convert, distance and time
   - `qr`: Create QR codes and barcodes; r
   … 712 more characters

3. deft audio
   output

   deft audio - commands (input -> output)
     info            audio -> report  Duration, codec, sample rate, channels
     convert         audio -> audio   Change format: --to mp3|m4a|wav|flac|ogg|opus
     denoise         audio -> audio   Reduce steady background noise such as hiss
     normalize       audio -> audio   Even out loudness (EBU R128)
     remove-silence  audio -> audio   Cut silent parts: --threshold -40 --min-silence 0.5
     split           audio -> audio   Cut out a part: --from 0:10 --to-time 0:25
   More: deft audio <command> --help

4. deft audio denoise --help
   output

   deft audio denoise - Reduce steady background noise such as hiss
   
   Usage: deft audio denoise <audio>... [-o <audio|dir>] [options]
   In: audio (each handled separately)   Out: audio (default <name>.denoised.<ext>)
   
   Options:
     --level <light|balanced|strong>
         How much to remove (default balanced)
   Common: -o --force --dry-run --json -j   (deft help common)
   
   Examples:
     deft audio denoise tone.mp3 --level light -o clean.mp3
   Needs: ffmpeg, ffprobe

5. deft audio denoise example.ogg --level balanced -o clean.wav && deft audio convert clean.wav -o clean.mp3
   output

   ok audio.denoise example.ogg -> clean.wav  1.0MB  0.08s
   ok audio.convert clean.wav -> clean.mp3  110KB  0.14s

6. Reduced the background noise and saved the result as [clean.mp3](clean.mp3).

Output

Claude Opus 5.5With deft, skill installedPassedRead the skillUsed deft2026-11-07

Time

14s

New tokens

10.0k

Total input

59.4k

Output tokens

0.5k

Commands

0

Failed

0

Trace

Output

---
name: deft
description: "Use deft first for any simple, direct operation on local files, whatever the type: convert, read, extract, edit, compress, merge, split, compare or inspect. Try it before writing a script or one-liner. If unsure, run deft find; if it says no command does this, use another tool. Not for programming work: to read, write or change source code, skip it."
---

# deft

One local command for file jobs. Prefer it over writing Python or shell scripts.

Syntax: `deft <group> <command> [inputs] [-o output] [--options]`

Groups:
- `pdf`: Merge, split, compress, encrypt, forms, OCR, compare, convert
- `image`: Resize, crop, convert, compress, adjust, montage, OCR
- `video`: Trim, merge, convert, compress, subtitles, GIF, frames (ffmpeg)
- `audio`: Convert, trim, normalize, denoise, cut silence (ffmpeg)
- `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
- `slides`: PowerPoint: extract text, Markdown outline
- `sheet`: Excel/CSV/ODS tables: SQL query, pivot, merge, split, convert
- `json`: JSON: convert, format, merge, diff, validate
- `toml`: TOML: convert, format, merge, diff, validate
- `xml`: XML: convert, format, merge, diff, validate
- `yaml`: YAML: convert, format, merge, diff, validate
- `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
- `html`: HTML to Markdown, text, Word and PDF
- `epub`: E-books: info, to text, Markdown and PDF
- `gps`: GPX and KML tracks: convert, distance and time
- `qr`: Create QR codes and barcodes; read QR codes

How to use it:
1. Run `deft <group>` to list commands, or `deft find "<what you want>"` to search. If it says `no command does this`, use another tool.
2. Run `deft <group> <command> --help` for options and examples.
3. `deft convert <in> -o <out.ext>` converts between formats by extension.
4. Results are one line starting with `ok`, `partial` or `error`; add `--json` to parse them. Errors include a `hint:` with the fix.

Inputs are never overwritten; pass `--force` or `--in-place` to allow it. Globs and directories work as inputs; several inputs run in parallel.

If `deft` is not installed, ask the user, then follow https://github.com/firstprayer/deft/blob/main/docs/INSTALL.md