Audacity là audio editor miễn phí #1 thế giới 2026 — 100 triệu download, dùng bởi podcaster, musician, voice actor VN. Hỗ trợ record multi-track, noise reduction AI, effect VST, export MP3/WAV/FLAC. Bài cover setup podcast VN, workflow clean voice, so sánh Audition/Reaper.
Audacity 2026 — audio editor mã nguồn mở lâu đời nhất
Audacity là audio editor mã nguồn mở phổ biến nhất thế giới — 100M+ download từ 2000 (24 năm), maintain bởi Muse Group (công ty Đức). Free GPL, cross-platform Win/Mac/Linux. Record multi-track unlimited, edit waveform precision, effect chain (noise reduction, EQ, compressor, normalize, reverb), VST/AU plugin support. Tối ưu cho podcast + voice editing. Version 3.7 (2024) thêm: cloud share (Audio.com), AI noise removal cải thiện, FFmpeg built-in. Không native multi-track recording UX đẹp như Reaper/Logic, nhưng đủ 95% use case podcaster + voice-over creator VN.
Workflow podcast Vietnamese 30 phút
- 1 Setup recording (5 phút): File → New → 44100Hz stereo. Transport → Recording Device: mic (USB hoặc XLR qua interface). Test level: -12dB to -6dB peak.
- 2 Record (10 phút): Press Record (R). Speak naturally. Stop (Space). Multi-track: Shift+R thêm track mới cho mỗi host.
- 3 Noise reduction (3 phút): Select 2-3 giây silent → Effect → Noise Reduction → 'Get Noise Profile'. Select toàn bộ → Effect → Noise Reduction → Apply (settings: 12dB reduction, sensitivity 6, frequency smoothing 3).
- 4 Compressor + EQ voice (5 phút): Effect → Compressor (ratio 3:1, threshold -18dB, attack 0.2s, release 1s). Effect → Filter Curve EQ → boost 3-5kHz (voice clarity) + roll-off 80Hz below (rumble).
- 5 Normalize + loudness (3 phút): Effect → Loudness Normalization → -16 LUFS (Spotify/Apple Podcast standard) → Apply.
- 6 Export (4 phút): File → Export → Export as MP3 → bitrate 128kbps CBR (podcast standard). Metadata: title, artist, album art (Audacity 3.7+).
Tools → Macros → New macro 'Podcast Clean'. Thêm bước: Normalize → Noise Reduction → Compressor → Loudness. Chạy trên file mới — workflow 30 phút rút xuống 5 phút.
Audacity vs Reaper vs Adobe Audition vs Descript
| Tiêu chí | Audacity | Reaper | Adobe Audition | Descript |
|---|---|---|---|---|
| Giá | Free | $60 one-time | $21/tháng | $12/tháng |
| Platform | Win/Mac/Linux | Win/Mac/Linux | Win/Mac | Win/Mac |
| Target | Podcaster | Pro DAW | Pro + Creative Cloud | Podcaster + transcribe |
| Multi-track | ✅ | ⭐⭐⭐⭐⭐ Best | ⭐⭐⭐⭐ | ⚠️ Simple |
| AI transcribe | ❌ | ❌ | ✅ | ✅ Best |
| Learning curve | Low | High | Medium | Very Low |
Recommend 2026: - Podcaster VN budget $0: Audacity. - Musician + producer: Reaper $60 (DAW full, unlimited track, MIDI, VST). - Podcaster budget $12 + AI transcribe: Descript — edit audio bằng cách edit text. - Creative Cloud user: Adobe Audition.