Audio Engineering5 min readNov 2, 2026
How to Improve Audio Quality Before Transcription
Simple pre-processing tricks: EQ filtering, stem separation, and noise gating to achieve clean MIDI conversions.
By BlackRatio Studio Team
Audio CleanupAudio PrepStudio Tips
The golden rule of audio transcription is simple: Garbage in, garbage out. Investing 60 seconds into basic audio pre-processing dramatically improves transcription accuracy.
3 Essential Audio Prep Steps
- High-Pass Filter the Sub-Bass: Apply an 18dB/octave high-pass filter at 60Hz-80Hz to eliminate sub-audible mic rumbles and room vibrations.
- Noise Gating: Use a subtle noise gate to silence background air and preamp hiss during pauses between musical phrases.
- Normalize Gain: Peak normalize your recording to -1.0dBFS so the detection engine receives optimal dynamic amplitude without digital clipping.