Solution:
Root Cause: Miscalibrated Envelope Timings on Gate VST Plugin
When a Noise Gate threshold is crossed, three temporal parameters control the gate envelope:
Attack (how fast the gate opens),
Hold (how long it stays 100% open after falling below threshold), and
Release (how slowly it fades to closed). If the Attack time is too slow ($>10\text{ ms}$), initial transient consonant sounds ('T', 'P', 'C') are chopped off. If Hold and Release times are too short ($<100\text{ ms}$), word tails fade out prematurely.
Diagnostic Verification:
Record a sentence spoken at conversational volume.Listen closely to the start and end of words: if start consonants sound clipped or soft word endings disappear abruptly, the gate envelope timing is incorrectly calibrated.Step-by-Step Fix:
1Calibrate Standard Vocal Gate Envelope Parameters:
Open your Noise Gate plugin (OBS Studio Noise Gate or DAW VST).Configure parameters to these optimal baseline vocal settings:Attack Time: $2\text{ ms} - 5\text{ ms}$ (ultra-fast open to capture initial speech transients).Hold Time: $100\text{ ms} - 150\text{ ms}$ (keeps gate open during brief pauses between syllables).Release Time: $200\text{ ms} - 300\text{ ms}$ (smooth, natural exponential fade-out without abrupt cuts).2Fine-Tune Open Threshold:
Set Open Threshold to approximately $5\text{ dB}$ above your ambient room noise floor level.*Example:* If room noise rests at $-45\text{ dBFS}$, set Open Threshold to $-40\text{ dBFS}$.3Verify Natural Word Tails:
Speak a sentence that trails off softly (e.g., *"and that was the end of that..."*). Verify the trailing whisper fades out naturally without clipping.Prevention & Long-Term Monitoring:
Use Noise Expander plugins rather than hard gates whenever possible; expanders offer a smoother decay curve that protects word tails.