Software

# Proposed fix: natural brass / trumpet ending

# Goal: prevent final note from sounding cut off

# Problem is psychoacoustic, not only volume-based.

def process_final_trumpet_note(audio_tail):

"""

The final trumpet note should not stop instantly.

Human hearing expects harmonic decay, air resonance,

and a short room tail after note-off.

"""

# 1. Detect final note-off

note_off_time = detect_last_note_end(audio_tail)

# 2. Apply natural exponential release

release_time_ms = 800 # recommended range: 400–1200 ms

release_curve = "exponential"

audio_tail = apply_release_envelope(

audio_tail,

start=note_off_time,

duration_ms=release_time_ms,

curve=release_curve

)

# 3. Preserve trumpet harmonics during decay

audio_tail = preserve_harmonics(

audio_tail,

harmonics=[2, 3, 4],

decay="natural"

)

# 4. Add subtle room resonance

audio_tail = add_room_tail(

audio_tail,

wet_mix=0.06, # 4–8%

tail_time_ms=600,

room_size="small"

)

# 5. Avoid cutting the render too early

post_roll_ms = 700

audio_tail = add_post_roll_silence(

audio_tail,

duration_ms=post_roll_ms

)

# 6. Prevent limiter/noise gate from removing the tail

audio_tail = disable_hard_gate_on_tail(audio_tail)

audio_tail = keep_headroom(audio_tail, peak_db=-1.0)

return audio_tail

Expected result:

BAD: Trumpet note -> hard stop

GOOD: Trumpet note -> harmonic decay -> air resonance -> room tail -> silence

This creates perceived musical completion instead of a technical cutoff.

AI music engines should not only render the waveform, but also the perceived acoustic completion of the final note.