song plus background mp3 merge pyton

worked perfect

#worked perfect, two songs merging, excelling.

!pip install pydub --quiet

!apt install ffmpeg --quiet

from pydub import AudioSegment

import os

# Input files

ACTUAL_MP3 = "/content/actual.mp3"

BACKGROUND_MP3 = "/content/background.mp3"

OUTPUT_MP3 = "/content/final_with_bg.mp3"

# 🎧 Volume settings (can customize)

actual_gain_db = 0            # 0 dB (100% focus on actual audio)

background_gain_db = -20      # -20 dB (~30% focus on background)

# Actual (speech/music) focus:    100% (volume = 0 dB)

# Background music focus:         ~30% (volume = -20 dB)

# Users can modify `background_gain_db` for custom balance

#Background Focus Approx Gain (dB)

#30% focus  -20 dB

#40% focus  -15 dB

#50% focus  -10 dB

#https://prabodhadevotee.blogspot.com/2025/04/song-plus-background-mp3-merge-pyton.html

# Load actual and background audio

actual = AudioSegment.from_file(ACTUAL_MP3)

background = AudioSegment.from_file(BACKGROUND_MP3)

# 🔁 Loop background if shorter than actual

if len(background) < len(actual):

    loops_required = (len(actual) // len(background)) + 1

    background = background * loops_required

# 🪄 Match background length and apply gain

background = background[:len(actual)].apply_gain(background_gain_db)

actual = actual.apply_gain(actual_gain_db)

# 🎛️ Mix audio (overlay background onto actual)

combined = actual.overlay(background)

# 💾 Export final output

combined.export(OUTPUT_MP3, format="mp3")

print(f"✅ Final mixed audio saved to: {OUTPUT_MP3}")

--------- 

chatgpt

# 🎧 Default Volume Focus:

# Actual (speech/music) focus:    100% (volume = 0 dB)

# Background music focus:         ~30% (volume = -20 dB)

# Users can modify `background_gain_db` for custom balance.

-----------------------------------------

Code: Merge Actual MP3 with Background (Looped if Shorter)

python
from pydub import AudioSegment
import os

# Input files
ACTUAL_MP3 = "/content/actual.mp3"
BACKGROUND_MP3 = "/content/background.mp3"
OUTPUT_MP3 = "/content/final_with_bg.mp3"

# 🎧 Volume settings (can customize)
actual_gain_db = 0            # 0 dB (100% focus on actual audio)
background_gain_db = -20      # -20 dB (~30% focus on background)

# Load actual and background audio
actual = AudioSegment.from_file(ACTUAL_MP3)
background = AudioSegment.from_file(BACKGROUND_MP3)

# 🔁 Loop background if shorter than actual
if len(background) < len(actual):
    loops_required = (len(actual) // len(background)) + 1
    background = background * loops_required

# 🪄 Match background length and apply gain
background = background[:len(actual)].apply_gain(background_gain_db)
actual = actual.apply_gain(actual_gain_db)

# 🎛️ Mix audio (overlay background onto actual)
combined = actual.overlay(background)

# 💾 Export final output
combined.export(OUTPUT_MP3, format="mp3")
print(f"✅ Final mixed audio saved to: {OUTPUT_MP3}")

-------------
Background Focus
Approx Gain (dB)
30% focus
-20 dB
40% focus
-15 dB
50% focus
-10 dB

You can now upload your files as:

• /content/actual.mp3 (TTS or music)

• /content/background.mp3 (loopable background)

Would you like an optional GUI slider for adjusting background volume live in Colab?

You said:

# Actual (speech/music) focus: 100% (volume = 0 dB) # Background music focus: ~30% (volume = -20 dB) how modify, if actual 100%, background 40%; most 3 used customer choice?

ChatGPT said:

Good question. Here's how you modify it:

---

If you want:

• Actual (speech/music) focus: 100% (still at 0 dB → no change)

• Background music focus: 40% (instead of default 30%),
  then adjust background gain to around -15 dB.

👉 Volume guide:

Background Focus	Approx Gain (dB)
30% focus	-20 dB
40% focus	-15 dB
50% focus	-10 dB