Update app.py

issues with mp3 additions best practices music roll back

app.py

@@ -78,14 +78,14 @@ def set_deep_house_prompt():
 # 5) AUDIO PROCESSING FUNCTIONS
 def apply_chorus(segment):
     # Enhanced chorus effect for richer sound
-    delayed = segment - 8  # Increased to -8 dB for a subtler effect to avoid muddiness
+    delayed = segment - 6  # Reduced gain to -6 dB for a subtler effect
     delayed = delayed.set_frame_rate(segment.frame_rate)
     return segment.overlay(delayed, position=20)
 
 def apply_eq(segment):
     # Adjusted EQ for a more balanced sound
-    segment = segment.low_pass_filter(7000)  # Lowered to 7000 Hz to reduce harsh highs
-    segment = segment.high_pass_filter(100)  # Raised to 100 Hz to reduce low-end rumble
+    segment = segment.low_pass_filter(8000)  # Raised cutoff to 8kHz for brighter highs
+    segment = segment.high_pass_filter(80)  # Lowered cutoff to 80Hz for deeper bass
     return segment
 
 def apply_limiter(segment, max_db=-3.0):
@@ -99,12 +99,6 @@ def apply_final_gain(segment, target_db=-12.0):
     gain_adjustment = target_db - segment.dBFS
     return segment + gain_adjustment
 
-def apply_fade(segment, fade_in_duration=2000, fade_out_duration=2000):
-    # Apply fade-in and fade-out to the segment (durations in milliseconds)
-    segment = segment.fade_in(fade_in_duration)
-    segment = segment.fade_out(fade_out_duration)
-    return segment
-
 # 6) GENERATION & I/O FUNCTIONS
 def generate_music(instrumental_prompt: str, cfg_scale: float, top_k: int, top_p: float, temperature: float, total_duration: int, crossfade_duration: int):
     global musicgen_model
@@ -168,9 +162,6 @@ def generate_music(instrumental_prompt: str, cfg_scale: float, top_k: int, top_p
             chunk_path = f"chunk_{i}.mp3"
             torchaudio.save(temp_wav_path, audio_chunk, sample_rate, bits_per_sample=24)
             segment = AudioSegment.from_wav(temp_wav_path)
-            # Apply EQ and limiter to each chunk to maintain consistent dynamics
-            segment = apply_eq(segment)
-            segment = apply_limiter(segment, max_db=-3.0)
             segment.export(chunk_path, format="mp3", bitrate="320k")
             os.remove(temp_wav_path)
             audio_chunks.append(chunk_path)
@@ -185,8 +176,7 @@ def generate_music(instrumental_prompt: str, cfg_scale: float, top_k: int, top_p
         final_segment = AudioSegment.from_mp3(audio_chunks[0])
         for i in range(1, len(audio_chunks)):
             next_segment = AudioSegment.from_mp3(audio_chunks[i])
-            # Apply a smaller gain boost before crossfading to avoid volume spikes
-            next_segment = next_segment - 2  # Reduce by 2 dB to soften transitions
+            next_segment = next_segment + 1  # Reduced gain boost to +1 dB
             final_segment = final_segment.append(next_segment, crossfade=crossfade_duration)
 
         # Trim to exact total duration
@@ -194,9 +184,9 @@ def generate_music(instrumental_prompt: str, cfg_scale: float, top_k: int, top_p
 
         # Post-process with improved dynamics
         print("Post-processing final track...")
+        final_segment = apply_eq(final_segment)
         final_segment = apply_chorus(final_segment)
         final_segment = apply_limiter(final_segment, max_db=-3.0)
-        final_segment = apply_fade(final_segment, fade_in_duration=2000, fade_out_duration=2000)
         final_segment = final_segment.normalize(headroom=-6.0)
         final_segment = apply_final_gain(final_segment, target_db=-12.0)