fix peaks

app/models/track.rb

@@ -187,6 +187,20 @@ def reprocess!
     update_peaks
   end
 
+  def process_with_mp3
+
+    temp_file = Tempfile.new(["audio", ".mp3"], binmode: true)
+
+    # Download the blob to the temp file in chunks
+    mp3_audio.download do |chunk|
+      temp_file.write(chunk)
+    end
+
+    temp_file.rewind
+
+    update_peaks
+  end
+
   def update_mp3(temp_file = nil)
     if temp_file.nil?
       # Create a temp file

app/services/peaks_generator.rb

@@ -65,12 +65,11 @@ def calculate_pixels_per_second
   end
 
   def normalize(input)
-    min, max = input.minmax
-    new_min, new_max = [-1.0, 1.0]
+    # Find the maximum absolute value in the array
+    max_abs_value = input.map(&:abs).max.to_f
 
-    input.map do |x|
-      new_min + ((x - min) / (max - min)) * (new_max - new_min)
-    end.map { |x| x.round(3) }
+    # Normalize each value in the inputay
+    input.map { |val| val / max_abs_value }
   end
 
   def ffprobe_path

spec/models/peaks_generator_spec.rb

@@ -0,0 +1,22 @@
+require "rails_helper"
+
+def normalize(input)
+    # Find the maximum absolute value in the array
+    max_abs_value = input.map(&:abs).max.to_f
+
+    # Normalize each value in the inputay
+    input.map { |val| val / max_abs_value }
+end
+
+describe "something to be performed" do
+  context "under condition" do
+    it "behaves like" do
+
+      input = [-40,45,-45,56,-41,48,-34,45,-32,40,-24,37,-39,52]
+
+      peaks = normalize(input)
+      expect(peaks).to include(1.0)
+
+    end
+  end
+end