Lazy init AudioAdjustments in AdjustableAudioComponent usage

[peppy]

This is beneficial due to the number of samples which are retrieves during BDL load but never played. In cases they aren't played the Samples retrieved from a SampleFactory can avoid the AudioAdjustments overhead, which will now only be instantiated when they are played (see

osu-framework/osu.Framework/Audio/Sample/SampleBassFactory.cs

Lines 100 to 105 in 32e7571

	public Sample CreateSample() => new SampleBass(this, mixer) { OnPlay = onPlay };
	private void onPlay(Sample sample)
	{
	AddItem(sample);
	}

)

Logging can be performed using this adjustment:

diff --git a/osu.Framework/Audio/AdjustableAudioComponent.cs b/osu.Framework/Audio/AdjustableAudioComponent.cs
index 41b834da0..f5813a763 100644
--- a/osu.Framework/Audio/AdjustableAudioComponent.cs
+++ b/osu.Framework/Audio/AdjustableAudioComponent.cs
@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Bindables;
+using osu.Framework.Statistics;
 
 namespace osu.Framework.Audio
 {
@@ -60,8 +61,16 @@ protected internal AudioAdjustments Adjustments
         /// </summary>
         public BindableNumber<double> Tempo => Adjustments.Tempo;
 
-        public void AddAdjustment(AdjustableProperty type, IBindable<double> adjustBindable) =>
+        protected AdjustableAudioComponent()
+        {
+            GlobalStatistics.Get<int>("audio", "aac instantiated").Value++;
+        }
+
+        public void AddAdjustment(AdjustableProperty type, IBindable<double> adjustBindable)
+        {
+            logAdjustment();
             Adjustments.AddAdjustment(type, adjustBindable);
+        }
 
         public void RemoveAdjustment(AdjustableProperty type, IBindable<double> adjustBindable) =>
             Adjustments.RemoveAdjustment(type, adjustBindable);
@@ -95,6 +104,7 @@ protected override void UpdateState()
 
         public void BindAdjustments(IAggregateAudioAdjustment component)
         {
+            logAdjustment();
             Adjustments.BindAdjustments(component);
         }
 
@@ -108,6 +118,17 @@ public void BindAdjustments(IAggregateAudioAdjustment component)
 
         public IBindable<double> AggregateTempo => Adjustments.AggregateTempo;
 
+        private bool wasAdjusted;
+
+        private void logAdjustment()
+        {
+            if (wasAdjusted)
+                return;
+
+            GlobalStatistics.Get<int>("audio", "aac bound").Value++;
+            wasAdjusted = true;
+        }
+
         protected override void Dispose(bool disposing)
         {
             base.Dispose(disposing);

At song select:

Before:

After:

Note that there are other potential areas that could also fix this (ie. stopping every single instance of HoverClickSounds from fetching its own samples osu! side) but I feel this is beneficial to also optimise at a lower level, since retrieving samples from a SampleStore for (potential) future use is a common one.