Some minor improvements to samples.

Author: alexrp

src/samples/cancellation/Program.cs

@@ -1,7 +1,10 @@
-await OutAsync("Reading cooked input: ");
-await OutLineAsync(await ReadLineAsync());
+await OutAsync("Reading cooked input and cancelling after 5 seconds: ");
 
-await OutLineAsync("Entering raw mode and reading input. Then canceling after 5 seconds.");
+using var cts1 = new CancellationTokenSource(delay: TimeSpan.FromSeconds(5));
+
+await OutLineAsync(await ReadLineAsync(cts1.Token));
+
+await OutLineAsync("Entering raw mode and reading input. Then cancelling after 5 seconds.");
 await OutLineAsync();
 
 var array = new byte[1];
@@ -14,15 +17,15 @@
     {
         await Task.Delay(TimeSpan.FromSeconds(5));
 
-        using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+        using var cts2 = new CancellationTokenSource(delay: TimeSpan.FromSeconds(5));
 
         await OutAsync($"Round {i}...\r\n");
 
         while (true)
         {
             try
             {
-                if (await ReadAsync(array, cts.Token) == 0)
+                if (await ReadAsync(array, cts2.Token) == 0)
                     break;
             }
             catch (OperationCanceledException)

src/samples/processes/Program.cs

@@ -1,6 +1,6 @@
 await OutLineAsync("Launching 'bash'...");
 
-using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(10));
+using var cts = new CancellationTokenSource(delay: TimeSpan.FromSeconds(10));
 
 var bash =
     new ChildProcessBuilder()

src/samples/sounds/Program.cs

@@ -1,8 +1,10 @@
+const int Volume = 3;
+
 await OutAsync(
     new ControlBuilder()
-        .PlayNotes(3, 2, [1, 3, 5])
-        .PlayNotes(3, 8, [6, 10, 8, 11])
-        .PlayNotes(3, 4, [10, 11, 13, 10])
-        .PlayNotes(3, 8, [8, 11])
-        .PlayNotes(3, 4, [10, 11, 13, 10, 11, 13, 15, 17])
-        .PlayNotes(3, 8, [18, 17, 18]));
+        .PlayNotes(Volume, duration: 2, [1, 3, 5])
+        .PlayNotes(Volume, duration: 8, [6, 10, 8, 11])
+        .PlayNotes(Volume, duration: 4, [10, 11, 13, 10])
+        .PlayNotes(Volume, duration: 8, [8, 11])
+        .PlayNotes(Volume, duration: 4, [10, 11, 13, 10, 11, 13, 15, 17])
+        .PlayNotes(Volume, duration: 8, [18, 17, 18]));