public DrumMachineDemoViewModel(DrumPattern pattern)
{
this.pattern = pattern;
this.tempo = 100;
PlayCommand = new DelegateCommand(Play);
StopCommand = new DelegateCommand(Stop);
}
public void Pattern_Sequencer_Should_Return_No_Mixer_Inputs_For_An_Empty_Pattern()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
var sequencer = new PatternSequencer(pattern, new TestKit());
var mixerInputs = sequencer.GetNextMixerInputs(100);
Assert.AreEqual(0, mixerInputs.Count());
}
public DrumPatternSampleProvider(DrumPattern pattern)
{
var kit = new DrumKit();
this.sequencer = new PatternSequencer(pattern, kit);
this.waveFormat = kit.WaveFormat;
mixer = new MixingSampleProvider(waveFormat);
}
public void Pattern_Sequencer_Should_Not_Return_Mixer_Inputs_For_Steps_That_Are_Outside_The_Requested_Range()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 2] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(2);
Assert.AreEqual(0, mixerInputs.Count());
}
public void Pattern_Sequencer_Should_Return_A_Non_Delayed_Mixer_Input_For_A_Beat_At_Position_Zero()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 0] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit());
var mixerInputs = sequencer.GetNextMixerInputs(100);
Assert.AreEqual(1, mixerInputs.Count());
Assert.AreEqual(0, mixerInputs.First().DelayBy);
}
public void Pattern_Sequencer_Should_Loop_Around_After_Reaching_The_End_Of_The_Pattern()
{
var pattern = new DrumPattern(new[] { "Bass Drum" }, 16);
pattern[0, 2] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(32); // twice through
Assert.AreEqual(2, mixerInputs.Count());
}
public void Pattern_Sequencer_Should_Return_Mixer_Inputs_for_Beats_On_Any_Note()
{
var pattern = new DrumPattern(new string[] { "Bass Drum", "Snare Drum" }, 16);
pattern[1, 5] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(16);
// tempo is half, so only half the beats should get read
Assert.AreEqual(1, mixerInputs.Count);
}
public void Pattern_Sequencer_Should_Return_A_Non_Delayed_Mixer_Input_For_A_Beat_At_Position_Zero()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 0] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit());
var mixerInputs = sequencer.GetNextMixerInputs(100);
Assert.AreEqual(1, mixerInputs.Count());
Assert.AreEqual(0, mixerInputs.First().DelayBy);
}
public void Pattern_Sequencer_Should_Not_Return_Mixer_Inputs_For_Steps_That_Are_Outside_The_Requested_Range()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 2] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(2);
Assert.AreEqual(0, mixerInputs.Count());
}
public DrumMachineDemoViewModel(DrumPattern pattern)
{
this.pattern = pattern;
this.tempo = 100;
PlayCommand = new RelayCommand(
() => this.Play(),
() => true);
StopCommand = new RelayCommand(
() => this.Stop(),
() => true);
}
public void Pattern_Sequencer_Should_Set_DelayBy_On_Mixer_Inputs_That_Are_Not_At_The_Start()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 1] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(2);
Assert.AreEqual(1, mixerInputs.Count());
Assert.AreEqual(1, mixerInputs.First().DelayBy);
}
public void Pattern_Sequencer_Should_Set_DelayBy_On_Mixer_Inputs_That_Are_Not_At_The_Start()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 1] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(2);
Assert.AreEqual(1, mixerInputs.Count());
Assert.AreEqual(1, mixerInputs.First().DelayBy);
}
public void Pattern_Sequencer_Should_Carry_On_From_Where_It_Left_Off_On_Second_Call()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 1] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// first read gets nothing
var mixerInputs = sequencer.GetNextMixerInputs(1);
Assert.AreEqual(0, mixerInputs.Count(), "First read");
// second read gets something
mixerInputs = sequencer.GetNextMixerInputs(1);
Assert.AreEqual(1, mixerInputs.Count(), "Second Read");
}
public DrumPatternEditor()
{
InitializeComponent();
var notes = new string[] { "Kick", "Snare", "Closed Hats", "Open Hats" };
this.pattern = new DrumPattern(notes, 16);
// auto-setup with a simple example beat
this.pattern[0, 0] = this.pattern[0, 8] = 127;
this.pattern[1, 4] = this.pattern[1, 12] = 127;
for (int n = 0; n < pattern.Steps; n++)
{
this.pattern[2, n] = 127;
}
DrawNoteNames();
DrawPattern(namesColumnWidth);
DrawGridLines(namesColumnWidth);
}
public void DelayBy_Values_Are_Relative_To_Current_Position_On_Subsequent_Calls()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 6] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// first read gets nothing
var mixerInputs = sequencer.GetNextMixerInputs(3);
Assert.AreEqual(0, mixerInputs.Count(), "First read");
// second read gets something
mixerInputs = sequencer.GetNextMixerInputs(4);
Assert.AreEqual(1, mixerInputs.Count(), "Second Read");
Assert.AreEqual(3, mixerInputs.First().DelayBy, "DelayBy");
}
public DrumPatternEditor()
{
InitializeComponent();
var notes = new string[] { "Kick", "Snare", "Closed Hats", "Open Hats" };
this.pattern = new DrumPattern(notes, 16);
// auto-setup with a simple example beat
this.pattern[0, 0] = this.pattern[0, 8] = 127;
this.pattern[1, 4] = this.pattern[1, 12] = 127;
for (int n = 0; n < pattern.Steps; n++)
{
this.pattern[2, n] = 127;
}
DrawNoteNames();
DrawPattern(namesColumnWidth);
DrawGridLines(namesColumnWidth);
}
public void DelayBy_Values_Should_Be_Correct_On_Wraparound()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 0] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// read 12 of the 16 steps
var mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(1, mixerInputs.Count, "First read");
// read 12 more - will wrap around
mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(1, mixerInputs.Count, "Second Read");
Assert.AreEqual(4, mixerInputs[0].DelayBy, "Inputs[0].DelayBy");
}
public void When_Tempo_Is_Halved_DelayBy_Is_Doubled()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
for (int n = 0; n < pattern.Steps; n++)
{
pattern[0, n] = 127;
}
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
sequencer.Tempo = 60; // half tempo
var mixerInputs = sequencer.GetNextMixerInputs(16);
// tempo is half, so only half the beats should get read
Assert.AreEqual(2, mixerInputs[1].DelayBy, "First beat DelayBy");
}
public void Tempo_Can_Be_Changed()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
for (int n = 0; n < pattern.Steps; n++)
{
pattern[0, n] = 127;
}
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
sequencer.Tempo = 60; // half tempo
var mixerInputs = sequencer.GetNextMixerInputs(16);
// tempo is half, so only half the beats should get read
Assert.AreEqual(8, mixerInputs.Count, "First read");
}
public void Multiple_DelayBy_Values_Are_All_Relative_To_Current_Position_Before_Calling_GetNextMixerInputs()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 6] = 127;
pattern[0, 7] = 127;
pattern[0, 8] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// first read gets nothing
var mixerInputs = sequencer.GetNextMixerInputs(3);
Assert.AreEqual(0, mixerInputs.Count, "First read");
// second read gets something
mixerInputs = sequencer.GetNextMixerInputs(10);
Assert.AreEqual(3, mixerInputs.Count, "Second Read");
Assert.AreEqual(3, mixerInputs[0].DelayBy, "Inputs[0].DelayBy");
Assert.AreEqual(4, mixerInputs[1].DelayBy, "Inputs[1].DelayBy");
Assert.AreEqual(5, mixerInputs[2].DelayBy, "Inputs[2].DelayBy");
}
public void DelayBy_Values_Should_Be_Correct_On_Subsequent_Read_After_Wraparound()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 0] = 127;
pattern[0, 10] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// read 12 of the 16 steps (ends at pos 12)
var mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(2, mixerInputs.Count, "First read");
// read 12 more - will wrap around (ends at pos 8)
mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(1, mixerInputs.Count, "Second Read");
Assert.AreEqual(4, mixerInputs[0].DelayBy, "Inputs[0].DelayBy");
// read 12 more - (start from pos 8, ends at pos 4)
mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(2, mixerInputs[0].DelayBy, "3rd Read Inputs[0].DelayBy");
Assert.AreEqual(8, mixerInputs[1].DelayBy, "3rd Read Inputs[1].DelayBy");
}
public void Multiple_DelayBy_Values_Are_All_Relative_To_Current_Position_Before_Calling_GetNextMixerInputs()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 6] = 127;
pattern[0, 7] = 127;
pattern[0, 8] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// first read gets nothing
var mixerInputs = sequencer.GetNextMixerInputs(3);
Assert.AreEqual(0, mixerInputs.Count, "First read");
// second read gets something
mixerInputs = sequencer.GetNextMixerInputs(10);
Assert.AreEqual(3, mixerInputs.Count, "Second Read");
Assert.AreEqual(3, mixerInputs[0].DelayBy, "Inputs[0].DelayBy");
Assert.AreEqual(4, mixerInputs[1].DelayBy, "Inputs[1].DelayBy");
Assert.AreEqual(5, mixerInputs[2].DelayBy, "Inputs[2].DelayBy");
}
public void DelayBy_Values_Should_Be_Correct_On_Wraparound()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 0] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// read 12 of the 16 steps
var mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(1, mixerInputs.Count, "First read");
// read 12 more - will wrap around
mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(1, mixerInputs.Count, "Second Read");
Assert.AreEqual(4, mixerInputs[0].DelayBy, "Inputs[0].DelayBy");
}
public PatternSequencer(DrumPattern drumPattern, DrumKit kit)
{
this.drumKit = kit;
this.drumPattern = drumPattern;
this.Tempo = 120;
}
public void DelayBy_Values_Should_Be_Correct_On_Subsequent_Read_After_Wraparound()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 0] = 127;
pattern[0, 10] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// read 12 of the 16 steps (ends at pos 12)
var mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(2, mixerInputs.Count, "First read");
// read 12 more - will wrap around (ends at pos 8)
mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(1, mixerInputs.Count, "Second Read");
Assert.AreEqual(4, mixerInputs[0].DelayBy, "Inputs[0].DelayBy");
// read 12 more - (start from pos 8, ends at pos 4)
mixerInputs = sequencer.GetNextMixerInputs(12);
Assert.AreEqual(2, mixerInputs[0].DelayBy, "3rd Read Inputs[0].DelayBy");
Assert.AreEqual(8, mixerInputs[1].DelayBy, "3rd Read Inputs[1].DelayBy");
}
public void Tempo_Can_Be_Changed()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
for (int n = 0; n < pattern.Steps; n++)
pattern[0, n] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
sequencer.Tempo = 60; // half tempo
var mixerInputs = sequencer.GetNextMixerInputs(16);
// tempo is half, so only half the beats should get read
Assert.AreEqual(8, mixerInputs.Count, "First read");
}
public void When_Tempo_Is_Halved_DelayBy_Is_Doubled()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
for (int n = 0; n < pattern.Steps; n++)
pattern[0, n] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
sequencer.Tempo = 60; // half tempo
var mixerInputs = sequencer.GetNextMixerInputs(16);
// tempo is half, so only half the beats should get read
Assert.AreEqual(2, mixerInputs[1].DelayBy, "First beat DelayBy");
}
public void Pattern_Sequencer_Should_Return_Mixer_Inputs_for_Beats_On_Any_Note()
{
var pattern = new DrumPattern(new string[] { "Bass Drum", "Snare Drum" }, 16);
pattern[1, 5] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(16);
// tempo is half, so only half the beats should get read
Assert.AreEqual(1, mixerInputs.Count);
}
public void Pattern_Sequencer_Should_Loop_Around_After_Reaching_The_End_Of_The_Pattern()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 2] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
var mixerInputs = sequencer.GetNextMixerInputs(32); // twice through
Assert.AreEqual(2, mixerInputs.Count());
}
public void DelayBy_Values_Are_Relative_To_Current_Position_On_Subsequent_Calls()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 6] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// first read gets nothing
var mixerInputs = sequencer.GetNextMixerInputs(3);
Assert.AreEqual(0, mixerInputs.Count(), "First read");
// second read gets something
mixerInputs = sequencer.GetNextMixerInputs(4);
Assert.AreEqual(1, mixerInputs.Count(), "Second Read");
Assert.AreEqual(3, mixerInputs.First().DelayBy, "DelayBy");
}
public PatternSequencer(DrumPattern drumPattern, DrumKit kit)
{
drumKit = kit;
this.drumPattern = drumPattern;
Tempo = 120;
}
public void Pattern_Sequencer_Should_Carry_On_From_Where_It_Left_Off_On_Second_Call()
{
var pattern = new DrumPattern(new string[] { "Bass Drum" }, 16);
pattern[0, 1] = 127;
var sequencer = new PatternSequencer(pattern, new TestKit(CalculateSampleRateForTempo(120)));
// first read gets nothing
var mixerInputs = sequencer.GetNextMixerInputs(1);
Assert.AreEqual(0, mixerInputs.Count(), "First read");
// second read gets something
mixerInputs = sequencer.GetNextMixerInputs(1);
Assert.AreEqual(1, mixerInputs.Count(), "Second Read");
}