Using MATLAB .Write a script to play a short piece of electronic music of your c

ID: 667150 • Letter: U

Question

Using MATLAB.Write a script to play a short piece of electronic music of your composing. The
piece must conform to the following rules
1. It must be between 10 and 15 seconds long.
2. It must be sampled at the rate Fs = 8192.
3. It must incorporate at least three of the built-in sounds handel, gong, laughter,
train, chirp and splat. These can be incorporated in part, in full, or re-
peated several times in succession
4. It must include sounds playing at the same time as others.
5. It may include pure notes created using sine waves, but this is optional.
6. It may include piano notes, but this is harder than it might seem: they will
need to be resampled to match the sampling rate of 8192. Only attempt
this if you want a challenge.
7. No other sounds may be included in the piece. So no sampling your own
voice, no downloading other clips, etc.
8. The nal piece must be represented by a single array, which is played with
a single call of sound or soundsc.

9.The script you paste below must construct and play your piece from an empty
workspace

Explanation / Answer

function varargout = piano2(varargin)

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton', gui_Singleton, ...
                   'gui_OpeningFcn', @piano2_OpeningFcn, ...
                   'gui_OutputFcn', @piano2_OutputFcn, ...
                   'gui_LayoutFcn', [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT

% --- Executes just before piano2 is made visible.
function piano2_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to piano2 (see VARARGIN)

% Choose default command line output for piano2
handles.output = hObject;
handles.SampleRate = 1/20000;
handles.SoundVector = 0;
handles.TimeValue = 0.3488;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes piano2 wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = piano2_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in GShparp3.
function GShparp3_Callback(hObject, eventdata, handles)
% hObject handle to GShparp3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 207.65;
PlayNote(handles,freq);

% --- Executes on button press in ASharp3.
function ASharp3_Callback(hObject, eventdata, handles)
% hObject handle to ASharp3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 233.08;
PlayNote(handles,freq);

% --- Executes on button press in FSharp5.
function FSharp5_Callback(hObject, eventdata, handles)
% hObject handle to FSharp5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 739.99;
PlayNote(handles,freq);

% --- Executes on button press in FSharp3.
function FSharp3_Callback(hObject, eventdata, handles)
% hObject handle to FSharp3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 185.00;
PlayNote(handles,freq);

% --- Executes on button press in ASharp4.
function ASharp4_Callback(hObject, eventdata, handles)
% hObject handle to ASharp4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 466.16;
PlayNote(handles,freq);

% --- Executes on button press in DSharp5.
function DSharp5_Callback(hObject, eventdata, handles)
% hObject handle to DSharp5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 622.25;
PlayNote(handles,freq);

% --- Executes on button press in CSharp5.
function CSharp5_Callback(hObject, eventdata, handles)
% hObject handle to CSharp5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 554.37;
PlayNote(handles,freq);

% --- Executes on button press in GSharp4.
function GSharp4_Callback(hObject, eventdata, handles)
% hObject handle to GSharp4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 415.3;
PlayNote(handles,freq);

% --- Executes on button press in CSharp4.
function CSharp4_Callback(hObject, eventdata, handles)
% hObject handle to CSharp4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 277.18;
PlayNote(handles,freq);

% --- Executes on button press in G3.
function G3_Callback(hObject, eventdata, handles)
% hObject handle to G3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 196;
PlayNote(handles,freq);

% --- Executes on button press in A3.
function A3_Callback(hObject, eventdata, handles)
% hObject handle to A3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 220;
PlayNote(handles,freq);

% --- Executes on button press in B3.
function B3_Callback(hObject, eventdata, handles)
% hObject handle to B3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 246.94;
PlayNote(handles,freq);

% --- Executes on button press in C4.
function C4_Callback(hObject, eventdata, handles)
% hObject handle to C4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 261.625;
PlayNote(handles,freq);

% --- Executes on button press in D4.
function D4_Callback(hObject, eventdata, handles)
% hObject handle to D4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 293.66;
PlayNote(handles,freq);

% --- Executes on button press in E4.
function E4_Callback(hObject, eventdata, handles)
% hObject handle to E4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 329.63;
PlayNote(handles,freq);

% --- Executes on button press in F4.
function F4_Callback(hObject, eventdata, handles)
% hObject handle to F4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 349.23;
PlayNote(handles,freq);

% --- Executes on button press in G4.
function G4_Callback(hObject, eventdata, handles)
% hObject handle to G4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 392;
PlayNote(handles,freq);

% --- Executes on button press in A4.
function A4_Callback(hObject, eventdata, handles)
% hObject handle to A4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 440;
PlayNote(handles,freq);

% --- Executes on button press in B4.
function B4_Callback(hObject, eventdata, handles)
% hObject handle to B4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 493.88;
PlayNote(handles,freq);

% --- Executes on button press in C5.
function C5_Callback(hObject, eventdata, handles)
% hObject handle to C5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 523.25;
PlayNote(handles,freq);

% --- Executes on button press in D5.
function D5_Callback(hObject, eventdata, handles)
% hObject handle to D5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 587.33;
PlayNote(handles,freq);

% --- Executes on button press in E5.
function E5_Callback(hObject, eventdata, handles)
% hObject handle to E5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 659.26;
PlayNote(handles,freq);

% --- Executes on button press in F5.
function F5_Callback(hObject, eventdata, handles)
% hObject handle to F5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 698.46;
PlayNote(handles,freq);

% --- Executes on button press in FSharp4.
function FSharp4_Callback(hObject, eventdata, handles)
% hObject handle to FSharp4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 369.99;
PlayNote(handles,freq);

% --- Executes on button press in DSharp4.
function DSharp4_Callback(hObject, eventdata, handles)
% hObject handle to DSharp4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 311.13;
PlayNote(handles,freq);

% --- Executes on button press in G5.
function G5_Callback(hObject, eventdata, handles)
% hObject handle to G5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 783.99;
PlayNote(handles,freq);

% --- Executes on button press in F3.
function F3_Callback(hObject, eventdata, handles)
% hObject handle to F3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 174.61;
PlayNote(handles,freq);

% --- Executes on button press in E3.
function E3_Callback(hObject, eventdata, handles)
% hObject handle to E3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 164.81;
PlayNote(handles,freq);

% --- Executes on button press in D3.
function D3_Callback(hObject, eventdata, handles)
% hObject handle to D3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 146.83;
PlayNote(handles,freq);

% --- Executes on button press in A5.
function A5_Callback(hObject, eventdata, handles)
% hObject handle to A5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 880;
PlayNote(handles,freq);

% --- Executes on button press in C3.
function C3_Callback(hObject, eventdata, handles)
% hObject handle to C3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 130.81;
PlayNote(handles,freq);

% --- Executes on button press in B5.
function B5_Callback(hObject, eventdata, handles)
% hObject handle to B5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 987.77;
PlayNote(handles,freq);

% --- Executes on button press in GSharp5.
function GSharp5_Callback(hObject, eventdata, handles)
% hObject handle to GSharp5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 830.61;
PlayNote(handles,freq);

% --- Executes on button press in ASharp5.
function ASharp5_Callback(hObject, eventdata, handles)
% hObject handle to ASharp5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 932.33;
PlayNote(handles,freq);

% --- Executes on button press in DSharp3.
function DSharp3_Callback(hObject, eventdata, handles)
% hObject handle to DSharp3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 155.56;
PlayNote(handles,freq);

% --- Executes on button press in CSharp3.
function CSharp3_Callback(hObject, eventdata, handles)
% hObject handle to CSharp3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

freq = 138.59;
PlayNote(handles,freq);

function PlayNote(handles,freq)
% plays the note that was pressed for 1 second
% also sets the frequency value on GUI for last played note.

strFreq = num2str(freq);
set(handles.STFreqValue, 'String', strFreq);

SampleRate = handles.SampleRate;
TimeValue   = handles.TimeValue;
Samples     = 0:SampleRate:TimeValue;
SinOn       = get(handles.SinWave, 'Value');
SquareOn    = get(handles.SquareWave, 'Value');
SawtoothOn = get(handles.SawtoothWave, 'Value');

if SinOn == 1
soundVector = sin(2*pi*freq*Samples);
elseif SquareOn == 1
soundVector = square(2*pi*freq*Samples);
elseif SawtoothOn == 1
soundVector = sawtooth(2*pi*freq*Samples);
end

sound(soundVector, 1/SampleRate)

RecordOn = get(handles.Record, 'Value');

if RecordOn == 1
SoundVectorLong = handles.SoundVector;
if SoundVectorLong == 0
SoundVectorLong = soundVector;
else
SoundVectorLong = cat(2, SoundVectorLong, soundVector);
end
handles.SoundVector = SoundVectorLong;
guidata(handles.figure1, handles);
end

% --- Executes on button press in Play.
function Play_Callback(hObject, eventdata, handles)
% hObject handle to Play (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

SoundVector = handles.SoundVector;
SampleRate = handles.SampleRate;

sound(SoundVector, 1/SampleRate)

% --- Executes on button press in Stop.
function Stop_Callback(hObject, eventdata, handles)
% hObject handle to Stop (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

handles.SoundVector = 0;
guidata(handles.figure1, handles);

function Time_Callback(hObject, eventdata, handles)
% hObject handle to Time (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of Time as text
% str2double(get(hObject,'String')) returns contents of Time as a double

Value = str2double(get(hObject, 'String'));
TimeValue = 60/Value;

half = get(handles.HalfNote, 'Value');
Whole = get(handles.WholeNote, 'Value');
Eighth = get(handles.EighthNote, 'Value');

if half == 1
    TimeValue = TimeValue * 2;
elseif Whole == 1
    TimeValue = TimeValue * 4;
elseif Eighth == 1
    TimeValue = TimeValue / 2;
end