Reorganized Into Folders

src/Helper/Equalizer_Darell.m

@@ -0,0 +1,20 @@
+%Written by Darell 
+
+% CONTRIBUTORS:
+% Person1: Darell
+
+% DOCUMENTATION:
+% fs is the sampling frequency
+% input is the signal input
+% EQplot is the curve generated by the EQ in the app. it should look like /----\ when everthing is set to 1 
+
+
+function output = Equalizer_Darell(input,EQplot,Fs)
+%It's an EQ written by Darell
+%   Split into frequencies and multiply by EQ 
+    Mod_Freq = fftshift(fft(input));
+    filtered_Mod_Freq = fftshift(Mod_Freq .* EQplot);
+    output = real(ifft(filtered_Mod_Freq));
+    %plot(output);
+end
+

src/Helper/MIDIDarell.m

@@ -0,0 +1,92 @@
+function output = MIDIDarell(dur,Fs)
+%Darell Chua Yun Da
+%   Detailed explanation goes here
+
+    freq = [330 350 370 392 415 440 466 494 523 554];
+    charls = ["q" "w" "e" "r" "t" "y" "u" "i" "o" "p"];
+    bytedur = 0.5;
+    x =  0:1/Fs:bytedur;
+    yz0 = zeros([1,(length(x)-1)]); 
+    y = [yz0 
+        yz0 
+        yz0 
+        yz0 
+        yz0 
+        yz0 
+        yz0 
+        yz0 
+        yz0 
+        yz0];
+
+    for c = 1:length(freq)
+        for i=1:length(x)
+            y(c,i) = 0.5*sin(2*pi*freq(c)*x(i));
+        end
+    end
+    Len = dur*Fs;
+    output = zeros([1,Len]);
+
+    
+    
+    set(gcf,'CurrentCharacter', '@');
+    figure(1)
+    
+    tStart = tic;  
+    tEnd = toc(tStart);
+    figure(1)
+    
+    while(tEnd <= dur)
+        title("Midi Popup")
+        drawnow
+        char = get(gcf,'CurrentCharacter');
+        while (char == '@' && tEnd <= dur)
+            figure(1)
+            char = get(gcf,'CurrentCharacter');
+            tEnd = toc(tStart);
+            drawnow
+        end
+        
+        n = round((tEnd/dur)*Len);
+        
+        endt = tEnd + bytedur;
+        overt = tEnd + bytedur/3;
+        if overt> dur
+            endt = dur;
+        end
+        if endt > dur
+            endt = dur;
+        end
+        endn = round(endt*Fs);
+        
+        charno = 0;
+        for i=1:length(freq)
+            if char == charls(i)
+                charno = i;
+            end
+        end
+        if charno > 0
+            sound(y(charno,:),Fs); 
+            oldout = output(n:endn);
+            output(n:endn) = oldout + y(charno,1:(endn-n+1));
+            while(tEnd < overt)
+                tEnd = toc(tStart);
+                drawnow
+            end
+            figure(1)
+            plot(output);
+            title("Midi Popup")
+            drawnow
+            set(gcf,'CurrentCharacter', '@')
+        else
+            figure(1)
+            drawnow
+            set(gcf,'CurrentCharacter', '@')
+        end
+        tEnd = toc(tStart);
+    end
+    figure(1)
+    plot(output);
+    sound(output,Fs); 
+    drawnow();
+end
+

src/Helper/amplify.m

@@ -0,0 +1,8 @@
+function output = amplify(input, multiplier)
+    %input: a 1D array representing the sound signal in the time domain
+    %multiplier: a scalar that multiplier all values in the input array to
+    %            amplify or decrease the volume.
+    %Returns: input signal scaled by the multiplier in the time domain.
+    %Author: Conner Hsu
+    output = input*multiplier;
+end

src/Helper/play_continuous.m

@@ -0,0 +1,9 @@
+function play_continuous(wave, fs, time)
+%play_continuous: Darell Continuously Playing
+    soundfile = audioplayer(wave,fs);
+    countmax = time / (length(wave) / fs);
+    for count = 0:1:countmax %change to counts/while play button active
+        playblocking(soundfile);
+    end
+end
+

src/Helper/play_wave.m

@@ -0,0 +1,5 @@
+function play_wave(wave, fs)
+%PLAY_WAVE:Arthur Lu plays a wave as sound
+    sound(wave, fs)
+end
+

src/Helper/plot_wave.m

@@ -0,0 +1,8 @@
+function plot_wave(waveform, fs, duration)
+%PLOT_WAVE:Arthur Lu plots a waveform
+    x = linspace(0, duration, fs * duration);
+    plot(x, waveform);
+    xlabel("time");
+    ylabel("amplitude");
+end
+

src/Helper/reverse.m

@@ -0,0 +1,6 @@
+function output = reverse(input)
+    %input: a 1D array representing the sound signal in the time domain
+    %returns: the input signal with its elements in reverse order.
+    %By Conner Hsu
+    output = flip(input);
+end