diff --git a/semestralka2/analyza.m b/semestralka2/analyza.m
new file mode 100644
index 0000000..170a652
--- /dev/null
+++ b/semestralka2/analyza.m
@@ -0,0 +1,72 @@
+clc;
+close all;
+clear all;
+
+[y, Fs] = audioread('sem2.wav');
+t = (0:length(y)-1) / Fs;
+
+figure; %1
+plot(t, y);
+xlabel('Time');
+ylabel('Amplitude');
+title('Waveform sem2.wav');
+grid on;
+
+[y1, Fs1] = audioread('flac.wav');
+[y2, Fs2] = audioread('flac2.wav');
+
+t1 = (0:length(y1)-1) / Fs1;
+t2 = (0:length(y2)-1) / Fs2;
+
+figure; %2
+plot(t1, y1);
+xlabel('Time [s]');
+ylabel('Amplitude');
+title('Waveform flac.wav');
+grid on;
+
+figure; %3
+plot(t2, y2);
+xlabel('Time [s]');
+ylabel('Amplitude');
+title('Waveform flac2.wav');
+grid on;
+
+N1 = length(y1);
+N2 = length(y2);
+
+X1 = fft(y1);
+X2 = fft(y2);
+
+freq_shift1 = (-N1/2 : N1/2 - 1) * (Fs1 / N1);
+freq_shift2 = (-N2/2 : N2/2 - 1) * (Fs2 / N2);
+
+figure; %4
+subplot(2,1,1);
+plot(freq_shift1, real(fftshift(X1)), 'b');
+title('Reálna časť posunutého spektra flac.wav');
+xlabel('Frekvencia [Hz]');
+ylabel('Reálna hodnota');
+grid on;
+subplot(2,1,2);
+plot(freq_shift1, imag(fftshift(X1)), 'r');
+title('Imaginárna časť posunutého spektra flac.wav');
+xlabel('Frekvencia [Hz]');
+ylabel('Imaginárna hodnota');
+grid on;
+set(gcf, 'Color', 'none'); set(gca, 'Color', 'none');
+
+figure; %5
+subplot(2,1,1);
+plot(freq_shift2, real(fftshift(X2)), 'b');
+title('Reálna časť posunutého spektra flac2.wav');
+xlabel('Frekvencia [Hz]');
+ylabel('Reálna hodnota');
+grid on;
+subplot(2,1,2);
+plot(freq_shift2, imag(fftshift(X2)), 'r');
+title('Imaginárna časť posunutého spektra flac2.wav');
+xlabel('Frekvencia [Hz]');
+ylabel('Imaginárna hodnota');
+grid on;
+set(gcf, 'Color', 'none'); set(gca, 'Color', 'none');