v0.51 alpha

Readded a button for linear shifting to make it a little bit easier for the end user. They would have had to make sure that it's being shifted with order 0 to do linear shifting but now it's just a nice little button

Author: natdorshimer

dev notes/9.19.20 v0.5-alpha release.txt

@@ -0,0 +1 @@
+v0.5 Alpha is out :)The design I ended up settling upon was a user controlled raised cosine window. The user can control the order and attenuation of the cosine. The way it works is like this. center_freq = midpoint between lower and higher window freq indicesif shifting freq up, the shifting index modulation is x[n] = cos(w*(n-center_freq))^order if lower_index <= n <= fftSize , 0 otherwiseif shifting downx[n] = cos(w*(n-center_freq))^order if 0 <= n <= higher_index , 0 otherwisew is calculated given the attenuation the user selects. The ideal is to havex[higher_index] and x[lower_index] = attenuation, or 	cos(w*(higher_index-center_freq)) = (attenuation)^(1/order)	w = acos(attenuation^(1/order))/(higher_index-center_freq)and then lastly, shift_map[n] = shift_index*x[n]x[n] simply provides a modulation on how far things get shiftedThis way the user can control how much frequencies beyond the window shift. Lower order / higher attenuation will mean that more values beyond the window will shift.

dev notes/TODO list.txt

@@ -1 +1 @@
-S+ Features TODO listSpectrogram Plus Resonance Processing Tools. Aka Spec+, S+, S++, etcI'm not a name designer okStage 1:* Implement basic frequency dependent frequency shifters	* See: NLFS brainstorming* Make the GUI for the frequency shifter windows-> Prototyping / Alpha build   ETA: 1 weekStage 2:* Study more signal processing concepts, especially    in regards to selective frequency shifting * Study more voice mechanics to make sure I know exactly what different resonant  shifts do	* Make a general map relating resonant shifts with the accompanied sound	* Come up with different types of audio filters that would accompany those 	shifts* Perform testing on audio input and output	* Will need to collect audio samples / create audio samples for test cases 	* How will these tests be evaluated?		* Objective Test: Calculate if the filter works *as intended*			* Does it shift it where I wanted it to? Like does the calc work		* But even if filter works as intended, we have to most likely be purely 		  subjective about how it sounds, especially in regards to audio. The		  goal is to produce specific sound shifts from the filtering.		* But we can be somewhat objective about that, especially by noting the		  changes across a wide variety of audio samples to determine if it		  achieves the desired output. * Diagnose issues, fix issues, iterate-> Beta    ETA free time dependentFinal Stage:* Refine GUI + reevaluate project needs* Think about how I want to incorporate the vocal technique -> resonant shift map	* Decide if worth implementing before 1.0 or save that for the next ver.-> Initial Version Release (1.0) General notes: * Consider parallelization of ISTFT and STFT if needed for real time calculation. Currently leaving real time calculation to Spectrogram so not necessary atm* Consider changing the name of FFTs to STFT. While the structure is technically a collection of FFTs and the data used to create the FFTs, hence, FFTs, it is much more accurately a Short Time Fourier Transform of a signal.* Consider deprecating Spectrogram.cs and moving to my custom FFTs class
+S+ Features TODO listSpectrogram Plus Resonance Processing Tools. Aka Spec+, S+, S++, etcAlpha build out! v0.5-alpha. Stage 1 done :^)Stage 2:* Perform testing on audio input and output	* Mostly by ear sounding for now 	* Do shifted resonances produce natural sounds?		* If not, how can I improve on my shifting to make it sound more natural? * Study more voice mechanics to make sure I know exactly what different resonant  shifts do	* Make a general map relating resonant shifts with the accompanied sound	* Come up with different types of audio filters that would accompany those 	shifts-> Beta    ETA free time dependentFinal Stage:* Refine GUI + reevaluate project needs* Think about how I want to incorporate the vocal technique -> resonant shift map	* Decide if worth implementing before 1.0 or save that for the next ver.-> Initial Version Release (1.0) General notes: * Consider parallelization of ISTFT and STFT if needed for real time calculation. Currently leaving real time calculation to Spectrogram so not necessary atm* Consider changing the name of FFTs to STFT. While the structure is technically a collection of FFTs and the data used to create the FFTs, hence, FFTs, it is much more accurately a Short Time Fourier Transform of a signal.* Consider deprecating Spectrogram.cs and moving to my custom FFTs class

src/Windows/Audio Processing Windows/FrequencyShifterWindow.xaml

@@ -6,12 +6,13 @@
         xmlns:local="clr-namespace:SpecPlus.Windows"
         mc:Ignorable="d"
         Title="FrequencyDependentShifterWindow"
-        Height="210" Width="250"
+        Height="245" Width="250"
         ResizeMode="NoResize">
     <Grid x:Name="FrequencyDependentShifterGrid">
         <Grid.RowDefinitions>
             <RowDefinition Height="10"/>
             <RowDefinition Height="auto"/>
+            <RowDefinition Height="auto"/>
             <RowDefinition Height="1*"/>
         </Grid.RowDefinitions>
         <Grid.ColumnDefinitions>
@@ -45,5 +46,7 @@
         </Grid>
         <Button x:Name="ButtonApplyToWindow" Click="ButtonApplyToWindow_Click"
                 Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="2" Margin="0,0,10,20" Content="Apply to Window"/>
+        <Button x:Name="ButtonShiftAll" Click="ButtonShiftAll_Click"
+                Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="2" Margin="0,0,10,20" Content="Linear shift all"/>
     </Grid>
 </Window>

src/Windows/Audio Processing Windows/FrequencyShifterWindow.xaml.cs

@@ -52,5 +52,7 @@ private void ButtonApplyToWindow_Click(object sender, RoutedEventArgs e)
                 order: (int)SliderOrder.Value, thresh: SliderThreshold.Value);
         }
 
+        private void ButtonShiftAll_Click(object sender, RoutedEventArgs e)=>
+            AudioAnalysis.Processing.FrequencyShifter(parentRef.GetSTFT(), (int)SliderFreqShift.Value);
     }
 }

src/Windows/Audio Processing Windows/WhiteNoiseFilterWindow.xaml.cs

@@ -11,7 +11,6 @@
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Shapes;
-using AudioAnalysis;
 using SpecPlus.Design;
 using System.Windows.Threading;
 

src/Windows/SpecPlusWindow.xaml.cs

@@ -1,33 +1,15 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Threading;
 using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
-using System.ComponentModel;
-using System.Data;
-using System.Diagnostics;
-using System.Reflection;
 using Spectrogram;
-using System.IO;
-using System.Globalization;
-using System.CodeDom;
-using NAudio.Wave.SampleProviders;
 using AudioAnalysis;
 using Microsoft.Win32;
 using FftSharp;
-using NAudio.Wave;
-using SpecPlus;
 using System.Windows.Controls.Primitives;
 using SpecPlus.Design;
 using SpecPlus.Windows;
@@ -269,6 +251,22 @@ public FFTs GetFFTs()
             return stft;
         }
 
+        private (int lowerTimeIndex, int higherTimeIndex, int lowerFreqIndex, int higherFreqIndex) WindowPoints()
+        {
+            Point startPoint = selectedWindow.startPoint;
+            Point endPoint = selectedWindow.endPoint;
+            (int timeIndex1, int freqIndex1) = PositionToIndices(startPoint);
+            (int timeIndex2, int freqIndex2) = PositionToIndices(endPoint);
+            if (freqIndex2 < freqIndex1)
+                (freqIndex1, freqIndex2) = (freqIndex2, freqIndex1);
+            if (timeIndex2 < timeIndex1)
+                (timeIndex1, timeIndex2) = (timeIndex2, timeIndex1);
+
+            return (timeIndex1, timeIndex2, freqIndex1, freqIndex2);
+
+        }
+
+
         /**
          * Event Handlers
          */
@@ -353,21 +351,6 @@ private void PaintGrid_MouseWheel(object sender, MouseWheelEventArgs e)
 
         private void PauseButton_Click(object sender, RoutedEventArgs e) => TogglePause();
 
-        private (int lowerTimeIndex, int higherTimeIndex, int lowerFreqIndex, int higherFreqIndex) WindowPoints()
-        {
-            Point startPoint = selectedWindow.startPoint;
-            Point endPoint = selectedWindow.endPoint;
-            (int timeIndex1, int freqIndex1) = PositionToIndices(startPoint);
-            (int timeIndex2, int freqIndex2) = PositionToIndices(endPoint);
-            if (freqIndex2 < freqIndex1)
-                (freqIndex1, freqIndex2) = (freqIndex2, freqIndex1);
-            if (timeIndex2 < timeIndex1)
-                (timeIndex1, timeIndex2) = (timeIndex2, timeIndex1);
-
-            return (timeIndex1, timeIndex2, freqIndex1, freqIndex2);
-
-        }
-
 
         private void ButtonFrequencyShifter_Click(object sender, RoutedEventArgs e) =>
             FrequencyShifterWindow.OpenWindow(this);