Readme file updated with screenshot

README.md

@@ -4,6 +4,10 @@ SailTuner is a chromatic multi-temperament instrument tuner for [Sailfish OS](ht
 
 It gets audio data from microphone, find the fundamental frequency, and then display the note, the octave and the deviation according to note reference and temperament.
 
+It can also play a note, choosed with a scale flickable by user.
+
+![](https://raw.githubusercontent.com/LouJo/SailTuner/master/images/screenshots/desktop-landscape.png)
+
 ### Pitch detection algorithm
 
 The algorithm for fundamental frequency detection:
@@ -14,16 +18,32 @@ The algorithm for fundamental frequency detection:
 - octave filtering: drop a frequency if already a higher octave for same note in some conditions
 - post filter: wait few analyses to confirm or defect a note, and make a turning average for note deviation
 
-The audio input rate is 16KHz ; audio frames are analysed every 1024 samples (64ms) and a note is confirmed after 4 chunks (256ms).
+The audio input rate is 16KHz ; audio frames are analysed every 2048 samples (128ms) and a note is confirmed after 3 chunks (384ms).
 
 The note is found compared to an array of frequencies modulo one octave. The comparison array is built from a temperament and a 'A4' reference, default to 440Hz and equal temperament.
 
+### Temperaments
+
+The temperaments are stored in .csv files. At beginning, the programm scans every .csv file in the data/ dir and makes temperament list.
+
+Every line in a file is a temperament: the first column is the temperament name, and columns 2 to 13 are the notes frequencies from C-4 to B-4
+
+### Note player
+
+A frequency player module makes the signal at given frequency. There are 3 waveforms in the code:
+
+- Sinus
+- Triangle (ie pair harmonics)
+- Sinus + harmonics (1/n x f(n))
+
+Since the speaker of Jolla phone have very low intensity for low frequencies, the third solution is used, and the intensity is higher for lower notes.
+
 ======
 
 ### Copyright
 
 *Licence: GPLv3*  
 *Author: Louis-Joseph Fournier*  
-*First release date: 2016-??
+*First release date: 2016-01-19
 
 https://github.com/LouJo/SailTuner

qml/Scene.qml

@@ -26,7 +26,7 @@ Image {
 	width: 800
 	height: 400
 
-	source: "../images/bg_portrait.png"
+	source: "../images/desktop/bg_portrait.png"
 
 	DesktopTheme {
 		id: theme
@@ -47,10 +47,10 @@ Image {
 		function setNoteOctave(n, o) {}
 	}
 
-	PlayerScreen {
+	TunerScreen {
 		tuner: tuner
 		theme: theme
 
-		onTogglePlay: tuner.playing ^= true
+		//onTogglePlay: tuner.playing ^= true
 	}
 }