Projects:2018s1-192 Karplus-Strong Synthesis of Sound - Revision history

A1162926: /* Signal Analysis */

2018-10-19T04:11:50Z

‎Signal Analysis

A1162926 at 04:11, 19 October 2018

2018-10-19T04:11:12Z

A1162926 at 04:10, 19 October 2018

2018-10-19T04:10:38Z

A1162926 at 04:09, 19 October 2018

2018-10-19T04:09:58Z

A1162926 at 04:08, 19 October 2018

2018-10-19T04:08:57Z

A1162926: /* Results */

2018-10-19T03:56:56Z

‎Results

A1162926: /* Results */

2018-10-19T03:56:25Z

‎Results

A1162926 at 03:56, 19 October 2018

2018-10-19T03:56:06Z

A1162926: /* Results */

2018-10-19T03:55:45Z

‎Results

A1162926: /* Results */

2018-10-19T03:54:30Z

‎Results

@@ Line 159: / Line 159: @@
 Digital Signal Spectrogram
-[[File:Spec10kHzA1d.png || 500px‎]]
+[[File:Spec10kHzA1d.png | 500px]]
 ===Subjective Analysis===

← Older revision		Revision as of 04:11, 19 October 2018
Line 162:		Line 162:


−	==Subjective Analysis==	+	===Subjective Analysis===
	Individuals where asked to compare signals generated from both the analogue and digital synthesiser and provide an answer as to which signal sounded more like a particular tonal characteristic, or if no difference was perceived. The results can be seen as a bar graph. The surveys results show that opinion was divided for a number of qualities, which means that the two synthesis methods do differ tonally and produce different sounds.		Individuals where asked to compare signals generated from both the analogue and digital synthesiser and provide an answer as to which signal sounded more like a particular tonal characteristic, or if no difference was perceived. The results can be seen as a bar graph. The surveys results show that opinion was divided for a number of qualities, which means that the two synthesis methods do differ tonally and produce different sounds.

@@ Line 140: / Line 140: @@
 ==Results==
-==Signal Analysis==
+===Signal Analysis===
 Matlab was used to analyse signals from both synthesiser, to determine the harmonic content present in a particular note recorded and how these harmonics behaved over time.

@@ Line 140: / Line 140: @@
 ==Results==
-=Signal Analysis=
+==Signal Analysis==
 Matlab was used to analyse signals from both synthesiser, to determine the harmonic content present in a particular note recorded and how these harmonics behaved over time.
-=Digital Signal=
+Digital Signal
 The signals from the digital Karplus-Strong synthesiser showed cleaner spectrums in the FFT and STFT plots. This means that there was little noise present in the signal. There was still a high amount of harmonic content, but these were limited to the expected frequencies due to the comb filtering introduced by the delay. The fundamental frequencies decay exponentially with a very definite slope and very little deviation. The peaks in the FFT are purely the fundamental and harmonic frequencies expected, so there were no unwanted or extra harmonics present in the signal, this is also as expected due to the nature of the digital synthesis.
-=Analogue Signal=
+Analogue Signal
 When compared to the digital signal, the analogue signal has much more noise present, over the entire frequency range. The FFT shows a significant 50Hz and 150Hz component present in the recorded signals, this is due to interference from mains AC power, which is not present in the digital signal. The fundamental and harmonics still decay exponentially with time, but there are oscillations in the signal, which will change the character of the produced sounds. This is more like a real instrument, although not to the same degree.
@@ Line 162: / Line 162: @@
-Subjective Analysis
+==Subjective Analysis==
 Individuals where asked to compare signals generated from both the analogue and digital synthesiser and provide an answer as to which signal sounded more like a particular tonal characteristic, or if no difference was perceived. The results can be seen as a bar graph. The surveys results show that opinion was divided for a number of qualities, which means that the two synthesis methods do differ tonally and produce different sounds.

@@ Line 140: / Line 140: @@
 ==Results==
-Signal Analysis
+=Signal Analysis=
 Matlab was used to analyse signals from both synthesiser, to determine the harmonic content present in a particular note recorded and how these harmonics behaved over time.
-Digital Signal
+=Digital Signal=
 The signals from the digital Karplus-Strong synthesiser showed cleaner spectrums in the FFT and STFT plots. This means that there was little noise present in the signal. There was still a high amount of harmonic content, but these were limited to the expected frequencies due to the comb filtering introduced by the delay. The fundamental frequencies decay exponentially with a very definite slope and very little deviation. The peaks in the FFT are purely the fundamental and harmonic frequencies expected, so there were no unwanted or extra harmonics present in the signal, this is also as expected due to the nature of the digital synthesis.
-Analogue Signal
+=Analogue Signal=
 When compared to the digital signal, the analogue signal has much more noise present, over the entire frequency range. The FFT shows a significant 50Hz and 150Hz component present in the recorded signals, this is due to interference from mains AC power, which is not present in the digital signal. The fundamental and harmonics still decay exponentially with time, but there are oscillations in the signal, which will change the character of the produced sounds. This is more like a real instrument, although not to the same degree.

← Older revision		Revision as of 03:56, 19 October 2018
Line 159:		Line 159:
	Digital Signal Spectrogram		Digital Signal Spectrogram

−	[[File:Spec10kHzA1d.png \| 500px‎]]	+	[[File:Spec10kHzA1d.png \|\| 500px‎]]

@@ Line 155: / Line 155: @@
 Analogue Signal Spectrogram
-[[File:Spec10kHzA1a.png | 600px]]
+[[File:Spec10kHzA1a.png | 500px]]
 Digital Signal Spectrogram
-[[File:Spec10kHzA1d.png | 600px‎]]
+[[File:Spec10kHzA1d.png | 500px‎]]