High Resolution Audio • Crash Cymbal • Audio Analysis

High Resolution Audio - Audio Analysis

This Audio Analysis shows a Crash Cymbal in different resolutions with uncompressed audio codec (WAV):
➨ Differences in the frequency spectrum in relation to the sample rate (in kHz / rows 2, 3, 9 and 10)
➨ Differences in the noise floor and the quantization noise in relation with the amplitude resolution (in bit / row 6-8 and 17-19)
➨ Phase and frequency shifts above 10 kHz in case of downsampling to 44.1 kHz (rows 4, 5 and 10-16)
➨ Quantization and interpolation errors after sample rate conversion from the original 192 kHz source (rows 17-19)

Diese Audioanalyse zeigt ein Crashbecken in verschiedenen Auflösungen mit unkomprimiertem Audiocodec (WAV):
➨ Unterschiede im Frequenzspektrum im Verhältnis zur Abtastrate (in kHz / Zeilen 2, 3, 9 und 10)
➨ Unterschiede im Rauschpegel und dem Quantisierungsrauschen im Verhältnis zur Amplitudenauflösung (in bit / Zeilen 6-8 und 17-19)
➨ Phasen- und Frequenzverschiebungen oberhalb 10 kHz bei Heruntertaktung auf 44,1 kHz (Zeilen 4, 5 und 10-16)
➨ Quantisierungs- und Interpolationsfehler nach Abtastratenkonvertierung aus der Originalquelle in 192 kHz (Zeilen 17-19)

Position:	90° at the left side
Runtime Delay (Laufzeitverzögerung / Interaureal Time Difference):	0.42 ms 80 samples at 192 kHz 18 samples at 44.1 kHz
A/B distance (Mikrofonbasis):	14 cm
Calculation formula: A/B distance = Delta t * c / sin azimuth (c = speed of sound / Schallgeschwindigkeit)
Degree of correlation L/R > 11 kHz (row 10 / Korrelationsgrad, Zeile 10)	cos φ = 0.85	φ = 32° (deg)
Degree of correlation L/R = 8.829 kHz Sinus (row 12 / Zeile 12)	cos φ = 0.89	φ = 27° (deg)
Degree of correlation L/R > 11 kHz (row 11 / conversion after FFT / Z. 11)	cos φ = 0.64	φ = 50° (deg)
Degree of correlation L/R = 8.829 kHz Sinus (row 14 / after FFT / Z. 14)	cos φ = 0.57	φ = 55° (deg)
Time until first 11 kHz wave - at 44.1 kHz (row 10-16 / Zeile 10-16)	13 Samples	1:44.113*	294.8 ns
Degree of correlation L/R > 11 Khz (row 10 / Korrelationsgrad, Zeile 10)	cos φ = 0.76	φ = 41° (deg)
Degree of correlation L/R = 9.563 Khz Sinus (row 12 / Zeile 12)	cos φ = 0.78	φ = 39° (deg)
Degree of correlation L/R > 11 Khz (row 11 / conversion after FFT / Z. 11)	cos φ = 0.68	φ = 47° (deg)
Degree of correlation L/R = 9.563 Khz Sinus (row 14 / after FFT / Z. 14)	cos φ = 0.63	φ = 51° (deg)
Time until first 11 kHz wave - at 96 kHz (row 10-16 / Zeile 10-16)	28 Samples	1:9628*	291.7 ns
Degree of correlation L/R > 11 kHz (row 10 / Korrelationsgrad, Zeile 10)	cos φ = 0.61	φ = 52° (deg)
Degree of correlation L/R = 9.563 kHz Sinus (row 12 / Zeile 12)	cos φ = 0.63	φ = 51° (deg)
Time until first 11 kHz wave - at 192 kHz (row 10-16 / Zeile 10-16)	55 Samples	1:19255*	286.5 ns
Time difference at 11 kHz wave between 44.1 kHz and 192 kHz		294.8-286.5	8 ns
Phase difference at 11 kHz between 44.1 kHz and 192 kHz	1:11:0.008	a tenth of a period
Phase difference at 11 kHz between 44.1 kHz and 192 kHz	360110.008	33° (deg)

Please note: One time the FFT filtering has been done after sample rate conversion (row 10 and 12, downloads), one time the sample rate conversion after the FFT filtering (row 11, 14 and 15). First proceeding results especially for the stereo channel at 44.1 kHz more in a phase shift in direction of mono, compared with the original source in 192 kHz, but doesn't make a significant difference in the phase offset between the attacks in the same sample rate, measured at the left reference channel: ~ 295 ns at 44.1 kHz and ~ 292 ns at 96 kHz in both cases (row 10 and 11).

The results have been normalized to 0 dBFS before phase analysis, hence the levels e.g. in row 12 and 14 have been amplified by + 15 dB (compared with the original level in row 19).

Bitte beachten Sie: Einmal wurde die FFT Filterung nach der Abtastratenkonvertierung durchgeführt (Zeilen 10 und 12, Downloads), einmal die Abtastratenkonvertierung nach der FFT-Filterung (Zeilen 11, 14 und 15). Ersterer Vorgang zieht insbesondere für den Stereokanal in 44,1 kHz eine höhere Phasenverschiebung in Richtung Mono nach sich, verglichen mit der Originalquelle in 192 kHz, bringt jedoch keinen nennenswerten Unterschied im Phasenversatz der Attacks in gleicher Abtastrate, gemessen am linken Referenzkanal: Jeweils ~ 295 ns bei 44.1 kHz und ~ 292 ns bei 96 kHz (Zeilen 10 und 11).

Die Ergebnisse wurden vor der Phasenanalyse auf 0 dBFS normalisiert, von daher die Pegel beispielsweise in Zeile 12 und 14 um + 15 dB angehoben wurden (im Vergleich zum Originalpegel in Zeile 19).


Spectral and spatial phase analysis - comparison Spektrale und räumliche Phasenanalyse - Vergleich
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	44.1 kHz	96 kHz	192 kHz
1
	Runtime Delay 44.1 kHz	Runtime Delay 96 kHz	Runtime Delay 192 kHz
2
	Spectral Analysis 44.1 kHz	Spectral Analysis 96 kHz	Spectral Analysis 192 kHz
3
	Frequency Analysis 44.1 kHz 32 bit	Frequency Analysis 96 kHz 32 bit	Frequency Analysis 192 kHz 32 bit
4
	Analysis FFT > 10 kHz / 44.1 kHz 32 bit	Analysis FFT > 10 kHz / 96 kHz 32 bit	Analysis FFT > 10 kHz / 192kHz 32 bit
5
	Analysis FFT > 10 kHz / 44.1 kHz 32 bit - B	Analysis FFT > 10 kHz / 96 kHz 32 bit - B	Analysis FFT > 10 kHz / 192kHz 32 bit - B
6
	Noise floor 44.1 kHz 16 bit	Noise floor 96 kHz 16 bit	Noise floor 192 kHz 16 bit
7
	Noise floor 44.1 kHz 24 bit	Noise floor 96 kHz 24 bit	Noise floor 192 kHz 24 bit
8
	Noise floor 44.1 kHz 32 bit	Noise floor 96 kHz 32 bit	Noise floor 192 kHz 32 bit
9
	Frequency Analysis Attack 44.1 kHz 32 bit	Frequency Analysis Attack 96 kHz 32 bit	Frequency Analysis Attack 192 kHz 32 bit
10
	Phase Analysis FFT > 11 kHz / 44.1 kHz 32 bit	Phase Analysis FFT > 11 kHz / 96 kHz 32 bit	Phase Analysis FFT > 11 kHz / 192 kHz 32 bit
11
	Phase Analysis FFT - FFT first / 44.1 kHz 32 bit	Phase Analysis FFT - FFT first / 96 kHz 32 bit
12
	Phase Analysis FFT = 8.829 kHz / 44.1 kHz 32 bit L	Phase Analysis FFT = 9.563 kHz / 96 kHz 32 bit	Phase Analysis FFT = 9.563 kHz / 192 kHz 32 bit
13
	Phase Analysis FFT = 8.829 kHz / 44.1 kHz 32 bit R
14
	Phase Analysis FFT - FFT first / 44.1 kHz 32 bit L	Phase Analysis FFT - FFT first / 96 kHz 32 bit
15
	Phase Analysis FFT - FFT first / 44.1 kHz 32 bit R
16
	Time Delay Attack FFT > 10 kHz / 44.1 kHz 32 bit	Time Delay Attack FFT > 10 kHz / 96 kHz 32 bit	Time Delay Attack FFT > 10 kHz / 192 kHz 32 bit
17
	Quantisation Errors 44.1 kHz 16 bit	Quantisation Errors 96 kHz 16 bit	Quantisation Errors 192 kHz 16 bit
18
	Quantisation Errors 44.1 kHz 24 bit	Quantisation Errors 96 kHz 24 bit	Quantisation Errors 192 kHz 24 bit
19
	Quantisation Errors 44.1 kHz 32 bit	Quantisation Errors 96 kHz 32 bit	Quantisation Errors 192 kHz 32 bit
20
	Attack 44.1 kHz	Attack 96 kHz	Attack 192 kHz
	WAV-Files	WAV-Files	WAV-Files
	CD Audio 44.1 kHz 16 bit	High Resolution Audio 96 kHz 16 bit	High Resolution Audio 192 kHz 16 bit
	CD Audio 44.1 kHz 24 bit	High Resolution Audio 96 kHz 24 bit	High Resolution Audio 192 kHz 24 bit
	CD Audio 44.1 kHz 32 bit	High Resolution Audio 96 kHz 32 bit	High Resolution Audio 192 kHz 32 bit
	CD Audio FFT > 10kHz / 44.1 kHz 32 bit	HiRes FFT > 10kHz / 96 kHz 32 bit	HiRes FFT > 10kHz / 192 kHz 32 bit
	Please note, that High Resolution Audio requires a high quality digital/analogue conversion. Onboard soundcards are not capable to play files with 32 bit dynamical resolution, which get down converted during playback. Please take care, that your system is set to 192 kHz. Bitte beachten Sie, daß High Resolution Audio eine hochwertige Digital/Analogwandlung voraussetzt. Onboard Soundkarten sind nicht in der Lage, Dateien mit 32 bit dynamischer Auflösung wiederzugeben, welche dann während der Wiedergabe herunter konvertiert werden. Bitte stellen Sie sicher, daß Ihr System auf 192 kHz eingestellt ist.