PC AV Tech Sound Card Report: Baseline

Baseline-Test Limits

(24 graphics-you may have to wait to load them all!)

Summary
Parameter	My Opinion	Operational Mode (Signal looped back)
		Analog Signal Interface		Digital Signal Interface
		16 Bit Program Data	24 Bit Program Data	16 Bit Program Data	24 Bit Program Data
Frequency Response	Reference	30-20kHz +0.08, -0.03 dB	Unstable	30-20kHz +0.001/- 0.001 dB	Unstable
1 kHz Total Harmonic Distortion	Reference	0.00218% @ -0.0 dB	0.0005% @ -0.0 dB	0.00083% @ -0.3 dB	0.00000% @ 0 dB
20 Hz Total Harmonic Distortion	Reference	0.005% @ -0.4 dB	0.005% @ -0.4 dB	0.0013% @ 0.0 dB	0.00065% @ 0.0 dB
Signal to Noise Ratio	Reference	88 dB	95 dB	92dB	138 dB
19 & 20 kHz Intermodulation Distortion	Reference	0.0032% @ -1.5 dB	0.0032% @ -1.5 dB	0.007% @-1.5 dB	0.0000% @-1.5 dB
Dynamic Range	Reference	90 dB	96 dB	92 dB	144 dB
Jitter Distortion	Reference	-100 dB	-112 dB	-100 dB	-160 dB
Software Used:	Windows 98 build 1998 Driver Release: 4.0.0, Spectra Lab Release 4.32.14, Questionable DSP chip in Layla PCI interface.

TeDis

Discussion Of Results

These represent the best measurements that I can reasonably expect with my test setup. It is possible that some units I test will show better performance than this if they have distortion that compensates for distortion in my test setup. I've seen this happen with some of the distortion measurements with certain other excellent cards.

This particular test setup has an early-production Layla PCI card that is considered by some to have a flawed DSP chip. I am working with Event to get this corrected, but they are very slow to react to my EMail questions.

Baseline Sound Card 16 Bit Analog Frequency response (Loop Back)

Baseline Sound Card 16 Bit Analog Frequency response (Loop Back)

Baseline Sound Card 16 Bit Analog 1 kHz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Analog 1 kHz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Analog 20 Hz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Analog 20 Hz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Analog Residual Noise - Dynamic Range (Loop Back)

Baseline Sound Card 16 Bit Analog Residual Noise - Dynamic Range (Loop Back)

Baseline Sound Card 16 Bit Analog IM Distortion (Loop Back)

Baseline Sound Card 16 Bit Analog IM Distortion; (Loop Back) /strong>

Baseline Sound Card 16 Bit Analog FM Distortion - "Jitter" (Loop Back)

Baseline Sound Card 16 Bit Analog FM Distortion - "Jitter" (Loop Back)

End of Baseline Sound Card 16 Bit Analog Charts (Loop Back)

Baseline Sound Card 24 Bit Analog Frequency Response, (Loop Back)*

Baseline Sound Card 24 Bit Analog Frequency Response (Loop Back)

Baseline Sound Card 1 KHz 24 Bit Analog Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 1 KHz 24 Bit Analog Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 20 Hz 24 Bit Analog Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 20Hz 24 Bit Analog Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 24 Bit Analog Dyamic Range (Loop Back)l

Baseline Sound Card 24 Bit Analog Dynamic Range, (Loop Back)

Baseline Sound Card 24 Bit Analog Intermodulation, (Loop Back)l

Baseline Sound Card 24 Bit Analog Intermodulation, (Loop Back)

Baseline 24 Bit Analog Sound Card Jitter, (Loop Back)

Baseline 24 Bit Analog Sound Card Jitter, (Loop Back)

End of Baseline Sound Card 24 Bit Analog Charts (Loop Back)

Baseline Sound Card 16 Bit Digital Frequency response (Loop Back)

Baseline Sound Card 16 Bit Digital Frequency response (Loop Back)

Baseline Sound Card 16 Bit Digital 1 kHz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Digital 1 kHz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Digital 20 Hz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Digital 20 Hz Total Harmonic Distortion and Noise (Loop Back)

Baseline Sound Card 16 Bit Digital Residual Noise - Dynamic Range (Loop Back)

Baseline Sound Card 16 Bit Digital Residual Noise - Dynamic Range (Loop Back)

Baseline Sound Card 16 Bit Digital IM Distortion (Loop Back)

Baseline Sound Card 16 Bit Digital IM Distortion; (Loop Back) /strong>

Baseline Sound Card 16 Bit Digital FM Distortion - "Jitter" (Loop Back)

Baseline Sound Card 16 Bit Digital FM Distortion - "Jitter" (Loop Back)

End of Baseline Sound Card 16 Bit Digital Charts (Loop Back)

Baseline Sound Card 24 Bit Digital Frequency Response, (Loop Back)

Baseline Sound Card 24 Bit Digital Frequency Response (Loop Back)

Baseline Sound Card 1 kHz 24 Bit Digital Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 1 KHz 24 Bit Digital Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 20 Hz 24 Bit Digital Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 20 Hz 24 Bit Digital Total Harmonic Distortion and Noise, (Loop Back)

Baseline Sound Card 24 Bit Digital Dyamic Range (Loop Back)l

Baseline Sound Card 24 Bit Digital Dynamic Range, (Loop Back)

Baseline Sound Card 24 Bit Digital Intermodulation, (Loop Back)l

Baseline Sound Card 24 Bit Digital Intermodulation, (Loop Back)

Baseline 24 Bit Digital Sound Card Jitter, (Loop Back)

Baseline 24 Bit Digital Sound Card Jitter, (Loop Back)

End of Baseline Sound Card 24 Bit Digital Charts (Loop Back)

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This Page Last Revised 11/24/98 (abk)