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Event Darla Test Performance

Summary
Parameter	My Opinion	Mode of Operation
		Reference 16 Bit Digital Loop Back	Analog Loop Back (16 bit)	Analog Loop Back (24 bit)
Frequency Response	PCAVTech Reference	<0.001 dB 36-20kHz	+0.08, -0.06 dB, 36-20kHz	+0.08, -0.06 dB 36-20 kHz
1 kHz Total Harmonic Distortion	PCAVTech Reference	<0.001%	<0.0018%	0.0014%
Signal to Noise Ratio	PCAVTech Reference	91.6 dB	89.3 dB	94 dB
19 & 20 kHz Intermodulation Distortion	PCAVTech Reference	0.005%	<0.0033%	0.0033%
Dynamic Range	PCAVTech Reference	91 dB	90.3 dB	96 dB
Jitter Distortion	PCAVTech Reference	-120 dB	<-115 dB	<-125 dB
Software Used:	Windows95 950B; Driver Release: 2.0.4

 

The Event Darla card has the identical analog circuitry to Gina, but uses a different means to terminate the analog connections. Its performance should be very similar. Gina results are shown here. Since Gina is the current "Reference" card for the tests on this site, all Analog/Digital test results that could be obtained would be the same as those shown above, for analog loop-back operation.

These results were obtained by looping back the software and equipment used. All tests were performed as close to digital full scale (FS) as possible.

The PC system used for these tests was a 32 meg P5-200 built on a Asus TP97XE motherboard sitting on a wooden test jig with no case. Other cards in the machine included a Turtle Beach Fiji, and Intel 100BTX network card, and a S3 Virge chipset video card. Some other motherboards are known to provide poorer numbers for noise in the analog tests.

The analog tests were done by looping the 3-4 outputs of the Darla to its 1-2 inputs, using a fabricated approx. 6" TRS jumper cable.

The nonlinear distortion of the Darla card can be substantially improved over these numbers by choosing slightly lower operating levels. Tests performed on other cards using Darla may show substantially worse figures for noise, because the Darla lacks balanced I/O.

Baseline Frequency response (16 bit Digital Loop Back)

Baseline Frequency response (16 Bit Digital Loop Back)

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

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

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

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

Baseline IM Distortion - (16 Bit Digital Loop Back)

Baseline IM Distortion; (16 Bit Digital Loop Back)

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

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

Darla Frequency Response, 16 Bit Analog Loop Back

Darla Frequency Response, 16 Bit Analog Loop Back

Darla Total Harmonic Distortion and Noise, 16 Bit Analog Loop Back

Darla Total Harmonic Distortion and Noise, 16 Bit Analog Loop Back

Darla Intermodulation, 16 Bit Analog Loop Back

Darla Intermodulation, 16 Bit Analog Loop Back

Darla Residual Noise - (Dynamic Range), 16 Bit Analog Loop Back

Darla Residual Noise - (Dynamic Range), 16 Bit Analog Loop Back

Darla Jitter, 16 Bit Analog Loop Back

Darla Jitter, 16 Bit Analog Loop Back

Darla Frequency Response, 24 Bit Analog Loop Back

Darla Frequency Response, 24 bit Analog Loop Back

Darla Total Harmonic Distortion and Noise, 24 bit Analog Loop Back

Darla Total Harmonic Distortion and Noise, 24 bit Analog Loop Back

Darla Intermodulation, 24 bit Analog Loop Back

Darla Intermodulation, 24 bit Analog Loop Back

Darla Residual Noise - (Dynamic Range), 24 bit Analog Loop Back

Darla Residual Noise - (Dynamic Range), 24 bit Analog Loop Back

Darla Jitter, Reference Card (Gina) 24 bit Analog Loop Back

Darla Jitter, Reference Card (Gina) 24 bit Analog Loop Back