RightMark Audio Analyzer test report

Testing device	Gigaworks modified
Sampling mode	24-bit, 44 kHz
Interface
Testing chain	External loopback (line-out – line-in)
RMAA Version	6.1.2
20 Hz – 20 kHz filter	ON
Normalize amplitude	ON
Level change	-1.1 dB / -1.2 dB
Mono mode	OFF
Calibration singal, Hz	1000
Polarity	correct/correct

Modifications: Removed second opamp. Removed L+,L-,R+,R- input caps. Removed filter caps around opamp, C1, C2, C3 C4, C6. R13 and R14 lifted to get signal out directly to RCA. Check DC offset before plugging in. The mod is temporary, will test with Cirrus Logic’s low-pass filter example later on…

Summary

Frequency response (from 40 Hz to 15 kHz), dB	+0.07, -0.60	Good
Noise level, dB (A)	-109.9	Excellent
Dynamic range, dB (A)	109.8	Excellent
THD, %	0.0008	Excellent
THD + Noise, dB (A)	-96.2	Excellent
IMD + Noise, %	0.0020	Excellent
Stereo crosstalk, dB	-108.7	Excellent
IMD at 10 kHz, %	0.0021	Excellent
General performance		Excellent

Frequency response

From 20 Hz to 20 kHz, dB	-1.07, +0.07
From 40 Hz to 15 kHz, dB	-0.60, +0.07

Noise level

	Left	Right
RMS power, dB	-104.9	-105.6
RMS power (A-weighted), dB	-109.6	-110.2
Peak level, dB FS	-87.4	-87.5
DC offset, %	+0.0	+0.0

Dynamic range

	Left	Right
Dynamic range, dB	+104.9	+105.8
Dynamic range (A-weighted), dB	+109.5	+110.2
DC offset, %	+0.00	+0.00

THD + Noise (at -3 dB FS)

	Left	Right
THD, %	+0.0008	+0.0008
THD + Noise, %	+0.0016	+0.0016
THD + Noise (A-weighted), %	+0.0015	+0.0016

Intermodulation distortion

	Left	Right
IMD + Noise, %	+0.0021	+0.0020
IMD + Noise (A-weighted), %	+0.0014	+0.0014

Stereo crosstalk

	Left	Right
Crosstalk at 100 Hz, dB	-108	-105
Crosstalk at 1000 Hz, dB	-107	-109
Crosstalk at 10000 Hz, dB	-93	-101

IMD (swept tones)

	Left	Right
IMD + Noise at 5000 Hz,	0.0020	0.0021
IMD + Noise at 10000 Hz,	0.0020	0.0021
IMD + Noise at 15000 Hz,	0.0020	0.0021