TeDis
Discussion Of Results
The only solid bright spot in this card's performance is for the digital output, which is not too bad other than a noticable frequency response roll-off above 5 KHz.
It was not possible to input a SP/DIF signal (1 volt p-p) via the SP/DIF digital input, but both digital inputs worked well with a the TTL-level digital output of a Creative Labs 32x CD player.
The digital input must be enabled via the Windows Recording Mixer's special feature control. Once enabled, an actively clocked digital signal must be present when you start to record, or there will be an error message. The digital I/O is not affected by level controls.
It should be noted that hooking a digital signal to either digital input precludes use of the other digital input. The digital I/O supported only 44 KHz 16 bit Stereo operation.
The analog Dynamic Range level figures show considerable nonlinearity and error at low levels.
Despite its poor analog performance, this card is an overall improvement over its predecessor, the CMI 8330, mainly because of the performance of its digital input and output.
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency response (Full Duplex - Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency response (Full Duplex - Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 kHz Total Harmonic Distortion and Noise (Full Duplex -Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 kHz Total Harmonic Distortion and Noise (Full Duplex -Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise (Full Duplex -Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise (Full Duplex -Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range) (Full Duplex - Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range) (Full Duplex - Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) (Full Duplex - Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) (Full Duplex - Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card IM Distortion (Full Duplex - Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card IM Distortion; (Full Duplex - Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card FM Distortion - "Jitter" (Full Duplex - Loop Back) |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card FM Distortion - "Jitter" (Full Duplex - Loop Back) |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Analog to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Analog to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise Analog Input to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise Analog Input to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 KHz Total Harmonic Distortion and Noise, Analog to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Total Harmonic Distortion and Noise, Analog to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Analog to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Analog to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Analog to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Analog to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Analog to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Analog to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Analog to Digital |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Analog to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Digital to Analog |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 KHz Total Harmonic Distortion and Noise, Digital to Analog |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 K HzTotal Harmonic Distortion and Noise, Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise, Digital to Analog |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise, Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Digital to Analog |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Digital to Analog |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Digital to Analog |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Digital Data to Analog Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Digital to Analog |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Digital Data to Digital Output |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 KHz Total Harmonic Distortion and Noise, Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 K HzTotal Harmonic Distortion and Noise, Digital Data to Digital Output |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise, Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise, Digital to Digital |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Digital Data to Digital Output |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Digital Data to Digital Output |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Digital Data to Digital Output |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Digital Data to Digital Output |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Digital Data to Digital Output |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Frequency Response, Digital Input to Digital Data |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 KHz Total Harmonic Distortion and Noise, Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 1 K HzTotal Harmonic Distortion and Noise, Digital Input to Digital Data |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise, Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card 20 Hz Total Harmonic Distortion and Noise, Digital Input to Digital Data |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Intermodulation, Digital Input to Digital Data |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Dynamic Range), Digital Input to Digital Data |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Residual Noise - (Data = Silence) Digital Input to Digital Data |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Digital Input to Digital Data |
 |
| CMI 8338 Chip on PC Chips 599 Motherboard Sound Card Jitter, Digital Input to Digital Data |
| PC AV Tech |
| Send questions or comments on the PC AV Tech Soundcard Test webpages to Arny Krueger |
| Website Art Direction by David
Carlstrom Technical Tests and Report Design by Arny Krueger |
| All material on this
page is Arny Krueger's personal opinion, provided for
entertainment purposes only. See web site disclaimer for details (c) 1998, Arnold B. Krueger. All rights reserved. |
| Please let The
Webmaster know of any
problems you encounter on this website. This Page Last Revised 4/11/99 (abk) |