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Recommended Book
Principles of Digital Audio
By Ken C Pohlmann
McGraw-Hill/TAB Electronics
Price: $22.04

Home » Audio
Audio Codec Comparison Table
Author: Gabriel Torres
Type: Tutorials Last Updated: February 5, 2008
Page: 3 of 5
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C-Media (CMI)

C-Media used to be very popular especially on low-end motherboards and they manufactured both codecs and complete audio controllers. Audio controllers usually need an external codec to do the analog-to-digital and digital-to-analog conversions, but C-Media’s low-end audio controllers have a codec embedded inside the chip and that is why we will include them on the table below. Because of that we included a column called “type” to let you known if the chip is just a codec requiring an external controller (e.g. connected the south bridge chip) or if it is a complete controller with an embedded codec (usually connected to the PCI bus). Chips from C-Media use names starting with the letters “CMI”, as you can see on the example shown on Figure 3.

C-Media CMI9739A codec
click to enlarge
Figure 3: C-Media CMI9739A codec.

Model

Type

Channels

Input Resolution

Output Resolution

Input  Max. Sampling Rate

Output Max. Sampling Rate

Input SNR

Output SNR

CMI8738/PCI-6CH

Controller

5.1

16-bit

16-bit

48 KHz

48 KHz

80 dB

80 dB

CMI8738/PCI-SX

Controller

4

16-bit

16-bit

48 KHz

48 KHz

80 dB

80 dB

CMI8768

Controller

7.1

16-bit

24-bit

48 KHz

96 KHz

86 dB

101 dB

CMI9738

Codec

4

20-bit

20-bit

48 KHz

48 KHz

72 dB

82 dB

CMI9739

Codec

5.1

20-bit

20-bit

48 KHz

48 KHz

CMI9761

Codec

5.1

20-bit

24-bit

48 KHz

96 KHz

90 dB

92 dB

Pages (5): « 1 2 [3] 4 5 »
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