This post explains for the Audio Codec.

The part number is ALC887, ALC887-GR.

The Package is LQFP-48 Type.

The function of this semiconductor is 7.1 Channel High Definition Audio Codec.

Manufacturer: Realtek Microelectronics

Preview images :

Description

The ALC887 is a 7.1 Channel High Definition Audio Codec with two independent SPDIF outputs. Featuring eight channels of DAC support 7.1 sound playback, and integrates two stereo ADC that can support a stereo microphone, and feature Acoustic Echo Cancellation (AEC), Beam Forming (BF), and Noise Suppression (NS) for voice applications.

A 7.1 channel high-definition audio codec is a type of audio processing chip that supports 7.1 channel surround sound in high-definition audio systems. It is commonly used in home theater systems, gaming consoles, and multimedia devices to provide immersive audio experiences.

ALC887 is designed not only to meet the premium audio performance requirements in current WLP3.10
(Windows Logo Program), but provides better characteristics for future WLP. That brings user real high
fidelity of sound quality.

Pinouts:

Features

1. Meets premium audio requirements for Microsoft WLP 3.10

2. Meets stricter performance requirements for future WLP

3. High-performance DACs with 97dB Signal-to-Noise Ratio (SNR), ADCs with 90dB SNR

4. Four stereo DACs (8 channels) support 16/20/24-bit PCM format for 7.1 sound playback.

5. Two stereo ADCs (4 channels) support 16/20/24-bit PCM format recording simultaneously

6. All DACs supports 16/20/24-bit, 44.1k/48k/96k/192kHz sample rate

7. All ADCs supports 16/20/24-btt, 44.1k/48k/96k/192kHz sample rate

8. Two independent SPDIF-OUT converters support 16/20/24-bit, 44.1k/48k/88.2k/96k/192kHz sample
rate. One converter for normal SPDIF output, the other outputs an independent digital stream to the
HDMI transmitter

 

ALC887 PDF Datasheet

Posts related to ‘ Audio Codec ‘

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ALC202	AC97 Audio CODEC
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ALC5616	Stereo Channel Audio CODEC
ALC5621	I2S Audio Codec – Realtek
ALC887	ALC887 PDF – 7.1 Channel High Definition Audio Codec
WM8778	24-bit, 192kHz, Stereo Audio CODEC
ALC221	ALC221 PDF – High Definition Audio Codec – Realtek
ALC272	4-Channel HD Audio Codec
CX20671	HD Audio Codec SoC – Conexant

 

Part Number: CD2399

Function: Surround Reverb sound processor ( Audio Reverb Circuit )

Package: DIP, SOP 16 Type

Manufacturer: Shenzhenshi Youngfukang Technology

Images:

Description

A surround reverb sound processor is a device or software module used to create a reverberation effect in multi-channel surround sound systems. It is designed to simulate the acoustic properties of different environments, such as concert halls, theaters, or studios, and apply the reverberation effect to audio signals.

CD2399 is a reverberation processing chip, which has digital-to-analog, analog-to-digital conversion function and high sampling frequency, and also has a built-in 44K memory. digital processing part delay. The system clock is generated by a built-in voltage-controlled oscillator, which is a major feature of digital processing circuits, which makes the frequency easy to adjust.

The advantage of device is that it has low distortion coefficient and noise (NO < − 90 dBV), so it can output high quality audio signal. In pursuit of simpler PCB layout and lower cost, the CD2399’s pinout and application circuit have been optimized.

Block Diagram and Pinouts:

Features

1. with automatic reset function

2. Low noise, typically VNO<−90dBV

3. Low distortion, THD＜1.0%

4. Externally adjustable VCO

 

Typical application :

1. Audio equipment with mixer processor

2. CD-R, car audio

3. Karaoke mixer

4. VCD, TV, electronic music equipment

 

CD2399 PDF Datasheet