General Description

The ALC898 is a multi-channel High Definition Audio Codec with Realtek proprietary loss-less content protection technology that protects pre-recorded content while still allowing full-rate audio enjoyment from DVD audio, Blu-ray DVD, or HD DVD discs.

The ALC898 provides ten DAC channels that simultaneously support 7.1 sound playback, plus 2 channels of independent stereo sound output (multiple streaming) through the front panel stereo outputs. Two stereo ADCs and one stereo digital microphone converter are integrated and can support a microphone array with Acoustic Echo Cancellation (AEC), Beam Forming (BF), and Noise Suppression (NS) technologies. The ALC898 incorporates Realtek proprietary converter technology to achieve 110dB Signal-to-Noise ratio (SNR) playback (DAC) quality and 104dB SNR recording (ADC) quality, and is designed for Windows Vista premium desktop and laptop systems.

All analog I/O are input and output capable, and headphone amplifiers are also integrated at eight analog output ports (port-A to port-H). All analog I/Os can be re-tasked according to user’s definitions.

Support for 16/20/24-bit S/PDIF input and output with up to 192kHz sample rate offers easy connection of PCs to consumer electronic products such as digital decoders and speakers. The ALC898 features secondary S/PDIF-OUT output and converter that transport digital audio output to a High Definition Media Interface (HDMI) transmitter. 

The ALC898 supports host audio from the Intel chipsets, and also from any other HDA compatible audio controller. With various software utilities like environment sound emulation, multiple-band and independent software equalizer, dynamic range compressor and expander, optional Dolby PCEE program, SRS TruSurround HD, SRS Premium Sound, Fortemedia SAM, Creative Host Audio, Synopsys Sonic Focus, DTS Surround Sensation | UltraPC, and DTS Connect licenses, the ALC898 offers the highest sound quality, providing an excellent entertainment package and game experience for PC users.


Hardware Features

  • High performance DACs with 110dB signal-to-noise ratio (A-weighting)
  • High performance ADCs with 104dB signal-to-noise ratio (A-weighting)
  • Meets Microsoft WLP3.x (Windows Logo Program) audio requirements
  • Ten DAC channels support 16/20/24-bit PCM format for 7.1 sound playback, plus 2 channels of concurrent independent stereo sound output (multiple streaming) through the front panel output
  • Three stereo ADCs support 16/20/24-bit PCM format, multiple stereo recording
  • All DACs support 44.1k/48k/88.2k/96k/192kHz sample rate
  • All ADCs support 44.1k/48k/88.2k/96k/192kHz sample rate
  • Primary 16/20/24-bit S/PDIF-OUT supports 32k/44.1k/48k/88.2k/96k/192kHz sample rate
  • Secondary 16/20/24-bit S/PDIF-OUT supports 32k/44.1k/48k/88.2k/96k/192kHz sample rate
  • 16/20/24-bit S/PDIF-IN supports 32k/44.1k/48k/96k/192kHz sample rate
  • All analog jacks (port-A to port-H) are stereo input and output re-tasking
  • Port-A/B/C/D/E/F/G/H built-in headphone amplifiers
  • Port-B/C/E/F with software selectable boost gain (+10/+20/+30dB) for analog microphone input
  • High-quality analog differential CD input
  • Supports external PCBEEP input and built-in digital BEEP generator
  • Software selectable 2.5V/3.2V/4.0V VREFOUT
  • Up to four channels of microphone array input are supported for AEC/BF application
  • Two jack detection pins each designed to detect up to four jacks
  • Supports analog GPIO2 to be jack detection for CD input, which is used as 9th analog port
  • Supports legacy analog mixer architecture
  • Up to three GPIOs (General Purpose Input and Output) for customized applications. GPIO0 and GPIO1 share pin with DMIC-CLK/SPDIF-OUT2 and DMIC-DATA.
  • Supports mono and stereo digital microphone interface (pins shared with GPIO0 and GPIO1)
  • Supports anti-pop mode when analog power LDO-IN is on and digital power is off
  • Built-in analog LDO
  • Content Protection for Full Rate loss-less DVD Audio, Blu-ray DVD and HD-DVD audio content playback (with selected versions of WinDVD/PowerDVD/TMT)
  • Hardware Zero-Detect output volume control
  • 0.75dB per step output volume and input volume control
  • Supports 3.3V digital core power, 1.5V or 3.3V digital I/O power for HD Audio link, and 5.0V analog power
  • Intel low power ECR compatible, and power status control for each analog/digital converter and pin widget
  • 48-pin LQFP Green package

Software Features

  • Meets Microsoft WLP 3.x and future WLP audio requirements
  • WaveRT-based audio function driver for Windows Vista and Windows 7
  • Direct Sound 3D™ compatible
  • I3DL2 compatible
  • 7.1+2 channel multi-streaming enables concurrent gaming/VoIP
  • Emulation of 26 sound environments to enhance gaming experience
  • Multiband software equalizer and tools provided
  • Voice Cancellation and Key Shifting effect
  • Dynamic range control (expander, compressor, and limiter) with adjustable parameters
  • Intuitive Configuration Panel (Realtek Audio Manager) to enhance user experience
  • Microphone Acoustic Echo Cancellation (AEC), Noise Suppression (NS), and Beam Forming (BF) technology for voice applications
  • Smart multiple streaming operation
  • Optional Dolby PCEE program, SRS TruSurround HD, SRS Premium Sound, Fortemedia SAM, Creative Host Audio, Synopsys Sonic Focus, DTS Surround Sensation | UltraPC, and DTS Connect licenses


  • Desktop multimedia PCs
  • Notebook PCs