Social media buttons

AC'97 Audio Codec

  • 6.7
  • Not bad
  • 669
  • 8
  • Very good
  • Very good
Your rating:
Your rating
  1. 0
  • Windows 98
  • Windows 98 SE
  • Windows ME
  • Windows 2000
  • Windows NT
  • Windows XP
  • Windows 2003
Latest version:
A4.06 11/05/11
Last month's downloads:
17.9 MB

AC'97 Audio Codec is fully compatible with:

  • Windows 98
  • Windows 98 SE
  • Windows ME
  • Windows 2000
  • Windows NT
  • Windows XP
  • Windows 2003
AC'97 Audio Codec is also compatible with

Report software

Thanks for your collaboration!

Oops, something's gone wrong. Try again.

*Required fields


Available languages

  • English


A good 6 channel audio codec for PC

Niamh Lynch

  • Comprehensive solution
  • No user interface

The ALC650 is an 18-bit, full duplex AC'97 2.2 compatible stereo audio CODEC designed for PC multimedia systems, including host/soft audio and AMR/CNR based designs. The ALC650 incorporates proprietary converter technology to achieve a high SNR, greater than 90 dB. The ALC650 AC'97 CODEC supports multiple CODEC extensions with independent variable sampling rates and built-in 3D effects.

The ALC650 CODEC provides two pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs. The digital interface circuitry of the ALC650 CODEC operates from a 5V/3.3V power supply with EAPD (External Amplifier Power Down) control for use in notebook and PC applications.

The ALC650 integrates a 50mW/20ohm headset audio amplifier into the CODEC, which can save BOM costs. The ALC650 also supports an AC'97 2.2 compliant SPDIF out function which allows easy connection from the PC to consumer electronic products, such as AC3 decoder/speaker and mini disk.

The ALC650 CODEC supports host/soft audio from Intel 810/815/820/845 chipsets as well as audio controller based VIA/SIS/ALI chipsets. Bundled Windows series drivers (Win95/98/ME/2000/XP/NT) and sound effect utilities (supporting Karaoke, emulation of 26 sound environments, and 5-band equalizer) provide a more comprehensive entertainment package for PC users. Finally, internal PLL circuits generate required timing signals, eliminating the need for external clocking devices.


  • High-performance CODEC with high S/N ratio (>90 dB)
  • 18-bit ADC and 20-bit DAC resolution
  • Compliant with AC'97 2.2 specifications
  • 18-bit stereo full-duplex CODEC with independent and variable sampling rate
  • 4 analog line-level stereo inputs with 5-bit volume control: LINE_IN, CD, VIDEO, AUX
  • 2 analog line-level mono inputs: PC_BEEP, PHONE_IN
  • Mono output with 5-bit volume control
  • Stereo output with 5-bit volume control
  • 6 channel slot selectable DAC output for multi-channel applications
  • 2 MIC inputs, which are software selectable
  • Power management capabilities
  • 3D Stereo enhancement
  • Embedded 50mW/20ohm OP at front LINE output
  • External amplifier power down capability
  • Digital S/PDIF output
  • Digital S/PDIF input (ALC650 Rev. E or later)
  • No external crystal/clock required
  • Supports 1 general purpose I/O pin
  • Power supply: digital: 3.3V; analog: 5V/3.3V
  • Standard 48-pin LQFP package

"crashed the computer (XP)"

Windows warned me against it but I went ahead anyway and the computer crashed. Tried it twice like an idiot and had to go through checkdisk in full.

Was this review useful?

23 May 2012

What do you think about AC'97 Audio Codec?

Your avatar
All opinions
Free Download AC'97 Audio Codec

Top Downloads: Audio codecs

  • United States
  • Global
  1. A good 6 channel audio codec for PC

Articles AC'97 Audio Codec

Questions and answers AC'97 Audio Codec

More Ask

AC'97 Audio Codec

Discover alternatives to and add-ons for AC'97 Audio Codec

Alternatives to AC'97 Audio Codec

AC'97 Audio Codec AC'97 Audio Codec

  • 8
  • 8
  • 6.7
  • 6.7

Addons for AC'97 Audio Codec

  • AC'97 Audio Codec doesn’t have any addons yet. Would you recommend any to us? Tell us