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AKM releases Next Generation Premium Sampling Rate Converter: the AK4136 for Automotive Applications

  • Product Name

  • AK4136VQ
    (Product: Audio & Voice > Premium Audio > Premium SRCs)
  • Title

  • DR: 176dB  32-bit Sampling Rate Converter (SRC)
    Sampling Rate: 8 to 384kHz
  • Applications

  • AV Receivers, CD/SACD Players, Network Audio, USB DACs, USB Headphones, Sound Plate/Bars, Audio Interfaces, Professional Audio Mixers, SRC instruments and other car audio system 
    VELVET SOUND Premium Audio Devices


Asahi Kasei Microdevices Corporation (AKM) releases the AK4136VQ, a next generation premium sampling rate converter (SRC). The AK4136VQ is a new premium 32-bit SRC, based on AKM’s VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies.
The AK4136VQ achieves higher performance and better sound quality than a similar conventional product, enabling high-quality playback from high-resolution sound sources in car audio application. This technology realizes fine sound details with its ultra-low-distortion architecture in addition to 32-bit resolution digital filter processing. The digital input supports up to 384kHz format conversion.

● Dynamic sound playback with large amount of playback information

- AKMs VELVET SOUND architecture is utilized.
- Low-distortion technology achieves industry’s best performance of -140dB as an SRC with 176dB D/R (A-weighted) characteristic.
- IRD (Impulse Response Designed) filters are integrated with 32-bit processing to reproduces detailed natural sound.
- Four different digital filters types are selectable according to the user audio and system preferences.

● Supporting High Resolution Data

- The digital input supports up to 384kHz PCM, recreating high-resolution sound that is as close as possible to the original acoustic source.
- It is suitable for high-resolution sound source playback that is becoming popular with Network Audio and USB DACs.

● Sampling Rate Conversion

- The AK4136 supports a PCM to PCM format sampling rate conversion.


Premium Sampling Rate Converters

Number of Channel
DR (A-Weighted)
THD+N -140dB
Sampling Rate
8 to 384kHz
SRC Conversion Format
Sound Color
Four Types 32-bit, 8-fold Digital Filters
Soft Mute Available
Mute time can be set in semi-automatic mode
Internal Regulator 1.8V (only available when DVDD=3.3V)
Power Supply 1.8V or 3.3V
Operational Temperature Range -40 to 105°C
Package 48-pin LQFP  0.5mm pitch
>> To obtain more information, please visit here.
Premium SRC AK4136VQ


● Sampling Rate Converters

Product Name  AK4137EQ
 Pro/ Hi-end
 Audio SRC
 Mid to Hi-end
 Audio SRC
 AK4127VF/ 8AVQ/ 9VQ
 Mid to Hi-end
 Audio SRC
Number of Channel
2ch 2ch 2/ 8/ 6ch
32-bit 32-bit 24-bit
DR (A-weighted)
186dB 176dB 140dB
-150dB -140dB -130dB
8 to 768kHz 8 to 384kHz 8 to 216kHz
8 to 768kHz 8 to 384kHz 8 to 216kHz
I/O Ratio
1/6 to 24 1/6 to 12 1/6 to 6
Sound Color
Standard, Short, DSD Standard, Short Standard
Power Supply
DVDD: 3.0 to 3.6V
DVDD: 1.7 to 1.9V
DVDD: 3.0 to 3.6V
DVDD: 1.7 to 1.9V
AVDD/ DVDD: 3.0 to 3.6V
Operational Temperature Range
-40 to 105°C -40 to 105°C -40 to 85°C
Package 48-pin LQFP
(0.5mm pitch)
48-pin LQFP
(0.5mm pitch)
30-pin VQFP
(0.65mm pitch)

Distributors/ Representatives
WEB Distributor
WEB Distributor
WEB Distributor

VELVET SOUND is a brand concept of, “sound philosophy”, given to AKM’s new generation of audio devices and, “new architecture & core technologies”. A new circuit is designed to, “balance the amount of information and intensity”, and, “focus on the original sound”, to achieve rich musicality and high performance. This circuit contains specifications and features suitable for the high-resolution audio era.

About "Audio 4 Pro"
Audio 4 Pro™ products are designed for pro audio equipment, including mixing consoles, electronic musical instruments and sound effectors, meeting the highest sound quality standards of recording studios. Audio 4 Pro™ products range provides world-leading performance with high quality sound, winning trust within professional audio industry.

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 * Information on this page is current on the date of press release.
 * AKM, VELVET SOUND Logo™ and Audio 4 Pro™ are trademarks of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.