New Product - Premium Audio -


AK4137: Next Generation Premium SRC is now on the market.

[Product Name]



High Performance & Function 32-bit Premium Sampling Rate Converter
DR=186dB, Sampling Rate 8kHz ~768kHz
Support DoP, DSD Rate Conversion, DSD to PCM and PCM to DSD Conversion


AV Receivers, CD/SACD Players, Network Audio, USB DACs, USB Headphones, Sound Plate/Bars, Audio Interfaces, Professional Audio Mixers and other SRC instruments

Premium Audio Devices Audio 4 Pro


The AK4137EQ is a new flagship premium 32-bit SRC (Sampling Rate Converter), based on AKM’s VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies. 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 768 kHz PCM and DSD/PCM format conversion while supporting DoP format, suitable for high-resolution audio source playback.

● Dynamic sound playback with large amount of playback information
- AKMs VELVET SOUND architecture is utilized.
- Low-distortion technology achieves industry’s best performance of -150dB as an SRC with 186dB 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 768 kHz PCM and 12.288 MHz DSD (Direct Stream Digital), 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
Six patterns of sampling rate conversion format are available such as PCM → PCM, DSD → DSD, DSD → PCM, PCM → DS, DoP → DSD and DoP → PCM.

● DR:
● THD+N: -150dB
● Sampling Rate: 8kHz ~ 768kHz
● SRC Conversion Format:
● Digital Filters: 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: -40~85℃
● Package: 48-pin LQFP, 5 x 5 mm

To obtain more information about the AK4137, please visit here.


Global Web Distributor Digi-Key Distributors/ Representatives

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.