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ADAU1701 Audio Digital Signal Processor Kernel Board - APM2[658]

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In-Circuit Programmer for ADAU1701 Digital Signal - ICP1



Interface Extension Kit



WONDOM In-circuit Programmer with BLE Bluetooth for APP control - ICP3




APM2 (AA-AP23122) is a 2 x in, 4x out DSP kernel board based on high performance chip – ADAU1701. With the integrated DSP chip, APM2 can be applied to various DIY audio, commercial or industrial applications such as digital crossover, bass enhancement, loudspeakers, kiosk, etc. After connection with WONDOM programmer – ICP series, APM2 supports programming with SigmaStudio, remote control through APP or PC UI.

Miumax Download link for Android Phone: video link

Miumax Download link for iOS Phone: Please go to APP Store and search “Miumax” directly.

Demo Program for Reference: video link

Video for adding DSP to your audio systems: video link

Video for programming and APP Control of APM2 with ICP3: video link

Easy Connection and Quick Integration

APM2 comes with a necessary demonstration firmware, so you can use it in your audio systems directly with no need of programming. A 2 x in, 3 x out Interface extension board – APM3 is provided for easy audio connection, which offers multiple kinds of interfaces, including RCA jack, 3.5mm AUX IN jack and PH-4Pos line input connector. After connection with APM3, APM2 can be easily integrated into any projects, such as Kiosk, Speaker Equalization, Active Crossovers, Digital Car Audio System, Home Theater, Karaoke, Musical Instruments and so on. APM2 and APM3 are both in 2’’ x 2’’ compact size, making them simple to be installed in any cabinet without occupation of too much space to leave enough headroom for other components.

High Performance ADAU1701

The on board fully programmable 28-/56-bit audio DSP ADAU1701 from Analog device is competent in various signal processing applications. This process can compensate for real-world limitations of speakers, amplifiers, and listening environments, providing dramatic improvements in perceived audio quality.

Four potentiometers are provided on APM2 for real time hardware control of the whole audio system for volume, gain and cut-off frequency setting.

Supporting SigmaStudio Program and Remote Control

Different applications have unlike requirements on audio as the speakers, the environment and the preference are different. To give customers better control of audio systems, Sure Electronics has released In-circuit programmers (ICP series), with connection of which, you can program DSP with SigmaStudio or remote control the system with APP or PC UI.

We have developed an APP – Miumax for remote control, with which, you can adjust volume, gain, frequency and EQ setting. PC UI is also available for different applications as digital crossover, bass enhancement, subwoofer, and so on.

Sure Electronics has provided open-sourced files for customers to start the project quickly. Please refer to the in the “Download” part.

Package Includes

1pc AA-AP23122, ADAU1701 Kernel board

  • 28-/56-bit, 50 MIPS Digital Audio Processor
  • Fully Programmable with SigmaStudio Graphical tool
  • SNR of 100dB, THD + N of -83dB
  • Hardware Adjustable with 4 potentiometer on board
  • App Control Supported with WONDOM ICP3
  • Powered by 5V micro USB
  • 2 x 2 inches Compact PCB Size
  • Speaker Equalization
  • Active Crossovers
  • Digital Car Audio System
  • Home Theater
  • Karaoke
  • Musical Instruments
Miumax V2.0 has been released. Following are the download address. For Android: https://store.sure-electronics.com/images/documents/Miumax_APP_v1.0.1_2020.6.22.zip For iOS: Please go to APP Store and search 'Miumax' directly.Demo Program for Reference: https://store.sure-electronics.com/images/documents/APM2_SigmaStudio.zip 



16 Feb 2023

Hello, can APM2 board be configured to provide 1 input x 4 output for frequency dividing, and EQ/Volume settings for each of four channels? This is a mono audio application.

Hello, Peter. APM2 DSP kernel board is a 2-in, 4-out module. Each output channel can be configured independently. The default program in APM2 doesn't support the functions you mentioned. You need to customize the DSP program in the SigmaStudio to realize your ideas. Wish this could help you. Have a nice day~


07 Feb 2023

Hi, can you name the output sensitivity of the DACs?

Hello, Korbinian. Thank you for your interest in our products. The output level of DACs is 775mV. Wish this could help you. Have a nice day~


31 Jan 2023

Hi guys, my question is: the pin 10 of connector J1 (VIN) same as pin 1 of J4 (VIN) and can it be used for external power connect? Also, what is the voltage range that can be connected to this connector, connectors? Thanks the answer! Is it possible to know when the APM2 - ICP5 (Miumax for APM2) PC application will be available?

Hello, Lajos. Thank you for your interest in our products. The VIN pin of both J1 and J4 can be used for external power. The suggested voltage is DC5V. Wish this could help you. Have a nice day~


25 Nov 2022

HI, we are trying to used the APM2 without extension board. It seems the DAC pins work but the ADC pins are not working correctly.

Hi, Trylan. Please note that J2 connector is equipped with coupling capacitors, while J5 connector is not. We infer that you used the ADC of J5 connector. Please use ADC of J2 and have a try again. If there is still problem, please send some pictures or videos to us so that we can pinpoint the problem and solve it for you. Wish this could help you. Have a nice day~


16 Aug 2022

Hi do you have a correct link for Miumax V2.0 the only link for Miumax V2.0 (QR Code) is for V1.0.1_2020.6.22 Miumax V1.0??? "Various Applications and Required Documentation for WONDOM ADAU1701 DSP Products[370].pdf" Thanks Rupert

Hi, Rupert. Thank you for your interest in our products. Please kindly note that Miumax V1.0.1_2020.6.22 is the MiuMax V2.0 we are saying. You can download it for control. Wish this could help you. Have a nice day~


04 Jul 2022

Hello, Do you have any recommendation of a bluetooth 5 modules that would be easy to integrate with this board ? Thanks!

Hi, Guillaume. Thank you for your interest in our products. You can take a look at the BRB3v3 board. Here is the link for your reference. https://store.sure-electronics.com/product/AA-AB41136v3 Wish this could help you. Have a nice day~


02 Jun 2022

In the framework of a dual DSP setup ( one per side, 3 channels each ): Is it possible to link both APM2 in such a way that they both have access to the I2S flow from of WM8804? Each would use a single analog entry beside that. Goal is to have analog line input+ SPDIF input to this 6 channels / dual DSP power amp (based on T-AMP boards) Thanks, François

Hi, Francois. Thank you for your interest in our products. The application you mentioned is feasible in theory. 1. As for the connection of 2pcs APM2, please refer to the following video for the settings. https://www.youtube.com/watch?v=qa_bESPwCTY 2. Please note, since you want WM8804 to deliver I2S signal to both APM2, you need to tear down crystal oscillators on both APM2 and deliver clock signal to them through MCLK on WM8804 board. 3. You can make modifications based on the provided demo program for 4-in, 8-out system to meet your requirements. https://store.sure-electronics.com/images/documents/APM2_4In_8Out_DemoProgram.zip 4. There may be noise after APM2 is connected with T-AMP amplifier boards due to their high gain values. Wish this could help you. Have a nice day~


28 May 2022

Hello, I would like to have 1 in / 16 out DSP. Each output channel should have a different delay value but I need them to be synchronised since the values should be fairly precise. Do you have a tutorial for this or any kind of guidance? Thanks!

Hello, David. Thank you for your interest in our products. We do not have an off-the-shelf solution for your application. We can customize products to your requirements. Please note MOQ would be required. If you are interested, please feel free to contact us with store@sure-electronics.com for further discussion. Have a nice day~


25 May 2022

Hi I have problems with hiss and noise. Its very loud. When i remove the RCA cables from Adau1701 DSP AMP2, to my poweramp, the noise is gone. So its coming from the AMP2. Is there a Way to remove the noise, either in the hardware or in sigmastudio? Regards Thomas

Hi, Thomas. That may be ground noise. Please kindly try to connect ground of APM2 and ground of power supply of your power amplifier by a cable. If there is still problem, could you please kindly send us some videos or pictures so that we can find the problem and solve it for you? You can send to store@sure-electronics.com. Wish this could help you. Have a nice day~


23 Mar 2022

Hello, I'm interested by the APM2 and already own an ICP5 formerly used on a JAB4 : are they compatible ? many thanks in advance Francois

Hi, Francois. Thank you for your interest in our products. After connection with ICP5, you can program APM2 through SigmaStudio. Wish this could help you. Have a nice day~


14 Feb 2022

How to link two APM2 together. I want them to use the same source and potentially share the same clock to make sure the outputs are in sync. (My goal is to have 2inx6out so I'm also open to another solution like an i2s DAC to add extra outputs)

Hi, Guillaume. Thank you for your interest in our products. The following video may be helpful to you. How to achieve 4 in 8 out with WONDOM ADAU1701 APM2 https://www.youtube.com/watch?v=qa_bESPwCTY Wish this could help you. Have a nice day~


02 Feb 2022

Hi, me again; which is the typical current consumption of APM2 + ICP3 ? Thanks

Hello, Fulvio. Thank you for your interest in our products. The power consumption of APM2 + ICP3 is lower than 1W. Wish this could help you. Have a nice day~


02 Feb 2022

Hi, because space reasons, I can't use the USB connector (J2) to power the APM2 board. Can I use some pin of J3 or J4 ? (for example pin 1 of J4, designed as VIN)

Hello, Fulvio. Yes. You can use the pin 1 of J4 (VIN) to power APM2 with DC5V. Wish this could help you. Have a nice day~


24 Jan 2022

Hello, what's the easiest way to use this dsp with balanced input and outputs?

Hello, Alberto. Thank you for your interest in our products. You can use a single-ended to balanced and balance to single-ended conversion board. Or you can use an audio isolation transformer to convert the signal. Wish this could help you. Have a nice day~


13 Aug 2021

Are pins 2, 3 & 4 of the micro USB connector used for anything? I would like to power this with a DC-DC buck converter and USB cable using only pins 1 and 5 (+5v, GND)? Thanks.

Hello, Logan. Pin 2, 3 & 4 of the micro USB connector are not defined for any function. You can just use pin 1 and 5 for power. Wish this could help you. Have a nice day.


07 Jul 2021

Hey, just received my APM2. its connected to my trebble amp and speakers and works fine on that side. However, i connected it to my 500 watt class D amp board for my sub through the sub outpout and this isnt working. My sub doesnt seem to be picking up any signal. Any reasons why this could be happening?

Hi, camille. Please kindly check the following issues. 1. Check if there is signal output from APM3 sub channel 2. Check the settings of potentiometers 3. The maximum output of APM2 is around 1Vrms. Check if the input sensitivity range of your sub amplifier matches with the output. If possible, please send us some pictures or videos to show us your connection and the problem so that we can solve it for you.


15 Jun 2021

Hello, for S/PDIF (optical output), should I use the WM8804 S/PDIF AND IIS/I2S AUDIO SIGNAL TRANSCEIVER [744]? And send I2S signal from ADAU1701 to WM8804? Or what any other solution is there for optical out? Thank you! :D

Hi, Andrei. Thank you for your interest in our products. We can use APM2 and WM8804 converter board to get S/PDIF output. First, we need to get I2S output from APM2. Since the WM8804 converter board is master mode, so we need to set APM2 as the slave mode. Please kindly take the following steps. 1. remove the crystal oscillator on APM2 and connect with MCLK on WM8804 converter board. 2. Set the GPIOs of APM2 for I2S output as shown in the attached picture in SigmaStudio; 3. Connect the corresponding positions. The MP0 of J4 on APM2 is corresponding with DAT. The MP4 of J4 on APM2 is corresponding with SCK. The MP5 of J4 on APM2 is corresponding with BCK. Also connect the GND please. The following link is an instruction on how to achieve I2S input & output with JAB3. You can take it as a reference. https://store.sure-electronics.com/images/documents/How%20to%20achieve%20I2S%20input%20&%20output%20with%20WONDOM%20JAB3.pdf Wish this could help you.


27 May 2021

Hello, I just received the APM2 product and J2 power connection is NOT a Micro USB port - It looks more like a USB-C port. The ICP1 programming board at J1 does have a Micro USB port while this APM2 does not. Can you please tell me what cable I need to power the APM2 board as the instructions appear to be incorrect. Thanks.

Hi, Steven. We have changed the power supply jack of APM2 to USB Type-C port. So you would need a USB Type-C cable to power the APM2. We will revise the instructions on the website. Wish this could help you.


24 May 2021

Can I achieve 2 input x 6 output (high, mid, sub crossover) using 2 APM2 and 2 APM3? Like 1 APM2 and 1 APM3 for left channel, same for the right channel?

Hello, Francis. Thank you for your interest in our products. Yes, you can build the system as you mentioned. Please note that, you need to revise the program on your own. Wish this could help you.


09 May 2021

Can the crossover slope be programmed from 3db/ octave to 24 or 48db/octave? Also can I use it to for a 0.2 setup? i.e dual subwoofers independently controlled?

Hello, Martin. Thank you for your interest in our products. You can change the program according to your requirements through Sigma Studio. Here is a link you can visit for help if you have any problem. https://wiki.analog.com/resources/tools-software/sigmastudio Wish this could help you.

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