Posts Tagged ‘speaker’
Orange Pi Development Boards

$129 Allwinner R18 based 3-Mic Far Field Amazon AVS Development Kit in the Works

January 4th, 2018 17 comments

Several companies are already offering development kits for Amazon AVS (Alexa Voice Service), but as we’ve seen in the past, those are rather expensive with far-field kits such starting at $349 with kits such as Synaptics AudioSmart 4-Mic Development Kit, or Intel Speech Enabling Developer Kit, and hands-free kits being barely cheaper at $299 and up.

But there will soon be a cheaper solution, as Allwinner and SinoVoIP (aka Banana Pi) are working on “SoC-Only 3-Mic Far-Field Dev Kit for Amazon AVS” that includes 3 microphones, and works without special DSP, relying instead on Allwinner R18 processor’s audio codec and capabilities.

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Allwinner SoC-Only 3-Mic Far-Field Dev Kit for Amazon AVS (aka R18-AVS-EVK) specifications:

  • SoC – Allwinner R18 quad-core Cortex-A53 processor @ 1.15GHz with Mali400MP2 GPU
  • System Memory – 1GB DDR3
  • Storage – 8GB eMMC flash
  • Video Output – HDMI
  • Audio – 6x Microphones, 2x AEC, AUX and headphone output; GMEMS voice recognition algorithm
  • Connectivity – Dual band WiFi, Bluetooth 4.0
  • USB – 1x USB type A port, 1x micro USB OTG port
  • Power Supply – 12V DC input
  • Dimensions – Mainboard: 100 x 100mm; microphone array board: 90 mm ∅

The board will support Linux operating systems at first, but Android is also being worked on. A ribbon cable is also included in the kit to connect the mic array to the main board. Now you may wonder why a 3-mic development kit comes with 6 microphones. Allwinner explains:

6 microphones are included on the board, while only three are used and qualified, providing flexibility to tune for 6/4/3/2 mic solutions and freely match with different product designs

I’m not 100% sure what that means, but I guess the kit only works for three for now, but in the future algorithms may support a combination of up to 6 microphones. We’ll have to see how the solution works compared to DSP based systems.

Allwinner R18 Block Diagram

The development kit is now found on Amazon website yet, but a page on Banana Pi website mentions they are 50 unit for pre-sale for $129 with shipping scheduled on February 5, 2018. The “Buy” link does not work yet. A few more details may be found in the product page on Allwinner website.

Nexell NXC100 Voice Recognition Chip, NXP4330Q Processor, and ALTO Development Board

November 21st, 2017 No comments

I wrote about NanoPi Fire2 & Fire3A boards based on Nexell S5P processors a few days ago, and at the time, as I checked out Nexell website, I found out about the company’s NXC100 Voice Recognition SoC that can be used in 4-mic array board.

The chip can then be connected through SPI to a host processor, and Nexell appears to have a NXP4330Q Smart Voice kit based on their quad Cortex A9 processor of the same name. But since documentation is really limited, I looked for more details, and came across NXP4330Q based ALTO board design by InSignal, which sold the Exynos powered Arndale boards a few years back.

Nexell NXC100 Voice Recognition SoC

The chip is the only product from the “A.I related” section of therir website, but more are likely to come out as the company is working on GP-GPU (General Purpose GPU), machine learning, and even registered website. But no info for now about the later.

Back to NXC100 chip with the specifications:

  • 4x Channel Digital MIC Interface configurable (1 to 4 microphones) for far-field voice processing
  • Speech/Audio Features – Sound beam-forming, dynamic noise suppression, echo cancellation, I2S interface
  • Host Interface – SPI (with Nexell processors)
  • Power Management – On-chip 3.3V LDO for minimal external component
  • Package- 6.5×6.4mm TSSOP20

That’s about all we know from the product page. The developer page links to NXC100 datasheet, and reference schematics for a development board with NXP4330Q processor and a 4-mic array board based on the solution. Sadly, those files require login credentials, so you’d have to contact the company, and likely provide details about your company and project(s) before getting access.

Nexell NXP4330Q Processor

At first, I thought this was a new processor from NXP Semiconductors I had never heard off, but no, that’s really a quad core ARM Cortex A9 SoC from Nexell themselves.

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NXP4330Q processor specifications:

  • CPU – Quad core Cortex-A9 @ 1.4GHz with 32Kbyte I-Cache, 32Kbyte D-Cache per core, 1MB L2 Cache, VFP and NEON
  • GPU – Enhanced 3D graphic processor with support for OpenGL|ES 1.1/2.0, Open VG
  • Memory/Storage Controller
    • LPDDR2/3 and DDR2/3 up to 4Gbytes @ 933MHz (TBC)
    • SRAM, ROM and NOR flash controller
    • SLC/MLC NAND flash Controller w/ up to 60bit ECC
    • Up to 3x independent SD/MMC/eMMC controllers
  • Display Controller & Video Post-processor
    • Up to 2 separate displays up to  1920×1280 @ 60hz
    • 24bit RGB, i80 I/F, LVDS, HDMI 1.4a w/HDCP 1.4 compliant, MIPI-DSI
    • 3D De-interlace, Fine video scalar and Color space converter
  • Video – 1080p multi-format video decoder, 1080p H.264 video encoder, MPEG-TS parser with DVB-CSA for TV application
  • Video Input Processor – 3x 8bit BT656/601 format, MIPI-CSI
  • Network Connectivity – Gigabit Ethernet MAC
  • Peripherals & Interfaces
    • USB – USB 2.0 HSIC, USB 2.0 Host and USB 2.0 OTG
    • 6x UART, 3x SPI, PPM, 3x I2C, 3x PWM
    • 2x MPEG-TS
    • 3x I2S, SPDIF Rx/Tx, 2x PDM for glueless interface w/ Digital MIC
    • 8x 12-bit general purpose ADC
  • System Controller
    • 32 channels DMA, Interrupt Controller
    • Clock & Power management for Normal, Idle, Stop and suspend to RAM (Deep Sleep)
    • 4x channels Timer/Watchdog Timer
    • RTC
  • Security- ARM TrustZone: TZPC, TZASC and TZMA; Hardware crypto accelerator : DES/TDES, AES, SHA, MD5 and PRNG; Secure boot and Secure JTAG
  • Package – 17x17mm body size, 513 FCBGA, 0.65mm pitch

It’s been designed for tablets and cell-phones, and manufactured with a 28 nm low power process. I assume the processor is then a few years old. But then I looked at S5P4418 page, and the block diagram is exactly the same, so Nexell NXP4330Q should be Samsung S5P4418, but the company is just not allowed to promote Nexell S5P4418, and instead can sell NXP4330Q. This is further confirmed by the developer’s page for NXP4330(Q) which refers to S5P4418 too, and again nothing is accessible without login. There’s also an automotive grade version of the processor – NXP4330Q-A – compliant with AEC-Q100 standard.

ALTO Development Board

I still looked for an NXP4330Q board that might use NXC100 voice chip, and I had not luck, except for Insignal ALTO board based on NXP4330(Q) minus the MIC array part.

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For unknown reasons, the company did not provide photo for the complete development board (only close up on some parts), but they still release the block diagram, and the specifications with the board comprised of a CPU module and a baseboard:

  • CPU Module
    • Nexell NXP4330Q CPU
    • System Memory – 1GB DDR3 (x32 1EA or x16 2EA)
    • Storage – 8GB eMMC 4.5 flash
    • Power Management – NXE2000(PMIC) (Exclude fuel gauge and charger)
    • Board to Board Connectors – 2x 100-pin connectors
  • Base Board
    • Storage – SD card slot
    • Display – HDMI 1.4, LVDS LCD, capacitive touch
    • USB – 2x USB Host ports, 1x USB device
    • Connectivity – 10/100M USB Ethernet (which not make use of the GMAC?), optional 802.11b/g/n WiFi via  WFM50 module
    • Serial – 4x UART
    • Camera – 5MP MIPI CSI camera
    • Debugging – 1x Debug RS232 DB9 port, 20-pin JTAG connector
    • Audio interface connector for audio codec board based on AK4953 (24bit 96Khz, Default)
    • TVP5150 Interface for NTSC/PAL Input(TV Input)
    • Misc- 1 Power Switch, 1 Reset / 1 Power / 5 Functional Buttons; battery/charger extension module

The kit ships with a 5V/2A power adapter, a serial cable, a HDMI cable, a 1024×600 TFT LCD module, and a capacitive touchscreen panel. Public documentation is inexistent, which seems to be a common feature of all Nexell branded SoCs and boards.

Nexell Voice Smart Assistants Block Diagram

I was about to close this post on a disappointing note, but I found two block diagrams for their voice assistant. The first is shows NXC100 used with NXP4330Q SoC as discussed above, with Linux and Android BSP available, and Amazon Alexa support.

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The second appears to be more integrated at first, as it does not include a separate voice processor, but all four microphones’ audio data and voice processing is instead handled by Nexell NXP3220 dual core Cortex A7 SoC. The processor does not include any special hardware, so I’d assume it’s designed for lower end smart speakers that may not filter noise as well.

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I’ve also noticed Nexell has a new 64-bit ARM 4K/UHD processor (NXP5440) with USB 3.0, Gigabit Ethernet, and DVB support, but since it has nothing to do with voice recognition or smart speakers, that may be for another post later on.

Intel Speech Enabling Developer Kit Works with Alexa Voice Service, Raspberry Pi 3 Board

October 28th, 2017 4 comments

We’ve known Intel has been working on Quark S1000 “Sue Creek” processor for voice recognition for several months. S1000 SoC is based on two Tensilica LX6 with HiFi3 DSP, some speech recognition accelerators, and up to 8x microphones interfaces which allows it to perform speech recognition locally. The solution can also be hooked to an application processor via SPI, I2S and USB (optional) when cloud based voice recognition is needed.

Intel has recently introduced their Speech Enabling Developer Kit working with Amazon Alexa Voice Service (AVS) featuring a “dual DSP with inference engine” – which must be Quark S1000 – and an 8-mic array. The kit also includes a 40-pin cable to connect to the Raspberry Pi 3 board.

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Intel only provided basic specifications for the kit:

  • Intel’s dual DSP with inference engine
  • Intel 8-mic circular array
  • High-performance algorithms for acoustic echo cancellation, noise reduction, beamforming and custom wake word engine tuned to “Alexa”
  • 6x Washers
  • 3x 6mm screws
  • 3x 40mm female-female standoffs (x3)
  • Raspberry Pi connector cable

I could not find detailed information to get started, except for assembly guide shown in the video below. We do not that the kit will work with Amazon Alexa, and requires a few extra bits, namely a Raspberry Pi 3 board, an Ethernet cable, a HDMI cable and monitor, USB keyboard and mouse, an external speaker, a micro USB power supply (at least 5V/1A), and a micro SD card.

The video also points to Intel’s Smart Home page for more details about software, but again I could not find instructions or guide there,  except links to register to a developer workshop at Amazon Re:Invent in Las Vegas on November 30, 2017.

Intel Speech Enabling Developer Kit can be pre-ordered for $399 directly on Intel website with shipping planned for the end of November. The product is also listed on Amazon Developer page, but again with little specific information about the hardware and how to use it. One can assume the workflow should be similar to other AVS devkits.

Thanks to Mustafa for the tip.

Amazon Introduces Echo 2, Echo Plus, Echo Connect, and Echo Spot Alexa Devices

September 28th, 2017 No comments

Beside their “all-new” Amazon Fire TV 2017, Amazon has made a bunch of other announcements mostly related to their Alexa services with four new or updated Echo devices:  the “all-new” Echo, the Echo Plus, Echo Connect, and the Echo Spot.

2017 Amazon Echo (aka Echo 2)

The new second generation of the Alexa based Echo has a new smaller design, improved sound with Dolby processing, and a lower price at just under $100.

Some of the key features include:

  • Speakers – 2.5″ woofer and 0.6″ tweeter
  • Connectivity
    • Dual band 802.11 b/g/n WiFi for streaming music from Amazon Music, Spotify, Pandora, etc…, controlling smart devices
    • Bluetooth LE
  • Audio
    • 3.5mm audio jack
    • 7-mic array using beamforming technology and enhanced noise cancellation.
    • Improved wake-word (“Alexa”) detection
  • Various designs with 6 different fabrics
  • Dimensions – 148 x 88 x 88 mm
  • Weight – 821 grams

The Echo can make free calls to the US, Mexico and Canada, control smart home devices such as the new Fire TV media player.

Amazon Echo Plus

Echo Plus has similar features to the Echo, but adds a built-in smart home hub to connect your smart devices such a lights, locks, and others. It sells for $149.99 with a Philips Hue smart lightbulb (while supplies last).

Amazon Echo Plus  main features and specifications:

  • Speakers – 2.5″ woofer and 0.8″ tweeter
  • Connectivity
    • Dual band 802.11 b/g/n/ac WiFi
    • Bluetooth LE
  • Audio
    • 3.5mm audio jack
    • 7-mic array using beamforming technology and enhanced noise cancellation.
    • Improved wake-word (“Alexa”) detection
  • Built-in hub for simple setup of compatible (Zigbee) smart home devices
  • Misc – Light ring, volume ring, action button, microphone on/off button
  • Various designs with 6 different fabrics
  • Dimensions – 235 x 84 x 84 mm
  • Weight – 954 grams

Just like the Echo 2, Echo Plus can make free calls to North America, and control smart devices over WiFi and BLE, but the smart home hub appears to add support for Zigbee too allowing for a wider range of devices.

Echo Spot

Echo Spot is a compact devices with a round screen that works like other Echo, but can also show news, weather, smart home camera feeds, video calls, Alexa skills, and more on its display. Sold for $129.99 with delivery planned for December.

Key features:

  • Speakers – 1.4″ speaker
  • Display – 2.5″ round display
  • Connectivity
    • Dual band 802.11 b/g/n WiFi
    • Bluetooth LE
  • Audio
    • 3.5mm audio jack
    • 4-mic array using beamforming technology and enhanced noise cancellation.
    • Improved wake-word (“Alexa”) detection
  • Camera – front facing camera
  • Misc – Volume up/down, mic/camera on/off button,
  • Various designs with 6 different fabrics
  • Dimensions – 104 x 97 x 91 mm
  • Weight – 419 grams

Echo Spot comes with a single speaker, a simpler 4-mic arrow, and supports all features of the Echo 2 device.

Echo Connect

Echo Connect is a little different. It requires an Echo device, and transform it into a smart landline connected speakerphone, allowing you to call any phone numbers leveraging Alexa service, the microphone array, and your landline, if you still have one…

Echo Connect specifications:

  • Connectivity – Dual band 802.11 b/g/n/ac WiFi
  • Ports – RJ11 phone jack
  • Misc – Reset button, LEDs
  • Dimensions – 130 x 90 x 29.5 mm
  • Weight – 126.9 grams

Amazon is taking pre-orderd for Echo Connect for $34.99 with delivery scheduled to start on December 13, 2017.

Onkyo Has Developed a Shaker Turning Walls & Home Appliances Into Speakers

September 22nd, 2017 6 comments

According to an article on Nikkei Technology, Onkyo has designed a shaker that can be attached directly to walls and/or the surface of home appliances, and turn them into speakers to play music and voices.

The device developed using Onkyo voice & music playing technologies, has a a minimum resonance frequency of 115 hertz, and measures just 41x 36 x 21 mm. The company expects it to be used in places where visible speakers are problematic, either due to installation issues because of requirements such as waterproofness or air tightness, or for aesthetic reasons.

Onkyo will provide the shaker to OEM’s in order to be integrated into home appliances or walls for artificial intelligence, or Internet of things applications. So voice enabled walls and washing machines may just be around the corner…

Review of Vobot Alarm Clock with Alexa

September 17th, 2017 4 comments

Karl here with a review of Vobot sent By Cafago. I had to Google it when I was asked to review it. Turned out it was an Echo type device with a pixel display and a battery. It started as an Indiegogo campaign. I had been wanting to try to do some sort of voice control with my home automation so I agreed to review it.

Vobot Clock C1 Specifications

These are pulled from Vobot’s website. No power supply is included but a long USB cable is.

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Vobot Setup

I let my wife do the initial setup as I figured that she would use it the most. She followed the instructions, and it seemed straightforward from what she told me. She said she had to reboot it once during a step but it continued the setup with no problems. She tied to our Amazon Prime account, and she quickly was playing some music. During research, I did find out that it was not an always listening device.

Firmware Update

I logged into today to see if anything had changed, and there was an update. It suggested that I rebooted the device so I did before updating. Without logging in I wouldn’t have known there was an update. Maybe I missed something but I don’t remember seeing or hearing some sort of notification. I received a verbal notification that it could take up to 10 minutes, but only took a few minutes. The thing is I have no idea what has changed or improved. There is no changelog.

Vobot Display

Display settings allow you to set Brightness, and the time to display Time, Date, Day of Week, Battery Status, and Date + Time.

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That’s what the time display looks like.

After pressing the mic button

Get this at times and the eyes blink

Date and time

Hard to catch this one..Starting to play music

Unplugging power and of course get different one when plugging in

Loading music stream


I wanted to do a teardown when I first received the speaker, but I was afraid to break it. Now here at the end, I finally put some force behind it and finally got it apart. Only a few minor scratches and it seems to be fine. The teardown reveals that it is running on a Mediatek MT7688AN, and confirms battery’s capacity. 512MB NANYA storage NT5TU32M16FG-AC completes the list of the main chips. Maybe some enterprising soul will hack this and bring some imaginative new usage.

One big issue

Everything that I tried worked the way I expected for the most part . Home assistant can emulate a Hue bridge, but after reading in the forums, it only works with an Amazon Echo or Google Home speaker. Bummer, that is not the real issue I wanted to bring up. I really wish that it had an always listening microphone. You have to press the button to put it in listening mode. I understand that it has a battery, and would drain the battery but why not have it always listening when plugged in and use the button when roaming about.

Random final thoughts

OK now that I have a device that will take voice commands now what. I like the scrolling display. It is pretty cool and a little retro. I used this about 95% of the time just to play music. Don’t expect much from the speaker, but you can send audio to a home system through the 3.5mm jack on the back.

I know that there are 1000’s of skills but few attracted me. I did like the idea of calling another Alexa device but not supported. Arggh, OK maybe another issue. I did use the weather feature asking about the weather for the next day on occasion.

My 5 year old son was easily able to start music, and it could understand his voice which surprised me. The display is nice, and battery powered is a plus, but I don’t understand one thing. For just about the same price, I can get an Echo Dot which gets me always listening, and 100% works with all the features but no battery or display. I bet that the limitations with the exception of the always listening is inherent to all non Echo devices.

If you are looking for a portable Alexa powered device with a display then the Vobot might be for you. Seems sturdy. Descent battery life. I listened for about 2 hours and it still had a charge on the battery. To get an official Echo Tap it sets you back $120. It is the only official Echo that has a battery.

I would like to thank Cafago for sending the device for review. They provided a coupon code “V3127SA” for the Vobot which is good until 9/30/17, and brings the price down to $ 41.99/€36.1. You’ll also find it for $45 and up on other sites such as or Amazon.

Amlogic A111, A112 & A113 Processors are Designed for Audio Applications, Smart Speakers

September 9th, 2017 6 comments

Amlogic processors are mostly found in TVs and TV boxes, but the company is now apparently entering a new market with A111, A112, and A113 audio processors. I was first made aware of those new processors through Buildroot OpenLinux Release Notes V20170831.pdf document posted on their Open Linux website, where two boards with Amlogic A113D and A113X are shown.

S400 Version 03 Board

First, S400 board with the following key features/specifications:

  • SoC – Amlogic A113D CPU
  • System Memory – 1GB DDR3
  • Storage – 512MB SLC NAND flash
  • Display I/F – MIPI interface
  • Connectivity – Gigabit Ethernet SDIO WiFi/BT (AP6356S)
  • Audio
    • 2x Audio headers (MIC_Connector & SPK_Connector)
  • USB – 1x USB 2.0 OTG
  • Expansion – 2x PCIe ports
  • Misc – 6x ADC Keys, IR_IN/IR_OUT, UART Interface (RS232)

The second S420 board is based on A113X SoC, and comes with less features (no display, no Ethernet, no PCIe…), less memory:

  • SoC – Amlogic A113X CPU
  • System Memory – 512 MB DDR3
  • Storage – 512MB SLC NAND flash
  • Connectivity – SDIO WiFi/BT (AP6356S)
  • Audio
    • SPDIF_IN
    • 2x Audio headers (MIC_Connector & SPK_Connector)
  • USB – 1x USB 2.0 OTG
  • Misc – 6x ADC Keys, IR_IN/IR_OUT, UART Interface (RS232)

The document also explains how to build Linux built with buildroot (you’ll need an Amlogic account), and use audio via applications or frameworks such as aplay, gstreamer, alsaplayer, shairport (Airplay), VLC, DLNA, etc…

Information about Amlogic A113X/A113D processor is lacking on the web, but I eventually found that Amlogic had a YouTube account with now a whopping two subscribers (including yours truly), and one of the two videos was an Alexa voice services demo on Amlogic A113 with what looks like a microphone array inserted on the top of the board.

Further research led me to a page in Chinese discussing Amlogic A111, A112, A113 audio processors, and revealing that Xiaomi AI smart speaker is based on Amlogic A112 quad core Cortex A53 processor, that also shows up in GeekBench running Android 6.0. They also report that A113 features the same four Cortex 53 cores, but has better audio capabilities with 8x PDM interfaces, and 16x I2S interfaces. I also found a page about a microphone array designed for Amlogic S905/S912/A112, and based on Knowles SPH0645LM4H-B miniature microphones .

Finally, I decided to go directly to Amlogic website, and they do have pages for A111 and A112 SoCs, strangely not indexed by search engines so far.

Amlogic A111 key features:

  • CPU – Quad-core ARM Cortex-A5
  • Audio Interface
    • 2-channel I2S input and output
    • TDM/PCM input and output, up to 8 channels
    • S/PDIF output
  • Video Interface – LVDS and MIPI-DSI panel output
  • Security – Supports secure boot and secure OS
  • Ethernet – 10/100/1000M MAC
  • IP License (Optional) – Dolby Digital, Dolby Digital Plus, DTS Digital Surround, DTS HD, DTS Express
  • Process – 28nm HKMG

Amlogic A112 key features:

  • CPU – Quad-core ARM Cortex-A53
  • Audio Interface
    • 8-channel I2S and S/PDIF input and output
    • TDM/PCM input and output, up to 8 channels
    • 2-channel PDM input
  • Video Interface – RGB888 output
  • Security – Supports secure boot and secure OS
  • Ethernet – 10/100M MAC+PHY
  • IP License(Optional) – Dolby Digital, Dolby Digital Plus, DTS Digital Surround, DTS HD, DTS Express
  • Process – 28nm HKMG

If you are interested in evaluating / playing with those processors, and cannot get hold of Amlogic boards (since they only deal with companies), one solution is to get Xiaomi AI smart speaker available for pre-order/arrival notice on sites likes GearBest or GeekBuying, and expected to ship on October 1st.

Thanks to vertycall for the tip.

X-Powers AC108 is a Quad-Channel ADC Chip for Microphone Arrays

August 28th, 2017 2 comments

X-Powers, a company better known to supply PMIC “companion” chip for Allwinner processors, also made some audio chips including AC108 is a chip specifically designed for microphones arrays with support for 4 microphones, and a I2C + I2S output interface to the host processor. Microphone arrays are particularly useful for smartspeakers, and especially hot word detection (voice activity detection) as single microphone setups like I use with Orange Pi Zero, may have trouble detecting hot words like “OK Google” in noisy environments (music playing, alarm ringing…).

X-Power AC108 specifications:

  • 108 dB dynamic range (A-weighted) @ 0 dB boost gain
  • -90 dB THD+N (total harmonic distortion plus noise) @ 0 dB boost gain
  • 4x programmable boost amplifiers with 0dB to 45dB in 3dB step
  • ADC sample rates supported – 8kHz,12kHz,16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz,96kHz
  • Analog mixer and digital mixer in record data path
  • 4x fully differential microphone inputs: MIC1P/N ~MIC4P/N configurable as pseudo differential,  single-ended mode, or digital MIC data pin
  • 4x low noise mic bias outputs: MIC1_BIAS~MIC4_BIAS with a 1.5V to 4V programmable bias voltage
  • 2x DMIC SCLK output @ 1M~3.25M
  • Two I2S data output configurable as
    • I2S/PCM format using 1 pin to output 2 channel data of 1 devices.
    • I2S/PCM format using 2  pins to output 4 channel data of 1 devices.
    • TDM format using 1 pin to output 4 even 16 channel data of 4  devices.
    • Encoding format using 1 pins to output 4 even 16 channel data of 4  devices.
  • DPLL support a wide input for 6-/12-MHz, 6.144-/12.288-MHz, 5.6448-/11.2896-MHz, 13MHz and 19.2MHz.
  • Control Interface – I2C / TWI from 100 kHz up to 400 kHz
  • Integrated LDO allowing single 3.3V supply
  • Power Consumption – < 4mA per ADC channel
  • Package – 48 pin, 6×6 mm2 QFN

The product page does not provides that much more information, but there’s apparently EVM which you can purchase by contacting the company.

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I could not find pricing information, but X-Powers normally provides price-competitive solutions. I could not find any boards using AC108 yet, but we should get more info about that tomorrow.

Categories: Audio, Hardware Tags: audio, automation, speaker, x-powers