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Dear Khadas Community, By now we believe that everyone would already have seen pictures of our upcoming VIM4! And so you must be curious to know the key features of our latest VIM single board computer. Key Features: HDMI input & digital microphones for smart display & video conferencing applications Mali G52MP8(8EE) 800Mhz GPU, supports 4K UI, H.265 and H.265 encoding at 4K 50fps x4 display interfaces: HDMI, MIPI-DSI, V-by-One & eDP 8GB LPDDR4X 2016MHz, 64bit RAM for memory intensive software applications AP6275S Wi-Fi 6 module with 802.11a/b/g/n/ac/ax, 2X2 MIMO and RSDB OOWOW embedded service, for online OS delivery, device maintenance and more! Click the "More Details" button to see the full VIM4 specifications. Introduction to OOWOW We are super excited to tell you guys that we will be launching the OOWOW embedded system with VIM4. OOWOW was originally known as Krescue, and it is a huge upgrade to the original system! Key Features: Install / reinstall OS Download online OS images Remote access control via HTTP/SSH Backup and restore system Display full device information Configure device Device hardware testing Online script collection Rescue shell Developer and advanced features What's in the Box? VIM4 Single Board Computer (x1) New VIM Heatsink (x1) 3705 Cooling Fan (x1) Wi-Fi & BT Antennas (x2) User Manual (x1) Quickstart Guide (x1) Supported Accessories TS050 Touchscreen Khadas Tone Board USB-C 30W Adapter (White) USB-C Cable (White, Male to male) USB 10W Adapter (Black, light workloads only) USB-C Cable (Grey 2.0 to Type-C) HDMI Cable (19-Pin) 4G Module 5G Module (coming soon) M2X WWAN (coming soon) VBO LCD Module (coming soon) Labour Day Holiday The Labour Day Holiday is once again bearing down upon us, and our team will be having a short break from April 30th to May 4th 2022. During this time, there will be fulfillment delays from Khadas.com/shop, AliExpress.com, and Taobao.com. If you require immediate shipping, please buy directly from Amazon US, Amazon UK, Amazon JP, or any of your local distributors. Thank you for your continued patronage, we wish you a pleasant and joyous holiday! Warmly, Khadas Team

Dear Khadas Community, We would like to share a good news with you. Our VIM4 SBC with the Amlogic A311D2 SoC will be launching on 10 May! It's spot sale and available on all official platforms like Khadas shop / Aliexpress / Amazon. We would appreciate it if you could share this news with your friends and discuss on Khadas forum and social media platforms! We will keep updating more details and interesting things about this brand new single board computer. Please stay tuned and feel free to let us know your thought on it! KEY FEATURES Amlogic A311D2 x4 A73 performance cores at 2.2GHz, x4 A53 efficiency cores at 2.0GHz. Mali G52 MP8 GPU The 800MHz Mali G52 graphics processor and supports 4K UI. 8GB RAM 8GB LPDDR4X RAM with 64-bit bandwith and clocked at 2016MHz. HDMI & DMIC Inputs x1 micro HDMI input at 4K 60 fps, x2 digital microphones for versatile AV recording. Join US! The Khadas VIM4 will be launching on 10 May! Visit Khadas Community to join in our discussion, and we will publish the specifications, schematics and user manual to here soon. Reviewers can apply for samples using the button below: 'Tea' Headphone Amplifier Shipping Update For the second batch orders from Indiegogo, we will arrange the shipment at the end of April. And all the ‘Tea’ pre-orders on Khadas Shop will also be shipped out at the same time which is a month ahead of schedule! Check the button below to sip a Khadas Tea DAC/Headphone Amp. Keep it cool, Khadas Team

& Other News! Dear Khadas Community, The ongoing chip shortages are taking a toll on the entire electronics industry, and Khadas will have to increase prices of our single board computers across the board. Retail customers can refer to the table above for the revised prices. In addition: VIM1 and VIM2 will be discontinued for distributors Remaining stocks of VIM1 and VIM2 will be allocated to retail customers Distributors can email hello@khadas.com or your Khadas Representative to obtain an updated list of distribution prices. VIM3 Restocking Issue Khadas is also experiencing a temporary issue with restocking VIM3 single board computers, because the TPS2121RUXR chip (highlighted in red below) that controls power source selection between USB-C and VIN is in short supply. To deal with this temporary shortage, we will be manufacturing an alternative version of VIM3 for bulk orders and OEM projects, which does not use this chip. Retailers and Developers can continue to use the original version of VIM3. If you are a Distributor or OEM customer, you can click the button below to download the full technical briefing document. 'Tea' Headphone Amplifier Pre-Order ‘Tea’ is ready for full manufacturing, and we are now opening up pre-orders for retail customers. We estimate to be able to ship the ‘Tea’ Headphone Amplifier by late May. To pre-order ‘Tea’, please visit Khadas Shop: Introduction to VIM4 The Khadas VIM4 will be launching very soon! Visit Khadas Community to join in our discussion, or Khadas Docs for the specifications, schematics and user manual. Reviewers can apply for samples using the button below: You can learn more by watching the video above, or ask any questions via our forum: Useful Links TPS2121RUXR Technical Briefing Pre-Order 'Tea' VIM4 Documentation Apply to Review VIM4 Thanks for reading! Khadas Team

Ultraslim High-Resolution Headphone Amplifier for Smartphones Dear Khadas Community, It is with great joy and anticipation that we announce the upcoming launch of our latest hi-fi audio product the ‘Tea’, an ultra-slim high-resolution headphone amplifier for smartphones. This portable amplifier features the high-performance ESS ES9281AC Pro DAC, as well as LDAC and aptX HD bluetooth audio via the Qualcomm QCC5125 chip. Why Tea? ‘Tea’ was created to satisfy a high demand from our community for a “Portable Tone2 Pro”; many music streaming apps such as Spotify and Apple Music now have high-quality lossless music that can only be fully enjoyed when you connect a portable DAC such as the ‘Tea’ to your Android or iOS smartphone. Freedom to Move ‘Tea’ can connect to your smartphone wirelessly via bluetooth audio with LDAC and aptX HD, or wired via a ‘USB-C to C’ or ‘USB-C to Lightning’ USB cables that are included in the box. The ‘Tea’ DAC is thinner than an iPhone 13, but has a slight bump to accommodate the 3.5mm headphone jack, and the weight of this audio marvel is just 74 grams. As our lives transform to become mobile, and we untether from our desks, ‘Tea’ gives you the freedom to go outdoors again; listen to your favourite lossless audio tracks whilst at the seaside, in a cafe, or just whilst out on a stroll in nature. Freedom to move in harmony with our music is like food for our collective souls. Subscribe for Updates Introduce a ‘Tea’ DAC into your musical life and subscribe to our ‘Tea Mailing List’ via the landing page at khadas.com/tea. ‘Tea’ will officially launch on the 28th of October 2021, so as you can imagine, subscribers will be notified of important pre-launch discounts! Reviewers are Welcome We are now accepting applications to review the ‘Tea’ DAC, and you can apply to be a reviewer on our website. Forum Discussion If you have any additional questions and comments about our upcoming 'Tea' DAC, please visit our Community Forum. Warmly, Khadas Maker Team

Line-out volume adjustment, and other minor software improvements. Hello Community! We’ve just released the v1.30 firmware for your Tone2 Pro, you can download it from: https://dl.khadas.com/products/tone2/firmware/Tone2_Pro_Firmware_V1.30_210730.zip Changelog: Added the pre-amp feature (when enabled, line-out volume is controlled by the volume knob) Added LED indicator lights for pre-amp (3 green lights) Added a feature in which the volume gradually increases from zero on startup Fixed an issue in which the DSD format caused the input priority to revert to defaults Fixed other minor software issues… In a small number of cases, after you update the firmware the lights under the volume knob may flash green and your Tone2 Pro will be unresponsive. To fix this: Remove all USB-C cables (both USB and I2S ports) Reconnect only the USB-C (USB) port, whilst pressing and holding the volume knob Updated User Manual: We have uploaded the updated user manual to dl.khadas.com. How-to Update the XMOS Firmware to v1.30: Download XMOS v1.30 Firmware for your Tone2 Pro: https://dl.khadas.com/products/tone2/firmware/Tone2_Pro_Firmware_V1.30_210730.zip Forum Discussion: https://forum.khadas.com/t/tone2-pro-firmware-v1-30-line-out-volume-adjustment-more/13138 Tone2 Pro User Manual (EN): https://dl.khadas.com/Hardware/Tone2/Manual/tone2pro_user_manual.pdf Warmly, Khadas Maker Team

For Android Users: If your Android system is behaving abnormally or you are getting some unexpected outputs, it will be necessary to capture information from the running system log. This log will help us analyze and solve the problem. This document will teach you how to capture the running log of your system. Once you've acquired these logs, you can attach them to your support request over on forum.khadas.com, you can @tenk.wang, @jasonl, @goenjoy for assistance. Capture Running Log (Android OSes): https://docs.khadas.com/android/vim1/CaptureLog.html Setup Serial Tool (All OSes): https://docs.khadas.com/android/vim1/SetupSerialTool.html SecureCRT Software (All OSes): https://www.vandyke.com/products/securecrt/ Examples of USB to TTL Converter Tools: https://www.amazon.com/Adaptor-Download-Adapter-Converter-LinkMore/dp/B08VGRRJ67/ref=sr_1_4 Khadas Community Forum: https://forum.khadas.com/ Warmly, Khadas Maker Team

For Linux Users: If your Linux system is behaving abnormally or you are getting some unexpected outputs, it will be necessary to capture information from the running system log. This log will help us analyze and solve the problem. This document will teach you how to capture the running log of your system. Once you've acquired these logs, you can attach them to your support request over on forum.khadas.com, you can @numbqq or @Frank for assistance. Capture Running Log (Linux OSes): https://docs.khadas.com/linux/vim1/CaptureLog.html Setup Serial Tool (All OSes): https://docs.khadas.com/linux/vim1/SetupSerialTool.html SecureCRT Software (All OSes): https://www.vandyke.com/products/securecrt/ Examples of USB to TTL Converter Tools: https://www.amazon.com/s?k=usb+to+ttl+converter&ref=nb_sb_noss_2 Khadas Community Forum: https://forum.khadas.com/ Warmly, Khadas Maker Team

Hello Community! The month of July features various new software releases for Khadas SBCs. They were produced based on feedback from our community, and we hope that you’ll find them useful. Android: NPU Demo App for VIM3/3L Android R(11): V210604 for VIM3 NPU: Tengine v14 release (EN) for VIM3/3L For distributors and retail customers, please note: Tone2 Pro: updated retail price of US$249.9 Android NPU Demo App This is a pre-compiled demo app for your VIM3/3L's NPU (neural processing unit), and it will help you to quickly understand the basic capabilities of your Khadas SBC. Please note that this app was developed based on the 6.4.4.3 NPU SDK, so the Android OS of your VIM3/3L needs to be updated to the latest version before you can run the app. Download the pre-compiled NPU APK: https://dl.khadas.com/development/khadas_npu_release.apk Latest Android OS (by device): https://dl.khadas.com/products/ Download the APK’s source code: https://github.com/khadas/khadas_android_npu_app Download the NPU’s JNI code: https://github.com/khadas/khadas_android_npu_library Android NPU demo guide: https://docs.khadas.com/vim3/HowToUseAndroidNpuDemo.html How to use the Android NPU JNI: https://docs.khadas.com/vim3/HowToUseNpuJni.html Forum Discussion Thread: https://forum.khadas.com/t/vim3-vim3l-android-npu-app-initial-version-release/12658 VIM3 Android R(11) V210604 Preview ROM A preview ROM for Android R (version 11) has been released for the Khadas VIM3. You may use the MD5 checksum to verify the integrity of the files that you’ve downloaded. To install the ROM into your VIM3’s eMMC, you’ll need some flashing tools. Please note that Android 11 is still a work-in-progress, and we’ll commit the upstream patches to the Google Android AOSP together with the Baylibre Team. For developers who want to try out Android 12, you can download the latest Android source code from the Google AOSP website and build it yourself! ROM Information: Version - VIM3_R_AOSP_V210604 MD5SUM - d90277edfec90597d89af9046b606bab Media Type - eMMC Flashing Tool Information: MD5SUM - 54d8e791092206e455892b035530bebd OS Compatibility - Windows Upgrade Guidance: Linux Users - Forum Thread Windows Users - Run set_path.bat as administrator (just once) Run flash_vim3.bat Download the VIM3 Android R(11) V210604 Preview ROM: https://dl.khadas.com/products/vim3/firmware/Android/VIM3_R_AOSP_V210604.tar.xz Download the Windows Flashing Tools: https://dl.khadas.com/products/vim3/firmware/Android/fastboot_update.tar.xz Build your own firmware (Google AOSP Documentation): https://source.android.com/setup/build/building Forum Discussion Thread: https://forum.khadas.com/t/vim3-android-11-v210604-preview-rom-release/12448 NPU: Tengine v14 Release (English) Tengine SDK is used to convert a trained model into the tengine model that can be run on the NPU. We have since updated Tengine v12 to v14. Repositories: SDK - https://gitlab.com/khadas/tengine_khadas_sdk APP - https://gitlab.com/khadas/tengine_khadas_app Documentation: How to use the Tengine SDK How to compile and run the Tengine Demo Tengine Official Documentation: https://tengine-docs.readthedocs.io/en/latest/ Forum Discussion Thread: https://forum.khadas.com/t/npu-tengine-v-14-release-en/12638 Tone2 Pro’s Updated Retail Price: It is with a heavy heart that we have to announce an increase in the Tone2 Pro’s retail price, due to the global silicon chip shortage. The price will be raised from US$199.9 to US$249.9. The increase in price for both distributors and retailers will begin from the launch of our as-of-yet unannounced new product, which shall remain a mystery for now. Price Change: Old: US$199.90 New: US$249.90 Time: to be announced Tone2 Pro Homepage: https://khadas.com/tone2pro Community Happenings Birty’s Automated “VIM3 Water Auto Turret” Twister OS 5.13.5 kernel for Khadas Edge Devices Warmly, Khadas Maker Team

TLDR: VIM3 is getting official Armbian support, Google AOSP and Fuchsia OS, and has received TELC (Japan) and ROHS certifications. Hello Community! We know that it’s been a while since our last update, and the news has mostly been about the Tone2 Pro. In this newsletter we’re going to have a change of scenery by shifting focus to our VIM3 single board computer! Official Armbian Support for VIM3 (and more) We’re working with Armbian to provide full driver and OS support for all VIM devices. Armbian is a popular Debian based computer operating system for ARM development boards, and an image for your VIM3 is in the works. We hope to have it ready in 2-3 months. Visit the Armbian Homepage: https://www.armbian.com/ Google AOSP Project If you didn’t know earlier, your VIM3 is actually a reference board for the Google AOSP (Android Open Source Project), and we’ve released a beta version of Android 11 for VIM3. Android 12 is also in the works and will be released soon. Download: Android 11 for VIM3 (beta) If you want to build your own Android 12 image, refer to this document: https://source.android.com/setup/build/devices#vim3_and_vim3l_boards If you have technical issues, go to Khadas Forum for answers: https://forum.khadas.com/t/vim3-3l-google-aosp-coming-soon/9862 Google Fuchsia OS on VIM3 Google has officially built an image specifically meant to run on our Khadas VIM3! Check out our how-to build and run guide by Frank below. Please note that this is only meant for early adopters, as there is no GUI and you can only access the terminal via UART. Fuchsia OS VIM3 Build Guide (English): https://forum.khadas.com/t/fuchsia-sample-usage/12570 Fuchsia OS VIM3 Build Guide (Chinese):https://forum.khadas.com/t/fuchsia/12571 For complete and official documentation, refer to this link: https://fuchsia.dev/fuchsia-src/development/hardware/khadas-vim3 VIM3 Specifications Update We’ve also updated VIM3’s specifications sheet. Changes (Red: Deleted, Green: Added): OSes: Mainline Linux Ubuntu 20.04 LibreELEC Google AOSP Fuchsia OS Certifications: CE FCC TELC (Japan) RoHS Download new VIM3 spec-sheet: https://dl.khadas.com/products/vim3/specs/Khadas_VIM3_Specs.pdf Download certification documents: https://dl.khadas.com/products/vim3/certifications/VIM3_CERTIFICATE.7z Community Happenings Panfrost OpenGL ES 3.1 adds support for the Mali-G52 GPU (Amlogic A311D) Khadas donates $10,000 USD to Armbian A311D NPU SDK v6.4.4.3 released VIM3 successfully overclocked to 2.64GHz VIM3 Cryptocurrency Mining Cluster On a side note, the VIM3 may soon be getting official support from Home Assistant OS as well, and we want to thank the open source community for their efforts! If you have feedback regarding the VIM3 and/or would like to see more open source projects ported to Khadas devices, please air your suggestions over at Khadas Forum. Warmly, Khadas Maker Team

Summary: we've fixed issues with the Audio Filter and Noise Floor measurements. Who Needs This: You have a Batch 1 or 2 Tone2 Pro Your serial number starts with 0C... or 11... Summary: We’re now ready to release the v1.2 XMOS firmware and New MCU firmware for your Tone2 Pro. These two files when used in combination, will fix several issues such as the audio filters, and the high-noise floor at 44.1kHz and 48kHz respectively. If you have a batch 3 or later Tone2 Pro device, you do not need to perform this upgrade. Changelog: New MCU Firmware Fixed Audio Filters (White Noise) Fixed 44.1kHz and 48kHz (THD+N) Fixed Mono Signal (Low Probability) Enabled MCU upgrade via USB DFU XMOS Firmware v1.2 Enabled MCU upgrade via USB DFU Downloads: XMOS: XMOS DFU Tool XMOS v1.2 Firmware MCU: MCU DFU Tool New MCU Firmware Hardware Tool: Please note that to perform the MCU upgrade, you’ll need an ST-Link v2 hardware tool. However after this update, subsequent MCU updates can be done over the USB-C port. We will include a link in Khadas Shop (you must provide proof-of-purchase of your Tone2 Pro) for you to get a free ST-Link v2 hardware tool. This hardware device plugs into your computer’s USB port, and pokes into the Tone2 Pro’s GPIO pins on the underside. Refer to the MCU update guide below for usage instructions. Updating the XMOS: To update the XMOS firmware to v1.2, follow this YouTube video as per normal. Updating the MCU: 1. Connect the Tone2 Pro to your PC. 2. Install the ST-Link v2 software tool (run as administrator). 3. Download and unpack the New MCU Firmware. 4. Open the MCU upgrade tool. 5. Configure the tool. 6. Connect the tool to your PC's USB port. 7. Peel away a portion of the rubber foot below the “tone” branding. 8. Insert the pins into your Tone2 Pro, lifting up by 1mm to avoid contact with the metal shell. 9. Apply lateral (side) pressure to ensure good contact with the gold pads inside Tone2 Pro. 10. Open the MCU Firmware .hex file. 11. Press the flash button. 12. Reconnect your Tone2 Pro. Linux / Mac OS Automated MCU & XMOS Upgrade Scripts: Open a Terminal app and copy and paste either of these commands, internet access is required, sudo is not required. Update MCU: /bin/bash -c "$(curl -fsSL https://dl.khadas.com/Firmware/Tone2/upgrade_mcu.sh)" Update XMOS: /bin/bash -c "$(curl -fsSL https://dl.khadas.com/Firmware/Tone2/upgrade_dfu.sh)" If you need more technical help beyond this blog post, please visit the v1.2 firmware discussion over at Khadas Forum. Warmly, Khadas Team

Join our Khadas Linux Expert, @hyphop, as he teaches you how to configure your Linux installation for bit-perfect audio playback with your Tone2 Pro or Tone1! In this educational video, you will learn: 00:37​ Disable / remove PulseAudio for Linux 01:10​ Configure PulseAudio to ignore the Tone2 Pro 01:30​ Check if the kernel supports Native DSD 01:52​ Check Tone2 Pro's supported file formats and rates 02:05​ Introduction to MPD Player 02:30​ Install MPD Player 02:35​ Configure MPD Player 02:54​ Start MPD Player 03:01​ Play an internet radio stream 03:30​ Introduction to NCMPCPP 04:00​ Playback DSD, MQA, and PCM formats If you have any questions technical or otherwise, please join our discussion over at Khadas Forum: Linux Bit-Perfect Audio Discussion: https://forum.khadas.com/t/tone2-pro-bit-perfect-linux-audio/11936 Khadas Tone2 Pro: https://khadas.com/tone2pro Warmly, Khadas Team​

Pre-Order the Tone2 Pro from Khadas Shop before stocks run out. Dear Khadas Community, The Tone2 Pro has released to great reviews about it's compactness, ultra-low noise background, and superb sound quality at an affordable price of $200 USD. Reviewers have called it a unique, aurally pleasurable, fully featured DAC-AMP combo that contains everything you need in a small and convenient package. Before Tone2 Pro goes out-of-stock again, secure your place by pre-ordering from Khadas Shop (ships early April) and bring the Tone2 Pro with you for your next music-filled holiday or road trip! > Pre-Order Now < Soundcat to Distribute Tone2 Pro in South Korea: We've just partnered up with Soundcat to distribute the Tone2 Pro in South Korea! So if you live in the land of beautiful K-Pop girls (and guys), you'll soon get to buy a Tone2 Pro and Balanced RCA to XLR-3 conversion cables without having to wait 2 weeks for shipping - 사랑해! Soundcat is South Korea's #1 Pro Audio distributor, and they mainly serve the portable audiophile market. But they also sell directly to top K-Pop artists, broadcasting companies, studios, and houses of worship. Soundcat Website Khadas Authorized Distributors Brief Introduction to the Soundcat Company French Language Tone2 Pro User Manual: Courtesy of the fine folks over at Audiophonics (another distributor of Khadas Audio Products such as the original Tone1), we now have a Tone2 Pro user manual translated into French - Je vous remercie! Tone2 Pro User Manual (FR) Audiophonics Website Notable Tone2 Pro Reviews: We've taken the liberty of combing through YouTube to make a compilation of the best, most detailed reviews of the Tone2 Pro's audio quality and hardware features. We hope you will enjoy watching these videos as much as we did! "As a plain DAC that you plug in and use, its performance cannot be denied. So I am going to put it on my recommended list." Watch AudioScienceReview's comprehensive technical review or read his written article. "Khadas Tone2 Pro is a great DAC, it's very precise, it has lots of details, it has speed, it pinpoints and layers things greatly. It's headphone output is very good, but it cannot match the power and authority that a separate [amplifier] can give you. However as an all-in-one device, if you don't have especially demanding headphones or are a bass-head, it will do a fine job." iiWi gave us an excellent score of 9.3/10, read his written review here. "Just be prepared to have a revelation of cleanliness, transparency and detail. It could easily be the last unit you'll ever need with your sensitive IEMs, portable headphones and desktop dynamic headphones. At just $200 bucks, it deserves my highest praise and recommendation." SoundNews.Net gives our Tone2 Pro the Gold Award! You can also read his detailed written review. "The Khadas Tone2 Pro works in a lot of applications, its advantage is with the balanced circuit. Its a great little thing, its unique, and I really enjoy using it!" In addition to the video, Dr. Schweinsgruber also wrote a comprehensive written review. "I am absolutely not selling this, this is going into my little laptop bag, and come the end of covid-19 and quarantines, this will be my on-the-go [Tone2 Pro DAC]" Zeos made a thoroughly entertaining video with his head-mounted camera. "Sound [is] natural and well-balanced, but not going into the monitoring / clinical representation...almost flawless with sensitive headphones...I rarely say such things, but for me this device exceeds its price-range noticeably...and they've managed to create a black background. I don't know what to compare it with, it outperforms dongle DACs hands-down...and I really like this device." Porta.Fi is enamored with our diminutive Tone2 Pro. It is our pleasure to develop breakthrough performance products that push the envelope of what's possible for you and the Khadas Community. Khadas: "Think different, be different, behave different, and make a difference." Warmly, Khadas Team