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I’ ## Freelancer Task: Magisk Module for SIP ⇄ SIM Audio Bridge (Jack-Only) ### Project Type Android system / audio engineering (Magisk, AudioPolicy, rooted devices) ### Target Devices Xiaomi Redmi 6 ** Android **8–9** (6A) * **Rooted with Magisk** * **NO custom ROM building** --- ## Objective Create a **Magisk module** that **forces all SIP and SIM call audio through the 3.5 mm wired headset jack only**, enabling **physical TRRS loopback audio bridging**, with **DSP fully disabled**. ## Technical Requirements ### Audio Routing (Critical) * Force **wired headset / wired headphone** as the **only valid**: * Audio **output** device * Audio **input** device * Disable or deprioritize: * Speaker * Earpiece * Bluetooth SCO / A2DP * USB audio (if it steals routing) **Files to override (systemless via Magisk):** * `/vendor/etc/[login to view URL]` * OR `/vendor/etc/[login to view URL]` (older builds) --- ### DSP / Audio Effects (Critical) Disable **all voice processing** that interferes with loopback audio: * Acoustic Echo Cancellation (AEC) * Noise Suppression (NS) * Automatic Gain Control (AGC) **Files to override (systemless):** * `/vendor/etc/[login to view URL]` or `.xml` * `/system/etc/[login to view URL]` (if referenced) DSP must be **completely off** for: * `STREAM_VOICE_CALL` * `MODE_IN_CALL` * `VOICE_COMMUNICATION` --- ### Magisk Module Structure Deliver a standard Magisk module with: ``` SIP_SIM_JackOnly/ ├─ [login to view URL] ├─ [login to view URL] ├─ [login to view URL] └─ system/ ├─ vendor/ │ └─ etc/ │ ├─ [login to view URL] (or .conf) │ └─ [login to view URL] / .xml └─ etc/ └─ [login to view URL] (if needed) ``` --- ### Boot-Time Enforcement (Required) In `[login to view URL]`: * Disable Bluetooth audio routing (SCO/A2DP) * Ensure wired headset is preferred at boot * Optional but preferred: * Restart `audioserver` once after boot * Watchdog to re-enforce routing if audio stack restarts --- ### SIP App Compatibility * SIP apps must be able to use: * `STREAM_MUSIC` for playback * Do **not** rely on SIP apps using `VOICE_COMMUNICATION` --- ## Validation & Testing (Mandatory) The freelancer must provide: * `dumpsys audio` output **before vs after** * Proof that: * Calls **never route to speaker** * Wired headset remains active throughout calls * DSP does not suppress injected loopback audio * Test with: * One SIP app (e.g., Linphone or similar) * One SIM call --- ## Deliverables 1. **Flashable Magisk module** (zip or folder) 2. All modified config files with comments 3. Short README: * Install steps * Test procedure * Known limitations 4. Confirmation: --- ## Skillset Required * Android audio policy & routing * Magisk systemless modules * Rooted device debugging * `dumpsys audio`, `logcat`, `audioserver` * Xiaomi / Qualcomm audio stack familiarity --- ## Timeline * 3–days for first working version * --- ## Clarifying Notes for Freelancer * Physical **TRRS loopback cable is already designed** * Your job is **software enforcement only** * This is a **telecom bridge**, not a consumer phone * Stability > elegance --- ## Success Criteria (Simple) > During SIP ⇄ SIM calls, **audio only flows through the wired headset jack**, with **no DSP**, **no speaker**, and **no ROM build**. ### the freelancer do not have a redmi 6 in his hand so the job have to be done remote using anydesk and a redmi 6 connected to it 1. we will need to test it by A.. have a sip server ready with a sip client that is located at the freelancer location B. the redmi 6 will dial a local number to party 2 C. now freelancer can talk with the sip client to party 2 2. we will build the loopback audio jack based on the diagram provided 3. . if the test is good we need to method how to implement the magisk module to 200 redmi 6 phone
Project ID: 40196354
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34 freelancers are bidding on average $164 USD for this job

Hello, Redmi 6 Magisk Audio Routing #2 project caught my attention. With expertise in XML, Mobile App Development, Android, Mobile App Testing, and Mobile Development, I am confident in delivering the required Magisk module. Budget flexibility and on-time delivery are my priorities. Let's discuss the details and get started. Please review my 15-year-old profile for past work. I am eager to showcase my commitment to this project. Thank you.
$175 USD in 7 days
6.8
6.8

Hi, I am excited about the opportunity to create the Magisk module for the Xiaomi Redmi 6 to enforce audio routing through the wired headset jack. With extensive experience in Android audio policy and Magisk modules, I can ensure a seamless experience for SIP and SIM calls, optimizing routing and disabling DSP features as required. My past projects involved similar audio routing challenges, where stabilizing input and output devices while maintaining clarity was crucial. I will implement the necessary overrides in the audio policy configuration files and ensure that all tests, including the activity of SIP apps and the integrity of wired audio output, are thoroughly validated. I propose utilizing Anydesk for remote collaboration during the testing phase, aligning with your specific requirements. I aim to deliver a functional prototype within three days and to assist with the implementation of the module for additional devices if testing is successful. Thanks,
$200 USD in 3 days
5.7
5.7

Hi, I understand you need a Redmi 6 Magisk module to route SIP ⇄ SIM audio through the wired jack with DSP fully off. I’ve built systemless audio-routing modules for rooted Xiaomi devices, so I can handle this end to end. What I’ll deliver: - A standard Magisk module (SIP_SIM_JackOnly) with vendor overrides to force the 3.5 mm jack as the sole input/output. - Overrides for audio_policy and audio_effects to disable AEC/NS/AGC and silence DSP. - Boot-time enforcement: disable BT, prefer wired headset, optional audioserver restart, watchdog. - Validation: dumpsys audio before/after, SIP app and SIM call tests, no speaker routing. Availability: can start immediately; first version in ~3 days. Remote testing via AnyDesk on a Redmi 6. Do you have a preferred test SIP app and a plan for validating the loopback with the provided diagram? Thanks,
$100 USD in 3 days
4.1
4.1

But operating your Magisk Project would be a breeze! I might not have a Redmi 6 currently but my unparalleled skillset and keen understanding of Android audio engineering are exactly what you need to create the Magisk module for SIP-SIM Audio Bridge. With over 7 years of experience as a Senior Full-Stack Engineer, I've built robust web and mobile applications, with in-depth knowledge of rooting & systemless modules like Magisk. I appreciate your clarification that the job doesn't require physical loopback cable designs but rather software enforcement. Given my substantial experience with rooted Xiaomi devices and Qualcomm audio stacks, I'm confident that I can deliver the project to your satisfaction through remote means using Anydesk to ensure effective coordination.
$150 USD in 3 days
4.2
4.2

With my decade-long experience as a professional Web and Mobile App Developer, I can confidently say that I tick all of the boxes in your technical requirements. My advanced knowledge of Android audio policy & routing and rooted device debugging, makes me an ideal candidate for your project. Notably, I have hands-on experience with Magisk systemless modules, exactly what you need for effective Audio Routing. Moreover, during my career, I have thrived on completing complex projects in time-pressured situations without compromising quality. This aligns perfectly with your project's requirement of swift implementation as you are apparently determined to optimize the use of the Magisk module on at least 200 Redmi 6 phones after a successful test. Adapting to unique project conditions is one of my core strengths as I was assigned projects that required remote working via Anydesk like we would be doing. To be more assured of my candidacy, let's consider my work on Shop2Door's stock management system where stability was prioritized over elegance and ensured no loss in data even under tech failure. Similarly, in building your Magisk module for SIP ⇄ SIM Audio Bridge (Jack-Only), I will ensure stability triumphs over anything else. Partnering with me means guaranteeing three things: prompt delivery, clean code and effective and timely communication throughout
$40 USD in 2 days
0.0
0.0

Hello, thanks for posting this project. Your requirements are clear and align with my background in Android audio routing, low-level configuration, and Magisk module delivery. I’m experienced in systemless modifications for Xiaomi devices and proficient at remotely debugging with dumpsys, logcat, and audioserver tools. I can prepare your Magisk module to systemlessly force all audio routing and DSP intervention exactly as described, using your Redmi 6 over AnyDesk for real-time validation and teamwork. I am confident I can deliver your working prototype, assist with the remote loopback testing, and prepare documentation for future deployment to a large device fleet. I look forward to collaborating on this telecom bridge solution. Warm regards, Vitalii
$140 USD in 1 day
0.0
0.0

THIS IS NOT THE AUTO BID, PLEASE REVIEW IT IN DETAIL I’ve reviewed your project and understand you’re looking for a Magisk module to manage SIP and SIM audio routing exclusively through the 3.5mm wired headset on the Xiaomi Redmi 6. My background in Android audio policies and Magisk module development ensures I can create a solution that meets your requirements while disabling all DSP effects that can interfere with the audio loopback. I’ll provide a comprehensive testing plan along with systemless configuration files to validate that audio pathways are appropriately routed. I propose an initial version delivered within three days for timely testing and refinement. What specific SIP app do you plan to test for compatibility? Sincerely, Ibad
$50 USD in 1 day
0.0
0.0

Hey , I just finished reading the job description and I see you are looking for someone experienced in Mobile App Testing, Android App Development, System Administration, XML, Audio Engineering, Mobile Development, Android SDK, Android and Mobile App Development. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further.
$30 USD in 1 day
0.0
0.0

Greetings, I see you're looking to create a Magisk module that routes all SIP and SIM audio through the wired headset jack for the Xiaomi Redmi 6, while completely disabling DSP. This sounds like a fun challenge! My approach would involve carefully modifying the audio policy configuration and effects files to enforce this routing, ensuring that audio is only sent through the wired headset and not through any other outputs like the speaker or Bluetooth. I have experience with Android audio policies and working with Magisk modules, which will help me tackle this project effectively. I understand the importance of thorough testing to confirm that audio remains routed correctly, so I’d ensure to validate the setup with your SIP server and the loopback audio jack. Could you share more about the SIP client you'll be using for testing? Best regards,
$85 USD in 2 days
0.0
0.0

Hi, I’ve worked on projects like this before, so what you’re describing makes sense to me. And I'm really interested in this project - Redmi 6 Magisk Audio Routing #2. I usually focus on getting things done cleanly and making sure they work properly in real use, not just on paper. I’m comfortable either improving an existing setup or helping build something new, depending on what stage you’re at. I keep communication straightforward, share progress along the way, and flag issues early so there are no surprises later. If you want, you can share a bit more about the current setup or the goal you’re trying to reach, and I can let you know how I’d approach it. Thanks, Jesse
$200 USD in 7 days
0.0
0.0

Hello, How are you? I have checked your job description and I’m confident I can complete exactly what you need. I have extensive experience with Magisk modules, Android audio policy, and sound routing for rooted devices. I am well-versed in working with configurations to ensure that audio exclusively flows through the wired headset jack without any DSP interference. My approach will adhere strictly to your project standards, focusing on disabling unnecessary audio outputs and ensuring seamless routing during SIP and SIM calls. I will also provide detailed documentation and support for the implementation on multiple devices post-testing. Please send me a message so that we can discuss more. Thanks.
$155 USD in 1 day
0.0
0.0

Hi there, I understand the complexity and technical requirements of your project for developing a Magisk Module for SIP ⇄ SIM Audio Bridge on Xiaomi Redmi 6 devices. With my expertise in Android audio policy, Magisk systemless modules, and rooted device debugging, I am confident in delivering a solution that meets your objectives. I will create a Magisk module that enforces audio routing through the wired headset jack only, disabling DSP for seamless TRRS loopback audio bridging. My approach will include modifying the necessary config files, enforcing boot-time settings, and ensuring compatibility with SIP apps. To remotely test the solution using AnyDesk and a Redmi 6 connected to it, I will follow the outlined validation steps with a SIP server and client setup. Upon successful testing, I will provide clear documentation for implementation on 200 Redmi 6 phones. Let's collaborate to achieve your goal of stable audio routing during SIP ⇄ SIM calls without DSP interference. Looking forward to working together on this project. Ihsan Faridi
$140 USD in 7 days
0.0
0.0

Hey , I just finished reading the job description and I see you are looking for someone experienced in Mobile App Testing, Mobile App Development, XML, Audio Engineering, Android, Android SDK, System Administration, Mobile Development and Android App Development. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further. Regards, Salik.
$30 USD in 6 days
0.0
0.0

We’ve delivered similar projects and understand how to build this efficiently, cleanly, and without overcomplicating things. Your need to force all SIP and SIM call audio exclusively through the 3.5 mm wired headset jack, disabling DSP and deprioritizing other outputs, requires a clean, seamless, and fully integrated Magisk module with boot-time enforcement and reliable audio routing. Our expertise includes Android audio policy, Magisk module development, and rooted device debugging specific to Xiaomi/Qualcomm stacks. While I am new to freelancer, I have tons of experience and have done other projects off site. I’m confident we can meet your 3-day timeline and handle remote testing via Anydesk effectively. I would love to chat more about your project! Regards, Dylan Rheeder
$200 USD in 14 days
0.0
0.0

Hello, As an experienced, versatile freelance developer, I have the technical expertise and a unique value proposition that aligns perfectly with your project objectives. My Android app development skills combined with an in-depth understanding of audio engineering and Magisk systemless modules uniquely position me to deliver the quality and secure solution you seek. I may not have a Redmi 6 on hand, but I am confident in my ability to navigate around this using remote technologies like AnyDesk to connect with your device. Collectively, my 5+ years of experience make me a thorough professional within the tech industry. From Fullstack Web Development, Mobile App Development (Android, iOS, Flutter) to Cybersecurity & Ethical Hacking, my diverse skillset has been cultivated to provide end-to-end solutions. I command a range of programming languages such as PHP, JavaScript, HTML5 and also have experience in system setup for security like pen-testing to provide stable local and production environments. Moreover, what sets me apart from other developers is my dedication to delivering top-tier results without compromising on quality or security. With every aspect of your project skillfully addressed and a clear line of communication maintained at all times, choosing me for your project ensures not only timely delivery but also a product perfected on multiple fronts. Let’s not wait longer! Let us commence on this innovative venture together! Thanks!
$250 USD in 5 days
0.0
0.0

I’m okay working with project milestones and completing each task carefully before moving to the next stage. I follow instructions well and always aim to deliver on time. I’d be happy to discuss the details of the milestones. Thank you.
$200 USD in 7 days
0.0
0.0

Hi , I’ve carefully reviewed your job post and it’s clear you’re looking for someone with solid experience in Mobile App Development, Android, Mobile Development, XML, Audio Engineering, Android SDK, Android App Development, System Administration and Mobile App Testing. This is exactly within my core expertise, and I’m confident I can deliver reliable, high-quality results. Rather than rushing into assumptions, I prefer to understand the project properly. I’d appreciate your clarification on a few points: Is the job description complete, or are there additional requirements or expectations? Do you already have any work completed, or will this be built entirely from scratch? Do you have a preferred timeline or deadline in mind? Why you can confidently work with me: Successfully completed 250+ major projects across different industries Maintained 100% positive feedback over the last 5–6 years Earned 100+ recent 5-star reviews, showing long-term client satisfaction I focus on clear communication, clean execution, and on-time delivery I work as a full-time freelancer and am available 9 AM – 9 PM (Eastern Time), ensuring fast responses and consistent progress. Due to client confidentiality, I share relevant work samples only in private chat. Let’s start a conversation so I can show you similar work and suggest the best approach for your project. Looking forward to working with you. Best regards, Arsalan Khan
$30 USD in 2 days
0.0
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I specialize in Magisk-based Android audio routing and DSP disabling on rooted devices. I can deliver a systemless module that locks SIP & SIM audio to the wired headset jack only, with full validation via dumpsys audio and live SIP↔SIM testing. Happy to work remotely via AnyDesk and prep the solution for 200-device rollout. Regards.
$140 USD in 7 days
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