How to apply effects to audio that is streamed via Apple Music

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Summary When engineers face DRM-restricted audio streams from Apple Music via MusicKit, they encounter a fundamental limitation: no direct audio URL access for AVFoundation manipulation. This prevents applying real-time effects like pitch shifting and reverb through traditional pipeline approaches. The workaround involves intercepting system audio output through privacy-compliant screen recording capture rather than direct stream … Read more

Advices for parsing OCLs

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Summary In this postmortem, we analyze the risks of exposing OCL (Object Constraint Language) expressions directly to a web API, as suggested in the query. The core issue is that unvalidated OCL can lead to security vulnerabilities like unauthorized data access and performance issues such as denial-of-service (DoS) via expensive queries. MDriven does provide hooks … Read more

create_access_token() takes 0 positional arguments but 1 was given

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Summary The error create_access_token() takes 0 positional arguments but 1 was given occurs when invoking the create_access_token function with an argument, despite the function being defined with `data: dict** as a keyword-only argument. This is due to a misunderstanding of how Python handles keyword-only arguments and the ****` syntax. Root Cause The root cause of … Read more

Why does cpp execute 2 different implementations of the same functions based on the ability to evaluate the result in compile-time?

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Summary This postmortem dissects a subtle C++ library implementation detail: std::find selects different algorithms based on constexpr evaluability. In the provided code, std::ranges::find performs a compile-time literal string comparison when searching for “–runtime” (a known constant), but switches to a runtime pointer comparison when searching for getenv(“RUNTIME”) (an unknown runtime value). This variance is not … Read more

Suspicious opened port on Android 15

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Summary An open TCP port (6100, 6300, or 6600) appears on a Samsung Galaxy S21 running Android 15/One UI 7.0. The port is owned by the Android System (UID 1000), persists across reboots, survives app force-stops, and serves Synchronet DB traffic. This is a legitimate system service, not malware. The service is likely part of … Read more

Calculating a Percent with a Filter on Text Dates

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Summary The issue at hand is calculating a percentage using SQLite with a filter on text dates. The expected result is 31.39, but the actual result is 318.58 or 0.0 when attempting to round to two decimal places. The key takeaway is that the calculation involves integer division, which is the root cause of the … Read more

What is the weaknesses and strengths my nodejs project

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Summary The project is a forum-discussion API built with Node.js, Express, and MongoDB. It implements a RESTful API for managing forums, threads, posts, and user authentication. The core strengths lie in its modern event-driven architecture and MongoDB’s schema flexibility. However, the primary weaknesses involve vulnerability to NoSQL injection, potential race conditions in concurrent post updates, … Read more

Does Move to/from Control Registers ignore the field mod?

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Summary This postmortem investigates the behavior of x86 MOV instructions to and from control registers (CR0-CR7) when the ModR/M byte’s mod field is not 11 (register-to-register). The instruction in question is 0F 20 /r (MOV r32, CRn) and 0F 22 /r (MOV CRn, r32). The investigation concludes that encoding with mod < 3 is architecturally … Read more

Tokenizer configuration – MLX

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Summary The issue at hand is related to incorrect tokenization when loading a model on MLX and using its tokenizer. This is due to an incorrect regex pattern in the tokenizer configuration. To resolve this, it’s essential to set the fix_mistral_regex flag to True when loading the tokenizer. Root Cause The root cause of this … Read more

QML Module not installed (C++ backend)

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Summary The issue at hand is that a C++ backend class with a QML_ELEMENT macro is not visible to App.qml, despite adding qt_add_qml_module to CMakeLists.txt. This suggests a problem with the QML module installation. Root Cause The root cause of this issue is likely due to: Incorrect CMakeLists.txt configuration Missing QML module installation Incorrect import … Read more