8 Core Pillars of Professional Audio Conversion on Mac

Everything from streaming music format conversions to video soundtrack extraction, ringtone trims, and 8-thread batch processing.

Mainstream Streaming Format Conversion

Directly converts proprietary formats from QQ Music (.mflac, .mgg) and NetEase Cloud Music (.ncm) into standard MP3 and lossless FLAC, ready for car stereos and portable DAPs.

Universal Audio Input Support (17+ Formats)

Accepts virtually all audio formats: MP3, NCM, MFLAC, MGG, M4A, M4R, WAV, AIFF, FLAC, AC3, AAC, OGG, CAF, AMR, MP2, APE, WMA, and more.

Direct Audio Extraction from 4K/HD Videos

Easily extract pure audio tracks from MP4, MOV, MKV, M4V, AVI, WMV, WEBM, FLV, TS, and more without opening bulky video editing software.

Rich Audio Output Formats (12 Formats)

Export to MP3, M4A, M4R, WAV, AIFF, FLAC, AC3, AAC, OGG, CAF, AMR, MP2 with pristine acoustic fidelity and zero quality loss.

Granular Audio Parameter Customization

Fine-tune sample rates (8kHz to 192kHz), bitrates (up to 320kbps / lossless), stereo/mono channels, and smooth audio fade-in & fade-out durations.

Up to 8 Parallel Concurrency Tasks

Fully unleashes Apple Silicon hardware multi-core performance. Convert dozens of songs in parallel simultaneously in seconds with customizable concurrency.

Visual Waveform Cutter & iPhone Ringtone Maker

Integrated audio player and millisecond-accurate waveform editor. Effortlessly preview, trim clips, add fade transitions, and export iPhone .m4r ringtones.

Sequential Audio Merger & 100% Offline Privacy

Drag and drop multiple voice recordings or podcast chapters to merge them sequentially into a single file. 100% local offline conversion guarantees zero cloud leakage.

AConverter Waveform and Ringtone Trimmer

Visual Waveform & Ringtone

Music Platform Format Conversion & Universal Video Extraction

Unlock QQ Music (.mflac/.mgg) and NetEase Cloud (.ncm) songs to standard MP3/FLAC for your car audio system. Extract crystal-clear soundtrack from 4K movies and YouTube videos in seconds.

Unlock NetEase (.ncm) and QQ Music (.mflac/.mgg) to standard audio
Extract lossless audio tracks directly from MP4/MOV/MKV without rendering
Fully compatible with car audio systems, portable DAPs, and Apple devices

AConverter Batch Conversion and Concurrency

8-Thread Concurrency & Merger

Visual Ringtone Trimming, Audio Merging & 8-Thread Concurrency

Cut your favorite 29-second climax with smooth fade-in/fade-out for instant iPhone .m4r ringtones. Batch process hundreds of songs with 8 parallel threads or concatenate separate audio files seamlessly.

Up to 8 concurrent threads. Convert hundreds of lossless songs in minutes
Drag-and-drop sort to merge scattered voice recordings or audiobook chapters
Granular customization of sample rates, bitrates, channels, and fades

AConverter Technical Specifications & Supported Formats

Comprehensive compatibility across streaming, video soundtracks, and archival audio.

Input Formats (Audio & Video)

Broad Audio & Video Ingestion

Audio Inputs (17+ formats):

mp3, ncm, mflac, mgg, m4a, m4r, wav, aiff, flac, ac3, aac, ogg, caf, amr, mp2, ape, wma

Video Inputs (9+ formats):

mp4, mov, mkv, m4v, avi, wmv, webm, flv, ts

Output Formats & Audio Parameters

12 Target Outputs & Controls

Target Formats (12 formats):

mp3, m4a, m4r, wav, aiff, flac, ac3, aac, ogg, caf, amr, mp2

Acoustic Tuning:

Sample Rates: 8,000Hz to 192,000Hz (44.1kHz / 48kHz standard)
Bitrates: 64kbps to 320kbps and Bit-Exact Lossless
Channels: Stereo (2ch), Mono (1ch), and 5.1 Surround
Fade-In & Fade-Out Envelope (0.5s - 5.0s customizable)

Frequently Asked Questions

Q: Are my audio and video files uploaded to cloud servers?

Absolutely not. AConverter executes 100% of transcoding, video extraction, waveform trimming, and concatenation locally inside your Mac's Apple Silicon/Intel hardware. No internet connection is required, ensuring zero cloud leakage for private recordings.

Q: Why can't my car stereo play downloaded NCM, MFLAC, or MGG files?

These extensions are proprietary packaged formats designed only for their respective desktop apps. Standard car audio stereos and Hi-Fi DAPs lack the proprietary decoders. AConverter converts them directly into standard 320kbps MP3 or lossless FLAC files ready for USB playback.

Q: How do I apply the exported .m4r file as my iPhone ringtone?

It's seamless. The exported .m4r file matches iOS specifications. Connect your iPhone to your Mac via cable, open Finder, click your iPhone in the sidebar, and drag the .m4r file directly into the device window. Then head to iOS Settings > Sounds & Haptics > Ringtone to select it.

Q: Does 8-thread batch conversion cause system lag or overheating?

Not at all. AConverter is optimized for Apple Silicon performance and efficiency cores. Even under full 8-thread concurrency, RAM usage stays around tens of megabytes, converting each song in just 1-2 seconds quietly in the background without stuttering.

AConverter