Convert MPEG Audio Layer 2 (.mp2) to Advanced Audio Coding (.aac) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .mp2 file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .aac file when it's ready.
Converting MP2 to AAC upgrades broadcast audio from the MPEG-1/2 Layer 2 codec to its designated successor. AAC was explicitly designed by the MPEG committee to replace all three MPEG Audio Layers (MP1, MP2, MP3) with superior compression efficiency. The conversion moves audio from broadcast infrastructure to consumer distribution format.
MP2 at 192-256 kbps provides solid broadcast quality. AAC at 128 kbps matches or exceeds this quality in a format supported by every modern device, browser, and streaming platform. The conversion simultaneously improves compatibility and often reduces file size.
MP2 has excellent broadcast infrastructure support but poor consumer device support. Most smartphones, tablets, and web browsers do not include dedicated MP2 decoders. AAC is universally supported — converting MP2 to AAC makes broadcast content accessible to consumer audiences.
Streaming platforms and podcast directories require AAC or MP3 for submission. Converting MP2 radio or television audio to AAC is the standard step for republishing broadcast content as podcasts, streaming audio, or web media.
FFmpeg decodes the MP2 subband audio (32 subbands with scale factor selection and psychoacoustic model) to PCM, then encodes to AAC using the native aac or libfdk_aac encoder. MP2 broadcast audio typically uses 192-384 kbps stereo at 48 kHz. AAC at 128-192 kbps captures the full broadcast quality. The AAC encoder's advanced transform coding and temporal noise shaping produce better quality per bit than MP2's simpler subband approach.
AAC at 128 kbps matches MP2 at 256 kbps — the codec is roughly twice as efficient. At 192 kbps AAC, the output exceeds what any MP2 bitrate can deliver. This means converting from broadcast MP2 to consumer AAC can actually reduce file size while maintaining perceived quality. For critical broadcast content at 384 kbps MP2, use 192 kbps AAC to ensure full quality capture.
| Device | MP2 | AAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
MP2 to AAC is the standard broadcast-to-consumer conversion. AAC at 128-192 kbps fully captures MP2 broadcast quality in a universally playable format.
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| No |
| ฟีเจอร์ | MP2 | AAC |
|---|---|---|
| ชื่อเต็ม | MPEG Audio Layer 2 | Advanced Audio Coding |
| นามสกุล | .mp2 | .aac |
| เหมาะที่สุดสำหรับ | Broadcast standard | Superior to MP3 |