Arduino-Teensy-Codec-lib

Audiolibrary plugin, plays up to 320 kbps MP3, MP4(AAC), M4A(AAC), AAC-Raw or FLAC in software without external hardware - with only 48MHz.

• Optimized for ARM Thumb2.
• Play from SD, built-in Flash or optional serial Flash (with audio-shield)
• Flac 4-24 BIT, (Teensy <= 3.2: Blocksize 128-1024 Bytes)

planned:

• OPUS decoder (new codec, the best so far. Great Specs.) http://opus-codec.org/comparison/
• streaming audio

HINT: -O2 gives much better performance

TODO:

• detect APE-header
• parse ID3 / APE / MP4 for extended information
• ogg vorbis (?)

not possible: SBR (aac-HE (low bitrate)) - (not enough ram).