This page tests seamlessly looping playback of a highly compressed 8kHz quality music clip. Files:

8bit_detective_44100hz_1411kbs_stereo_int16.wav: Downloaded from https://www.dl-sounds.com/royalty-free/, license: https://www.dl-sounds.com/license/
8bit_detective_8000hz_128kbs_mono_int16.wav: Converted from 8bit_detective_44100hz_1411kbs_stereo_int16.wav with Audacity 2.1.3 Win64
8bit_detective_8000hz_14kbs_mono.ogg: Converted from 8bit_detective_8000hz_706kbs_mono_int16.wav with Audacity 2.1.3 Win64, with option Quality: 0
8bit_detective_8000hz_11kbs_mono_ffmpeg2.2.2_aac.m4a: Converted from 8bit_detective_44100hz_1411kbs_stereo_int16.wav with Audacity 2.1.3 Win64 + FFmpeg 2.2.2, with option Quality: 10
8bit_detective_8000hz_8kbs_mono_lame3.99.mp3: Converted from 8bit_detective_44100hz_1411kbs_stereo_int16.wav with Audacity 2.1.3 Win64 + Lame MP3 encoder 3.99.3, with options Bit Rate Mode: Average, Quality: 8 kbps, Channel Mode: Force export to mono

Play uncompressed (Web Audio + AudioBufferSourceNode + decodeAudioData() to AudioBuffer):

Play compressed (<audio> element playing a Blob embedded as MediaElementAudioSource to Web Audio graph):

Current memory usage: 0 bytes.