Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM

Table 4

Summary noise and distortions scores: ACER low, ACER medium, and ACER high (n = 68). A score of 1 represents imperceptible noise and distortions and a score of 5 represents perceptible noise and distortions.

Song	ACER Low		ACER Med		ACER High
	Mean	SD	Mean	SD	Mean	SD
Uptown Funk	2.53	1.42	2.57	1.23	2.86	1.29
Elastic Heart	3.29	1.51	2.65	1.36	2.66	1.15
These Days	2.89	1.45	2.45	1.24	2.69	1.37
Heroes (We Could Be)	3.46	1.34	3.31	1.29	2.96	1.31
When the Beat Drops Out	2.30	1.23	2.28	1.18	2.23	1.13
Dangerous	3.29	1.36	2.73	1.35	2.77	1.38
GDFR	2.39	1.19	2.36	1.27	2.43	1.32
Doing It	2.85	1.39	2.77	1.34	2.80	1.29
Make Me Feel Better	2.64	1.42	2.43	1.36	2.53	1.40
What Kind of Man	2.68	1.33	2.58	1.35	2.46	1.33
Grand Mean	2.83	1.36	2.61	1.30	2.64	1.30