# MQA disappointing **URL:** \ **Category:** MQA\ **Created:** [May 31, 2018, 9:55pm UTC](https://community.roonlabs.com/t/mqa-disappointing/44057 "2018-05-31T21:55:13Z")\ **Posts on this page:** 1\ **Showing post:** 3893
**Author:** ![Wim\_Hulpia](https://community.roonlabs.com/letter_avatar/wim_hulpia/32/5_5575768a8748004e209b776fc1b2916d.png) [@Wim\_Hulpia](https://community.roonlabs.com/u/Wim_Hulpia)\ **Post date:** [March 25, 2021, 10:09am UTC](https://community.roonlabs.com/t/mqa-disappointing/44057/3893 "2021-03-25T10:09:38Z")
Found a comparison of pcm and mqa on reddit. It concludes that **mqa is nothing more than a minimizing filter being applied**. Something I’ve been telling here for quite some time. > [@Comparison of PCM and MQA](https://community.roonlabs.com/t/comparison-of-pcm-and-mqa/149787/156): > > A honest comparison between PCM and MQA : +1 Conclusion (last paragraph) All testing so far shows that MQA is nothing more than a minimum phase upsampling filter, which is arguably WORSE than a linear phase filter that most decent DACs or upsampling players will use as standard. MQA is 100% closed-source, and they go to great lengths to make it impossible to directly compare files that have not been altered. Most MQA content cannot be obtained in native HiRes anywhere. And they do not al… --- _[View the full topic](https://community.roonlabs.com/t/mqa-disappointing/44057)._