Category Archives: Audio Processing

Introducing a new up-sample filter: NOS-SRx

Posted on May 16, 2021 by Mr Apodizer

Almost 10 years ago I released the Revelation One filter, a serious improvement over Meridian’s apodizing filter (which they are still using today and on which the time correcting aspect of MQA is based). But even my RevOne filter turned … Continue reading →

Posted in Audio Processing, Firmware, Meridian, Soundquality | 4 Comments

Support Revelation One on HD621

Posted on January 9, 2020 by Mr Apodizer

I have added support for Revelation One on the HD621. When I released the Revelation One filter (8 years ago) I have also tried to support the HD621, but I could not find the upsample filter in the firmware. Sometime … Continue reading →

Posted in Audio Processing, Firmware, Meridian | Leave a comment

Concerns about sound quality MQA

Posted on February 27, 2018 by Mr Apodizer

Since I have the MQA decoder working with my Logitech Media Server, I have been listening to a selection of albums that I also have in CD format. I noticed 2 things: There are a lot of albums in MQA … Continue reading →

Posted in Audio Processing, MQA | Leave a comment

MQA decoder for Logitech Media Server

Posted on February 21, 2018 by Mr Apodizer

Wow, time is going quickly. It is already 3 years since my last post, and it did definitely not feel that long. Last year MQA finally took off. In the beginning of 2017 Tidal started streaming MQA under their ‘Masters’ … Continue reading →

Posted in Audio Processing, Logitech Media Server, Meridian, MQA | 5 Comments

MQA – Further explained

Posted on February 9, 2015 by Mr Apodizer

Sometimes things are simpler than you think. Also sometimes you have all pieces of the puzzle and you still do not see the big picture. MQA seems to fall into this category.

Posted in Audio Processing, Meridian | 5 Comments

MQA – What is Meridian hiding?

Posted on January 13, 2015 by Mr Apodizer

I have been doing a lot of reading these last few weeks. There is quite some discussion on fora and audio news sites on Meridians latest invention called MQA. But what is MQA exactly and what is Meridian not telling … Continue reading →

Posted in Audio Processing, Meridian | Tagged | 6 Comments

New service: Create CD master using Revelation One filter

Posted on May 21, 2014 by Mr Apodizer

The Revelation One filter can not only up-sample, as it is used in its default application, but it can also down-sample. This way it can be used to create a CD master from the original studio master. We already tested … Continue reading →

Posted in Audio Processing | Tagged , | Leave a comment

Dynamic Resolution Enhancement (Update)

Posted on September 23, 2013 by Mr Apodizer

After my initial success with Dynamic Resolution Enhancement (see this post) it proved to be more difficult than anticipated. With some albums it worked great, but with most it gave issues. After a lot of testing and improving the program … Continue reading →

Posted in Audio Processing, Dynamic Range, Loudness War | Leave a comment

WiP: Dynamic Range Enhancement

Posted on February 14, 2013 by Mr Apodizer

This post is just to let you know what I am working on for some time. Today I got the very first version of a new project working. As you probably know the biggest problem with nowadays recordings is compression … Continue reading →

Posted in Audio Processing, Dynamic Range, Loudness War | 5 Comments