22-Mar-2017, 19:04
29-Mar-2017, 00:43
(22-Mar-2017, 19:04)K4680 Wrote: [ -> ]First: Off for MQA at HighResAudio
http://www.highresmac.de/vorerst-aus-fue...hresaudio/
http://www.highresmac.de/mqa-mehr-audiophiler-quatsch/
Over the years we have had so many discussions on Lossless vs un-compressed such as the FLAC vs WAV discussions. It took quite a while for some to come to terms that music could be compressed and subsequently de-compressed with no data loss.
Those of us were use to lossless compression in communication and data systems so no problem understanding the algorithms being used.
MQA is Lossy which means, data is being changed from the original recordings. I don't care what anyone says, that is not the original file for which I want to put my money. I have a challenge understanding why any owner of a Devialet would want to embrace MQA. We searched and now have, an amp, DACs and a system that delivers as true a representation to the original recording that I can hear.
We now have companies that have paid the royalty fee for MQA who have made it a feature in their players to compress incoming audio sources to MQA adding in more "data" by dithering and bit destruction and rebirth that is totally un-necessary in my humble opinion.
To save bandwidth in streaming is their argument. Perhaps 2-3 years ago when this was first proposed but today, networks are more than capable of handling the streams.
Pushing MQA down our throats is just a swarmy marketing play. My .02 cents.
Bob
29-Mar-2017, 01:29
It's all about the blur (or de-blur). So they say....
You'll never be able to listen to your smeary old highres lossless files ever again.
You'll never be able to listen to your smeary old highres lossless files ever again.
29-Mar-2017, 07:47
(29-Mar-2017, 01:29)Hifi_swlon Wrote: [ -> ]It's all about the blur (or de-blur). So they say....
You'll never be able to listen to your smeary old highres lossless files ever again.
This all blur and de-blur is just BS for anyone who knows the theory behind PCM, PCM reconstruction and general signal processing.
The time resolution of a PCM properly reconstructed is 1/ ( 2 pi bandwidth number_of_levels).
So even a 44.1/16 red book CD is having a temporal resolution of 100ps, which is already much lower than the needed resolution alleged by the MQA paper themselves.
a 192/24 is having a 0.1 femto second resolution ......
For having an idea of what we are talking, 100ps corresponds to a change of position of 34 nano meters given the speed of sound.... so I hope that MQA comes with a contraption holding your head stile, stoping your breathing, compensating the factory deviations of your speakers etc...
So, compared to the original PCM file, MQA has no interest and is only lossy. Maybe euphonic, but it is lossy.
Its interest comes for streaming, if the lossy reconstruction of MQA from a high-rez file is better to the ear than the corresponding 44.1/16, then MQA can transport higher frequency information than 44.1/16 with the same bit-rate.
So I fully agree with Bob, unless used for streaming to reduce the bit rate, the main value of MQA that I can think of is for Meridian... not for anyone else in the chain.
Jean-Marie
30-Mar-2017, 03:48
03-Apr-2017, 20:32
