Yes this is what happens with a 24bit/48kHz pcm :
- Mqa version was made
The 24/48kHz pcm is reduced to a 15/48kHz file. One bit is added to show "mqa" and "48" on the dac display, and 8 bit are used .... to store frequencies above 24kHz*
*For 48kHz files there are NO frequencies above 24kHz as by Nyquist the max frequency recorded is half sample rate (48kHz/2 = 24kHz max)
So what mqa just did here is reduce the 24 bit file to a 15bit one ! Downgrading quality for nothing.
2. The 16/44 pcm version on Tidal ... is corrupted mqa !!!
One would expect the 16/44 pcm version to be a downsample of the original 24/48k pcm, BUT this is not what Tidal puts online. No... The pcm on Tidal is reduced from the mqa !!!
From the 24/48k mqa every third (empty) byte is removed.
The resulting 16/48k mqa is then downsampled to 16/44k corrupting the mqa signal bit.
The dac will show "pcm 44.1" when you play this.
So this is a 15/48 pcm together with the 1 signal bit of mqa downsampled to a 16/44 file.
This is a mess !
The end users sees "pcm 44" on his dac and believes he is listening to a lossless version.
(A downsample from the original 24/48 pcm). But he is NOT. He is listening to a corrupted mqa. Worse, when he plays the mqa he might even start to believe mqa DOES sound better then the original pcm, but he's just hearing that the mqa sounds better... then the corrupted mqa version.
This is how Tidal/Mqa marketing works.
Want to compare mqa with pcm?
Go listen to the pcm versions on Qobuz, Deezer, Amazon HD, anything but Tidal.
P.S. If the pcm put on Tidal has a frequency of x44k (44 88 176 352)
The mqa comes in a 24/44 flac. The hifi pcm version will be a 16/44 flac.
Since the mqa signal was NOT damaged here, the dac will still show "mqa xxx" when playing the pcm version. However, since it's 16 bit now, it will no longer unfold.
Mqa is such a mess.