My review of Apple Lossless compared to Tidal and Apple Music AAC.
I've been a subscriber to Apple Music since I got the original HomePod, a subscriber to Tidal Premium (HiFi+ now) since last year.
First a brief review of HomePod with Apple Music. HomePod as a single speaker isn't bad, it plays music loudly with good bass, no distortion (as in bass bleed/bloom) and you can hear instrument separation. But otherwise it's a decent speaker for a mono speaker. As a stereo pair it does sound a lot better since it's stereo, but I haven't had a stereo pair in years so I can't say much more about it. As for Siri, it's terrible, but it works for my needs.
When Lossless came out for the HomePod a few months back, I tried a few songs to test it. And I have to say it does sound better in the treble and bass. I felt that cymbals on AAC track felt muddy, and overall presentation can sound like a wall of sound as a mono speaker, but with Lossless it now reminds me of CD playback where each instrument sounds clear (for what the HomePod can resolve), bass is a little bit clearer. Midrange I can't tell a difference (since AAC is optimized for good midrange) but overall I am lot more satisfied listening to the HomePod with lossless than with AAC. Mind you, AAC is a pretty good format. I've enjoyed my iTunes collection for many years without feeling like I am losing a lot of detail on my IEMs, but on the HomePod, lossless just feels like my old CD players with speakers, but better.
Tidal using the Topping D90SE/A90 stack, using Drop 6xx, Drop HfM 5xx, and HD Poseidon.
I've used Tidal on my 2019 MacBook Pro over the last year and I found that MQA sounds different from hi-res or CD masters of the same album. I was never amazed with it but it sounded ok. Using a program like Audirvana or the pi2aes Pi-Hat on Rpi4 did make the sound better for Tidal, but using Tidal by itself on a playlist that is mostly MQA wasn't that interesting when listening passively. Only when I used Audirvana or a pi-hat was I tapping my feet or rocking my body to the music.
When Apple Lossless came out, I did quick comparisons and I was amazed how much better Apple Lossless sounded compared to Tidal using exclusive mode, so I think there's a real problem with the Tidal software player.
Recently I got a HarmonicDyne Poseidon and have been listening to some songs on it. I've decided to listen to Pink Floyd's The Dark Side of the Moon on it the other day because that's an album I've been listening to since I was young teen which is roughly 30 years. Tidal recently updated DSotM to use MQA (192khz) instead of FLAC and I listened to the whole album at night. I found that Tidal master had quite a bit of soundstage for the instruments, especially for the choir in some songs, but the vocals sounded a bit thin. Separation of instruments was pretty decent, and overall it felt like listen to a fresh presentation of the CD.
Then I listen to the Hi-res version of DSotM on Apple Music lossless. It seems that Apple also has a new master as well, certified as an Apple Master (24 bit/96khz). I found that while it didn't have the soundstage of the Tidal master, vocals were a lot more richer, which made the songs that have choir singers (Brain Damage, Eclipse, etc) feel more impactful. Instruments had more presence, like the sax in some songs. I liked the Apple version a lot more.
Overall, the Apple Music master had the emphasis and emotion that I wanted compared to the more separate and analytical(?) Tidal master.
As for the UI of Apple Music vs Tidal, I like tidal more. Apple Music needs to make lossless outside of the iPhone/IPad/Music App and make it available via third parties so something like Roon/Audirvana/volumio can stream it but it's nice that Apple Music sounds good without locking the sound interface. Imagine how much better it can sound if it could...