timmillea

The 'hi-fi' audio spec of 20Hz to 20KHz is there for good reason - it exceeds the human hearing range! The chances are that if you are over 20 you won't hear much at all over around 14KHz. 

The Nyquist theorem states that the digital sampling frequency must be at least twice the maximum analogue frequency to be reproduced. Because higher analogue frequencies sampled may lead to 'aliasing', i.e. lower frequency artefacts. a low-pass filter must be used at source. Hence 44.1 KHz was chosen for the CD standard - enough to reproduce audio up to 20KHz with a little room for (rather harsh) low-pass filters. 

Higher sampling rates are used for audiophile applications 1) in order to use less harsh low-pass filters when recording and 2) because of the timing difference between the ears. At 20Khz, the wavelength of sound is around 1.6cm. Although you may not be able to hear 20KHz, your brain can certainly determine a 1.6cm phase difference from a source - at all frequencies. Hence high-resolution audio is exactly that - not for the frequency range but for for the timing to the ears. 

24 bit is much like HDR. You need to listen to it at very high volume in a quiet room to appreciate any difference from 16 bit just as you need a display capable of great brightness in a dim room to appreciate it over SDR. Then no microphone is capable of 24 bit (144dB) signal-to-noise ratio so any audio created to take full advantage of the extra dynamic range is going to be somewhat contrived and artificial - much like HDR movies! 

I am not particularly impressed by the less than double performance increase c.f. the M1 with all the extra heat, noise and expense. I hope the M2 will fare better. It will have to to sell the new Mac Pro. 

I think we are witnessing the first product manifestation of the the departure of Sir Jony Ive. Steve Jobs would turn in his grave to see the reintroduction of 'legacy' ports and the greater heft. The new MBP seems like the product of focus groups rather than a clear design lead. I regard it as great engineering overall but the first clearly noticeable failure in design from Apple for two decades. It does not bode well for future products or indeed for Apple. Giving buyers what they want has never been Apple's way. They have historically been years ahead of that. 

I am dyslexic. I would be very interested if this app could help me. There is a single, one line claim, "Spritz also helps those with dyslexia as well". How? To what effect? Why? This is possibly the most significant claim made for Spritz yet is not supported, justified or expanded upon. Suspicions arise.