I am relatively new to piano and looking to invest in a digital piano or keyboard with weighted keys that I can tune to 432 hz. One more thing I have noticed that I sing better in lower octaves. So is there a piano with 88 keys that'd replace the higher most octave with one lower?
Any decent digital piano these days can be tuned any way you want, shift octaves, split the keyboard in two or more sections, etc.
What instead changes quite a bit from one model to the next is the quality of the weighed keys system, and secondarily, the quality of the internal sound samples.
Therefore, if it were for me, I would want to personally try the touch of as many different models as possible, and that would be my main criterion of choice. Everything else, i.e. everything digital rather than mechanical, these days can be easily customized in any way you want.
No need to spend as much as $1000!
If you have a Mac, I would recommend investing in a decent MIDI keyboard (prioritizing touch and feel), an audio interface, and software that allows you to use many different piano and keyboard samples.
- For the keyboard, I would visit a music store in person and try them out until you find one whose touch you like. At the $400 price point, you'll be able to find one with built-in speakers as well, so you can practice without plugging into the computer, too. If that doesn't matter to you, there are plenty of options in the $200 range.
- For the audio interface, I'd recommend the Focusrite Scarlett Solo, which runs about $120. You can also use this to record guitar, bass, or vocals if you want that.
- For software, the app GarageBand has plenty of samples built in, so you try using that first and see if it doesn't satisfy you. If you want more sounds, Mainstage is basically just the Logic sample library without the production capabilities, and it costs $30. The full Logic program runs $200, and I think it's overkill for your purposes.
Total cost: about $400-600, and you have a rig that you can upgrade piece by piece as your interests evolve.