Hi,
maybe this is a dumb question but when tuning bass and bass drum do I have to play just the same note using the bass?
If bass and Kick play at the same time they wouldn’t be in tune anymore or does the kick gets tuned according to the notes the bass is playing?
I think it depends of the work frequency of your kick. If it too high and decay time is long, kick becomes a tonal sound. So you have to keep attention to it’s tuning. In this case you can turn pitch down or decrease sweep time or make decay shorter.
Depends on the function of the kick. If you have a 808-style kick with a long body then yes, you have to be careful with your bass notes, avoiding minor seconds and such. Octaves, thirds, fourths, fifths are fine.
Conversely, the shorter the body of the kick, or if it has a pitch ramp - the more free you are with your bassline.
I think it’s ever recommended to tune your kick (you will sometimes tweak it so decay becomes longer). It takes not a long time.
As of now i will do what i recommend 
It’s really up to you and there are a number of approaches you could take.
I often have the tonal part of a bass drum in the sub frequency range and tune it to the tonic/key note of the track ie. in the key of A the sub would be tuned to A1 (55hz), then I’ll have the bassline an octave up (A2 = 110hz) and it can play whatever it likes in the key of A and sound fine.
Avoid having the bassline and body of the kick drum in the same octave, it’ll just make a mess.
Also, try filtering off the frequencies of your kick. I generally like to roll of any frequencies below 40, and just a tickle of FilterQ. This will give your bass room to live without constantly battling the kick, and makes everything sound cleaner, clearer, and louder.
This works until you compare your track to one with properly mixed subs on a good system. But of course, not all music needs sub frequencies
40hz is plenty subby enough.
Unless you have a sub bass with a fundamental lower than E1/41.2hz (and that’s pretty low) you really don’t need energy there that’ll just be muffled rumbling and lower the volume of your entire mix by taking up energy that could be used elsewhere.
Also remember that filters roll-off rather than straight up cut at your selected frequency so having a cutoff at 40hz won’t remove all the content below there anyway. Brickwall filters give you an unwieldy resonance bump at the cutoff frequency and sound unnatural.
Thanks for your answers 