Arsthbt

In piano and any other instruments which produces musical notes, it seems the notes that matches the rap are never found.

But I think it can't be true, because after all there is some voice frequency at which the rap is done, so if we can copy those frequencies we can't produce the rap in a sound only form.

Is it that piano and music note producing instrumental don't have those frequencies, so we can't play (because piano etc have only 7 notes in different octaves).

Is it possible to play rap parts on piano etc?

If not, which instruments can rap be played on?

Edit: I don't mean piano singing the rap with all words etc. I mean can we lay the notes of the rap part on piano or any other instrument.

For example, in karaoke there is often a backing melody (which matches melody of the voice of singer(s), the words spoken by the singer(s) ). In those backing melody, the melody of singing part matches the song, but for rapping part they put one note repeating. So I wanted to know if we can reproduce the rap melody on piano etc or any other instrument.

PS: I am new to all musical terms (like notes, melody, key, tones etc) so please pardon if I use some incorrect terms and kindly edit my question if needed.

The whole point of rap is that it's not in particular pitches. If it was, it'd be singing, and easily reproduced on piano - or any other musical instrument. As it's basically talking, it isn't attributable to a particular key, so won't be classed as 'music that can be written in notes'. Or 'music that can be played in notes'. You may be able to get close on something like a violin, with notes available exactly on and off recognised pitches.

Back in my day (you young punks) there was this thing called "Patter - Song," which comprised a full tune and spoken lines (preferably poetic) for vocals. Cake pretty much does/did this. And there's the (in)famous example of Rex Harrison not singing all the numbers in My Fair Lady. So unless you want to try to recreate the African Drum Communication via two notes on the piano, you will need a vocalist to be able to produce "rap."

Do rap/hip-hop musician sample jazz parts?

Yes.

If you can sample jazz for hip-hop, then you should be able to live perform it in hip-hop too. You should be able to play some jazz piano patterns and have it fit.

I'm kinda old so I think of groups like Us3 and Jazzmatazz, but I know current musician also use jazz samples now. I just cannot name any names. Maybe try The Roots.

I think hard bop and modal are the jazz styles frequently sampled. Try listening to hip-hop with jazz samples and check out pianists like Bill Evans, Horace Silver, and Herbie Hancock. You will want to sort through the huge catalog of songs they recorded and look for the ones that emphasize funk and groove. Silver and Hancock will have more of that rather than Evans.

Starting point example: Us3 Cantaloop sampled Herbie Hancock's piano from Cantaloupe Island

EDIT

I read your addition about karaoke...

... in karaoke there is often a backing melody...but for rapping part they put one note repeating

I still don't really know what this question is about. Are you trying to make karaoke backing track for rap music?

But, I'll just get back to your question as asked...

Why can't we play rap on piano?

I'm going to try restating that in a way that I hope captures your intent. "Why can't an acoustic piano mimic the sound of rapping without the words?"

In that case the issue is piano has fixed pitches for the keys but the voice has flexible pitch.

When talking our voices produce pitches and those pitches slide up and down freely. Even in some rap styles where the rapper maintains a sort of droning pitch, different parts of the lyrics can have shifts in pitch for emphasis. Such shifts many involve sliding, very small intervals, or even a dropping off of a distinct pitch in a very flexible way. A piano simply cannot do all that subtle, flexible shifting of pitch.

If you try to play the rhythm of the rap on piano (without the words of course), the problem will be the unchanging pitch of the piano. Even if you try playing a step up or down from a central note on the piano, the pitches will be very distinct and not at all like the flexible pitch of the voice. The result surely will be a very monotonous sound from the piano.

If not [piano], which instruments can rap be played on?

I think any number of percussion instruments would be much better suited for mimicking the rap. A snare drum with brushes can get a lot of subtle tones. A talking drum could also work, because they are pitched and importantly they have strings on the drum side that can be squeezed to bend the pitch.

Rap is rhythmic speech. Speech has pitch any time there is a vowel sound or other vocal chord-produced sound happening. (F and S sounds are examples of sounds that don’t require vocal chord movement.) Rap, as rhythmic speech, is just not necessarily (or ever?) what we would call melodic, nor is it in equal temperament and organized into 12 pitches per octave. (Pianos have 12 pitches per octave, not 7.)

Instruments can definitely mimic singing and speech, to varying degrees of success. Electric guitar is much more pitch-flexible than piano. Here's an example of call and response between a vocalist and a guitarist. For the most part, this is melodic and doesn't answer the question, but it's a simple introduction to how it works and it may help to see it as it gets more esoteric.

Moving on, here's a band who made a hard rock backing track to the film Bambi. Listen as the electric guitarist mimics the speech of the rabbit character, Thumper.

With computers, speech can be analyzed to find the pitches of formants, which are harmonic resonances that vowel sounds and voiced consonants (Mmm, for example) have in human speech. This is how vocal correction algorithms like Auto-Tune work. Once analyzed, formants can be manipulated to become melodic, as this video of MLK's "I Have a Dream" speech demonstrates.

This German-language video shows some MIDI data played back on a Yamaha Disklavier, which is a regular piano equipped with robotics that play the instrument in an automated fashion. The MIDI data was extracted from human speech. See if you can understand what's being "said" without looking at the subtitles. (The piano "speaks" in English.)

There's no reason this technique couldn't be applied to rap music, assuming you have the vocal tracks isolated. Of course, this may not be humanly possible, but it doesn't mean it isn't possible. It’s also of limited use, since duplicating pitch isn’t really important in rap. It’s about getting the syllables to fall on particular parts of the beat.

Update: I found an additional video by music YouTuber Adam Neely, who, in a way, also addresses this question. He's applying the technique of mimicking the pitches in speech as inspiration to create jazz and fusion music. The video begins with him mimicking speech in a Simpsons episode on a bass guitar and he has added jazz harmony on a synthesizer. His video includes a couple examples I linked above and has more besides.