App to live transpose midi loops based on chords played?

espiegel123

@wim said:

…A C major chord and an A minor chord do have the same notes. However, it's the intervals that make a minor vs major cord.

Maybe you mean scale not chord? The c major and a natural minor SCALES have the same notes. But a c major chord and a minor chord do not have the same notes.

C major chord: C E G

A minor chord: A C E

seonnthaproducer

@wim said:

@seonnthaproducer said:
A song written in A Minor is the same as a song written in C major because Aminor is the relative minor of CMajor.

So, transposition will be the same thing as if you transposed in Cmajor.

You haven't said anything incorrect there, but you've misunderstood the context. With pitch shifting you're not transposing in scale. A C major chord and an A minor chord do have the same notes. However, it's the intervals that make a minor vs major cord.

A major triad's intervals are 0 +4 +3 semitones between the notes. A minor triad's intervals are 0 +3 +4 semitones between the notes. If you just take a C major chord and pitch shift it down to A, you still have the same major semitones difference between them. You will have an A major chord. You can trust me on that.

I don't have time to explain in further depth right now. If you're interested in not continuing to be wrong on this point, you really should look further into what you're saying.

Learnt something new today. Thanks, @wim

wim

@espiegel123 said:

@wim said:

…A C major chord and an A minor chord do have the same notes. However, it's the intervals that make a minor vs major cord.

Maybe you mean scale not chord? The c major and a natural minor SCALES have the same notes. But a c major chord and a minor chord do not have the same notes.

C major chord: C E G

A minor chord: A C E

Thanks, you're correct. I should have not tried writing that when pressed for time.

tyslothrop1

On desktop, there are pitchshifters that can respect scales. Zplane retune, zynaptic pitchmap and eventide Quadra-/Octavox, off the top of my head.

Not sure, if maybe Eventide qvox (is it the same as quadravox?) is able to do it on iOS, although I think it still wouldn't fit the OP's needs.

Gravitas

To clarify..

Pitchsifters work on audio
Transposition tools work on midi

From the OP's original question it sounds like they need a midi tool.

Errorplane

@tyslothrop1 said:
On desktop, there are pitchshifters that can respect scales.

That blows my mind! As does stem separation - truly magic is at work here.

But I'm really looking for a midi tool as @gravitas says.

MonkeyDrummer

You’re barking up the same tree I’ve been in a million times over the years.

From literally hundreds of experiments and tests, the best you’ll most likely find is a solution like this…

On the composing/performance side, do everything in C maj (white keys).
Just give up on inversions and other voicings that place any note lower than the root that’s not the root (lower octave c would be fine). The extra music-nerd flex you get for playing weird inversions is just not worth the pain.

Then flow the midi from above into other plugins or processing scripts that work on the above assumptions. Namely, incoming is C maj scale and lowest note in chord is root.

I recently discovered @wim ’s simple scaler Mozaic script and it was literally the skeleton key that opened up quite a bit.

Another highly useful Mozaic script is Chord Scale Quantize. You feed in a chord on one channel and it acts like a “mask” or sieve for other notes coming in on other channels.

StepPolyArp is useful as well as you can use its note index function on the arp. That is, you can specify which chord note, based on scale position (lowest=1, next up = 2, etc) to extract and play bass lines, etc.

wim

Or you can be even lazier like me. Just always play them white keys, but shift the root depending on the mood you want. No plugins needed. Want a "happy minor" start on D (dorian), a bit of mystery start on E (Phrygian), some Beatles vibe, start on G (Mixolydian), a lil' modern shredding start on F (Lydian). Hit a black key by accident once in awhile for spice. Chords? No problem. Just skip every other key.

No wonder everything I make bores me. 😂

audiblevideo

@wim said:
Or you can be even lazier like me. Just always play them white keys, but shift the root depending on the mood you want. No plugins needed. Want a "happy minor" start on D (dorian), a bit of mystery start on E (Phrygian), some Beatles vibe, start on G (Mixolydian), a lil' modern shredding start on F (Lydian). Hit a black key by accident once in awhile for spice. Chords? No problem. Just skip every other key.

No wonder everything I make bores me. 😂

lol
work in some chord substitutions and you'll be fine.

wim

@audiblevideo said:

@wim said:
Or you can be even lazier like me. Just always play them white keys, but shift the root depending on the mood you want. No plugins needed. Want a "happy minor" start on D (dorian), a bit of mystery start on E (Phrygian), some Beatles vibe, start on G (Mixolydian), a lil' modern shredding start on F (Lydian). Hit a black key by accident once in awhile for spice. Chords? No problem. Just skip every other key.

No wonder everything I make bores me. 😂

lol
work in some chord substitutions and you'll be fine.

You mean like using those weird little black keys? In a chord? That's some next-level shit right there!