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Show HN: MidiPad 2 – A customizable Midi Pad Controller

midipadapp.com

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Re: Show HN: MidiPad 2 – A customizable Midi Pad Controller

#5

Post by jamescostian »

divenorth wrote: post #3

Interesting that you use motion sensors to create midi velocity. How accurate is that? Any reason for not adding midi sliders and knobs too? Most MIDI apps include those and are used by many composers/musicians.

I'm also curious about motion sensors for MIDI. I would have thought 3d-touch would be more accurate

Re: Show HN: MidiPad 2 – A customizable Midi Pad Controller

#6

Post by thedjinn »

divenorth wrote: post #3

Interesting that you use motion sensors to create midi velocity. How accurate is that? Any reason for not adding midi sliders and knobs too? Most MIDI apps include those and are used by many composers/musicians.

The accuracy is a trade-off between latency and precision. The touch event arrives as soon as you touch the screen, but the actual force of your touch still needs a few milliseconds to actually put the device into motion. Waiting a little bit while collecting measurements gives you quite an accurate indication of the force used, but the increased latency makes it harder to play.

Sliders and knobs will be added in a future version. I wanted to put an MVP on the app store first before adding additional features.

Re: Show HN: MidiPad 2 – A customizable Midi Pad Controller

#7

Post by thedjinn »

jamescostian wrote: post #5
divenorth wrote: post #3

Interesting that you use motion sensors to create midi velocity. How accurate is that? Any reason for not adding midi sliders and knobs too? Most MIDI apps include those and are used by many composers/musicians.

I'm also curious about motion sensors for MIDI. I would have thought 3d-touch would be more accurate

3D touch is not supported on all devices unfortunately.

Re: Show HN: MidiPad 2 – A customizable Midi Pad Controller

#8

Post by thedjinn »

mikewhy wrote: post #4
pampa wrote: post #2

Velocity sensitive pads on a touch screen? Wow, didnt know this was possible.

Garage Band for iOS did it on release back in 2011. Using the accelerometer it's possible to simulate some sort of velocity.

Exactly. The general idea is that you get a measurement of the applied force, so integrating that value gives you an approximate velocity.

Re: Show HN: MidiPad 2 – A customizable Midi Pad Controller

#9

Post by dwringer »

thedjinn wrote: post #6
divenorth wrote: post #3

Interesting that you use motion sensors to create midi velocity. How accurate is that? Any reason for not adding midi sliders and knobs too? Most MIDI apps include those and are used by many composers/musicians.

The accuracy is a trade-off between latency and precision. The touch event arrives as soon as you touch the screen, but the actual force of your touch still needs a few milliseconds to actually put the device into motion. Waiting a little bit while collecting measurements gives you quite an accurate indication of the force used, but the increased latency makes it harder to play. Sliders and knobs will be added in a f…

Sliders and knobs are one thing, but this format really invites the use of XY controllers where sliding a finger in the x-dimension modulates one parameter, while the y-dimension modulates another. I am certain more complex schemes should be possible, especially given the possibilities of multi-touch input. I would love to see something like this included.

Re: Show HN: MidiPad 2 – A customizable Midi Pad Controller

#10

Post by mikewhy »

thedjinn wrote: post #8
mikewhy wrote: post #4

Earlier quoted context omitted.

Garage Band for iOS did it on release back in 2011. Using the accelerometer it's possible to simulate some sort of velocity.

Exactly. The general idea is that you get a measurement of the applied force, so integrating that value gives you an approximate velocity.

Assuming you worked on the app based on your other replies. Is 3D Touch applicable here?
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