[midiin] to note values?

Reply to [midiin] to note values? on Fri, 15 Sep 2023 12:12:17 GMT

bamsehopp — Fri, 15 Sep 2023 12:12:17 GMT

I'm using a raspberry pi 4 running Patchbox OS and Pisound. I've found that using [notein] adds up to 40 ms latency when using the hardware midi inputs of Pisound. However, using [midiin] instead I can get it as low as 5 ms latency! Not sure why notein adds so much delay... Anyway now I need a way to sort the midi data coming in from [midiin] into note values and velocity, But the stream of numbers enter sequentially and not as a list, so I don't have a way of sorting the numbers. Any ideas how to way easily route the incoming note value and velocity down different paths? Thanks!

Reply to [midiin] to note values? on Sat, 16 Sep 2023 03:45:15 GMT

ddw_music — Sat, 16 Sep 2023 03:45:15 GMT

"Easy," not really -- because the meaning of byte 'n' depends on what was byte 'n-1'. The current received byte has to set the routing for the next byte, which is a bit outside of normal straight-shot patching.

However I tested this with some simulated messages (including running status bytes) and it does seem to parse them out correctly. You could extend it for other message types too, but I don't have time to go further than this.

23-0916-midiin-state-machine.pd

hjh

Reply to [midiin] to note values? on Sat, 16 Sep 2023 09:12:00 GMT

bamsehopp — Sat, 16 Sep 2023 09:12:00 GMT

@ddw_music

Wow that proved to be more complicated than I first thought! Thanks a ton for that patch, It works great! I don't really need more than note values for this project anyway.

Reply to [midiin] to note values? on Sat, 16 Sep 2023 14:46:29 GMT

ddw_music — Sat, 16 Sep 2023 14:46:29 GMT

@bamsehopp said:

Thanks a ton for that patch, It works great!

Oh, glad to hear that, I did only the barest minimal testing so I wasn't sure if there were any bugs. I had done state machines in SuperCollider but not so much in Pd up to this point.

hjh

Reply to [midiin] to note values? on Sun, 17 Sep 2023 16:07:38 GMT

bamsehopp — Sun, 17 Sep 2023 16:07:38 GMT

I didn't notice any bugs, and was actually able to play a whole gig last night using your code in my custom built pd sampler! So i think its safe to say its an efficient method!

Reply to [midiin] to note values? on Thu, 19 Oct 2023 08:43:10 GMT

unclewayback — Thu, 19 Oct 2023 08:43:10 GMT

(edit: updated patch in following message)

Hello, I have been fiddling around wondering about how to make a vanilla midiparser that can handle MPE messages like release velocity - your patch was really helpful, thanks!

I've completed it with all the types of 'midi status bytes' that I know of, and changed the routing system a little bit. It seems to be working well for me.

Thanks for the info about latency and the native notein object.

Hope someone finds this useful,
Sam.

Reply to [midiin] to note values? on Fri, 20 Oct 2023 18:33:05 GMT

unclewayback — Fri, 20 Oct 2023 18:33:05 GMT

midi-up.pd

This is an updated patch, I hadn't quite got the hang of 'running status'. The patch now also has all the midi real time messages. The most helpful tutorial I have found for understanding how to handle midi is this one: https://learn.sparkfun.com/tutorials/midi-tutorial/all

Reply to [midiin] to note values? on Wed, 15 Nov 2023 10:12:58 GMT

kazeko — Wed, 15 Nov 2023 10:12:58 GMT

@unclewayback said:

midi-up.pd

amazing work ,thank you