Reading and manipulating Score parameters from Max

score
1

Hi all, I’m wondering if someone could share a Max patch that demonstrate how to read and manipulate Score’s internal parameters. There are two concrete things I’m interested in doing right now:

-Using a number box in Max to remotely control the speed of a given interval.
-Reading the boolean value of Score’s play state (/score/play, I believe) in Max and using it to control something else.

From the Add device menu in Score, I can see that Score is available as an OSCQuery device (at ws://[myMachine].local.:9999 by default), but I’m not quite sure how to read or write values from here in Max. I tried looking at the Ossia overview patcher - specifically at the example on getting an OSCQuery-formatted namespace as a dictionary - but Max reports that the maxurl object doesn’t support WebSocket addresses ("maxurl: Protocol “ws” not supported or disabled in libcurl). Any help is greatly appreciated!

2

Try that : https://github.com/OSSIA/score/blob/master/Documentation/Examples/Max/score-client.maxpat

Warning : WIP + might be crashy but at least it shows the principles

3

It should be less crashy as of my last commit if anyone can try

4

Also, to see which values are available to read / write, add the “Local” device in score (it’s the special device that exposes score’s parameters to oscquery) ; you can also check http://127.0.0.1:9999 in a web browser (preferably firefox, it shows json prettily)

5

Thanks bltzr and jcelerier! I tried the patch out, and it’s all working fine over here.

6

Actually, I see that Max crashes if Score is open and I send the “connect oscquery ws://127.0.0.1:9999” message to ossia.client more than once.

ossiacrash

Testing with ossia-max 1.0.0, Score 2.0.0-a4, Max 7.3.5, OS X 10.11.6.

Let me know if you want the crash report - it’s too big to paste and you can’t attach txt files here, but I can email it or put it in the Gitter.

7

Sorry about that crash Evan. This is already logged here: https://github.com/OSSIA/libossia/issues/389

8

Oops, missed it - thanks @jln!

9

Another thing - when I open a patch that has an [ossia.remote running] object (which I’d like to use to monitor Score’s transport state) as well as an [ossia.client score], after a certain delay I get the following error message in the Max window:

ossia.client: oscquery_mirror_protocol::oscquery_mirror_protocol: Could not connect to ws://127.0.0.1:5678

This happens even when a “connect oscquery ws://127.0.0.1:9999” message has been sent to the ossia.client via a loadbang. Once this error message appears, the [ossia.remote running] no longer reports accurate values.

ossia_transport_problem
ossia_transport_problem.gif720×364 2.3 MB

Here’s the patch:


----------begin_max5_patcher----------
427.3ocwTEtSCBCD92vSQS+MhTX.Y6UwrX5fKZWfVrsL2hw2cKWAiywxlQWj
DJ495w8ce2csuEFP2n1CFJYE4ARPvagAAHz.Pvnc.skuupgaP2nsfwveBnQ9
8rvdKhmLgHpQa0ls2sbBS12p5sMfEiAaD0CYOzA9DfRIqG2xXOzfnzuDBgbJ
Boifcba0yB4SOpgJqOHr73jHBq.+jmLrllFmPVO7GuGFNrDckZUBu5jwIRUY
LBdrFZUVfn6kRWFLi5KmW8YmU8QiuWaUfcwpPZh+S1snLzn30a3yJ8heXiGC
yemrw0heWu+by4UJozwGQYpdoGzGHuZVc+8rzxXGewrUKcOyTQx92NJr.WSY
Y2tiBUMBPZIlJkFlQ6rak1u3jPoedHYdsizPaDxueCHFuA7iKHFUutZJIGOg
SXelr0fwJjbqPI+hOKOxmVQcmRHsiDVVDmOLuh4Wd9mFmoEcs4k63GI4B4Ul
2meEOYWAOrS3wW14cc6.sYzYjB2D2VkdvrLBMERuIdkIUC6DS9miHbsqsac8
7dseJYewBp+WU0fV1KvojvAleO7C8hHlJA
-----------end_max5_patcher-----------

I know this is an open issue, but in the meantime is there any other way to send Score’s transport state to Max, e.g. to establish a direct OSC connection?

Edit: just tried with the latest release from the repo (1.0.0-b19), and now Max spontaneously crashes a few seconds after connecting to Score. Brief notes from the crash report:

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000138a
Exception Note: EXC_CORPSE_NOTIFY

10

I think there’s something wrong with the (automatic) name-based connection (it it’s confirmed, then I guess it should be reported)

so, could you try giving another (or no) name (ie argument) to ossia.client than “score” ?
And see if that helps

I just tried and it seemed to work fine

11

ossia.client with no argument seems to work here too - thanks! Perhaps score-client.maxpat should be updated accordingly, at least until the underlying name-based connection issue you mention is sorted.

12
13

@jcelerier does local device only interact with OSCquery? can I also send plain old OSC to it? say controlling the play state from qlab? what would I put in websocket for that?

14

You have to create an osc device for that : choose osc instead of osc query when creating a new device

Does that help?

15

no I meant local device to control play and stop etc in score…

16

Ah OK, sorry I misread your message.

I think @jln did that from max. AFAIK you just have to send plain osc messages to score’s osc port.

I tried the other day (not very hard) and I was not so successful, but I think I missed some things for that…

17

But yes at least for play and stop it works quite easily
/play 0 or 1
Just /stop (without value)

18

OSCQuery is a superset of “plain old OSC”. Every OSCQuery device is also an OSC device.