Re: [hatari-devel] MIDI slowness issue in Atari forum?

[D C <squall_dc@xxxxxxxxxxx>]

That test was done with the latest code from git (the wip 2.6.0) merged into the android build.

Android midi support was added before portmidi so it does it's own thing.

I also tested the latest archlinux hatari build (2.5.0) -> portmidi -> yamaha keyboard and that was in sync too.

I couldn't get the raw-midi device version of hatari working with my yamaha (although other midi programs like rosegarden works fine without portmidi)..

---

From: Eero Tamminen <oak@xxxxxxxxxxxxxx>
Sent: Friday, 2 May 2025 7:15 PM
To: hatari-devel@xxxxxxxxxxxxxxxxxxx <hatari-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [hatari-devel] MIDI slowness issue in Atari forum?

 

Hi,

Thanks for the video!

Are you using PortMidi or raw MIDI device file build of Hatari?

(I.e. do you give Hatari a device name, or device file path?)

And which Hatari, SDL2 and PortMidi version is being used?


        - Eero

On 1.5.2025 8.07, D C wrote:
> Haven't been following hatari these days but noticed this in my junk email and haven't been on the forum for a while (can't login anymore for some reason).
>
> But I was curious and tested it out on a real machine at the same time as hatari on android and the timing seems to be in sync for me.
>
> Falcon -> usb midi -> linux (fluidsynth)
>
> I turn off the volume on the tablet every now so it's easier to hear that it's in sync.
> (there's an occasional random note from linux-fluidsynth maybe caused by linux on my laptop)
>
> https://mega.nz/file/GxU1CD4Q#GuIdhHdoozwWC8ZqrzMIaHlp_KrGScfs7c5aDNzJndQ
>
>
> ________________________________
> From: Nicolas Pomarède <npomarede@xxxxxxxxxxxx>
> Sent: Tuesday, 22 April 2025 6:34 AM
> To: hatari-devel@xxxxxxxxxxxxxxxxxxx <hatari-devel@xxxxxxxxxxxxxxxxxxx>
> Subject: Re: [hatari-devel] MIDI slowness issue in Atari forum?
>
> Le 21/04/2025 à 19:43, Eero Tamminen a écrit :
>> Hi,
>>
>> Does anybody have any idea about the possible reasons why MIDI from
>> Hatari would be _consistently_ too slow on some setups:
>> https://www.atari-forum.com/viewtopic.php?p=477795#p477795
>>
>> ?
>
> Hi
>
> I saw this thread, but I don't really know what could cause this. I
> barely use midi myself, so I can't compare with my own experience. On
> the other hand some users are reporting correct MIDI when using hatari..
>
> So,
>    - either his setup is too slow somehow and he needs a more powerful PC,
>    - or there's an issue with some of the libs he uses on his RPi5 that
> creates problem when writing to the emulated midi port
> - or there's a very specific use of the acia register at fffc04/06 that
> would not be correctly emulated (there were some very low level timings
> fixed a long time ago to make 'Notator' works, but since then no one
> reported any problem). And the problem was it was loosing some bytes,
> not playing everything too slow.
>
> What could be interesting would be to run the same test as he does but
> on a "normal" Linux PC and see if the same slow down can be observed,
> (with someone doing this test having a midi setup known to work
> correctly already with Hatari)
>
> Nicolas
>
>
>