Re: [fluid-dev] ALSA Raw connection (Re: Reading input from a MIDI device)

[Vesa Paatero]

Hi, back in discussion, sorry about the delay...

28.12.2013 09:48, David Henningsson wrote:
> On 12/26/2013 11:37 PM, Vesa Paatero wrote:
>
>
> > > > The easiest way is to use the alsa rawmidi driver. Find the card name by
> > > > looking at the /proc/asound/cards file - find the row corresponding to
> > > > the right sound card, and the label within brackets.
> > > > In my case it's "Piano", so then the options I need to add are:
> > > >
> > > > " -m alsa_raw -o midi.alsa.device=hw:Piano"
> > > >
> > > > (of course in your case replace "Piano" with your card name)
> > > Thanks for these hints, David. Raw MIDI without any mixer activity by
> > > CPU sounds like a good choice to minimize latency.
> > I tried the ALSA raw option but it seems that "aconnect" can only be
> > used to connect the MIDI input device to FluidSynth when "-m alsa_seq"
> > is given to FluidSynth because only then a suitable connection entry
> > shown by "aconnect -lio" is created.
> >
> > So, when using alsa_raw, what is the recommended way to connect a MIDI
> > input device?
> You shouldn't use aconnect at all in this scenario. Just let fluidsynth
> read the raw ALSA input directly.

But... how?  OK, let's "think aloud":  I have the MIDI device that sends
data. ALSA seems to connect to it automatically because the device
becomes visible to "aconnect -lio". So I just need need to figure out
the connection from ALSA to FluidSynth.. or should I say that I need
to tell FluidSynth where to look for the MIDI data to be forwarded
to the sound card. I guess I still have to specify the avenue of input
by the command line somehow but I haven't found anything appro-
priate.

Vesa