[Stk] RtAudio application/port name (for jack in particular)

[Gary P. Scavone]

Hi Stephen,

Thanks for the comments.  I already made a change to RtMidi that  
allows one to name virtual MIDI ports in ALSA and OS-X (via the  
openVirtualPort() function).  The currently distributed version has  
this (http://www.music.mcgill.ca/~gary/rtmidi/classRtMidi.html).

I'm currently working on a new version of RtAudio and something  
similar should happen there for Jack.  At the moment, I'm trying to  
"nail down" the new API in OS-X before propagating it to the other  
supported audio APIs.  The port naming feature is API-specific so  
I'll need to find a consistent way to support it.

Regards,

--gary

On 29-Dec-06, at 11:32 PM, Stephen Sinclair wrote:

> Hello,
>
> In a program I have written using RtAudio, I have mostly been using  
> it with ALSA.  Recently I thought I'd see how it would work with  
> Jack.  It works quite well!
> One thing I noticed though is that the Jack device always shows up  
> as "RtApiJack" instead of something meaningful with the  
> application's name.
>
> Would it be beneficial to add some mechanism to the RtAudio object  
> to specify the application name?
> It would be useful also for RtMidi, with the ALSA device name.   
> Currently it just shows up as RtMidi Input or RtMidi Output.
>
> By the way, a quick test just showed me that a very real problem  
> with not having unique names for the Jack device is that when you  
> run more than one application that uses RtAudio, only the first one  
> shows up in the "Connect" dialog in qjackctl.  I guess ideally  
> you'd not only want a unique name for the application, but also a  
> unique name between instances of the same application.  Not sure  
> how to approach that problem..
>
> Another thing I noticed today is that sometimes I get some major  
> clicking or other kinds of distortion if my application's buffer  
> sizes don't match well with the Jack settings. Is this a common  
> Jack problem?  I haven't used Jack much, and certainly not with any  
> non-RtAudio applications, so I have nothing to compare with.
>
>
> Steve
> ps., this post is just to get some opinions on the topic. I'll  
> probably try it and post a patch sometime soon.
>
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