Re: two USB sound cards on the same FreeBSD system with jackd

On Sat, 2023-04-01 at 21:28 +0200, Tomek CEDRO wrote:
> On Sat, Apr 1, 2023 at 4:35 PM white-wolf wrote:
> > hello,
> > for learn guitar in video conferences, i need to configure two
> > sound cards on my FreeBSD Desktop.
> > 
> > one for connect my guitar by an audiobox USB sound card, no need
> > feedback
> > one for my wireless headset microphone
> > 
> > to connect ardour and hydrogen with jack and alsa (or else)
> > for use my headset to listen and speak and my audiobox to forward
> > my electric guitar under zoom or jitsi by pulse (or else)
> 
> Hey there, HPS (CC) created amazing free-and-open-source audio
> client-server utility dedicated to high quality low latency multiple
> online paths audio jamming together called HPSJAM that you need to
> try
> out:
> 
> https://github.com/hselasky/hpsjam
> 
> It is already in the ports audio/hpsjam, there is a build for macOS
> and Android.
> 
> You need to attach jackd (man jackd) to a selected card first so it
> is
> visible to hpsjam. You can connect multiple soundcards.

ok, no need to rebuild gnome with jack; alsa and pulseaudio support ?

> 
> Personally everyday I use PulseAudio backend for audio because it
> allows ongoing stream re-route to a different devices, control
> individual applications volume level, etc, your audio application
> needs to support PulseAudio though.
> 
> It is possible to have Bluetooth audio on FreeBSD you can do that
> with
> virtual_oss (man virtual_oss) + bluetooth (man bluetooth-config).
> 
> At the basic level with a bare base system you have SND
> infrastructure
> (man snd) that creates a /dev/dspX.Y (where X is the card number and
> Y
> is the audio channel) for each audio device (even if its a
> microphone). You can then adjust audio volumes with mixer -f
> /dev/mixerX and control card parameters with sysctl. Most
> applications
> support OSS so you only need to provide /dev/dspX of your interest to
> the application.
> 
> But, first of all your audio hardware needs to be supported by a
> kernel driver, you can know that by watching dmesg and /dev/dsp*
> devices (simplest way of testing what number card use is to make some
> noise with cat /dev/random > /dev/dsp0..n) :-)
> 
> Have fun :-)
>