I checked proc/asound/cards aftre connecting a USB sound card. and it listed both PC sound card and
USB sound card as [HD] - usb soundcard and [PCH] - pc sound card.

However when I started jack with
jackd -d alsa -d hw:HD   and printed the ports it was showing only one two ports (left & right).

I want both PC and USB sound card ports to be accessed at the same time.

How to enable all sound card input and output ports ?


-ben
From: Jack-Devel <jack-devel-bounces@lists.jackaudio.org> on behalf of David Kastrup <dak@gnu.org>
Sent: Sunday, January 14, 2018 3:38 PM
To: jack-devel@lists.jackaudio.org
Subject: Re: [Jack-Devel] Using USB sound card with Jack
 
Benny Alexandar <ben.alex@outlook.com> writes:

> Hi,
>
> I'm using latest jack audio server version jackd 1.9.12. I have built
> simple client.c app
> and able to capture audio from microphone input and play it out.
>
> I have another USB soundcard which is connected to pc through USB.
> How to get input from USB soud card ?
>
> After connecting USB sound card and when printed the ports[] array
> after executing the jack API jack_get_ports()
> I could see only PC microphone capture ports, not showing USB ports.

Start jackd as

jackd -d alsa -d hw:1 ...

Instead of hw:1 you may use whatever ALSA decides to call this device
(cf the verbose name in [...] in /proc/asound/cards: if it is
[Satellite   ], -d hw:Satellite may word).

--
David Kastrup
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