Ardour.rc and sound cards

Installation & Configuration Linux
#1

Hi,

I’m trying to push the sample rate to 96000, of which my Mackie Spike XD2 is capable in theory, so I changed the setting in Qjackctl to that value. Yet when I launch Ardour and create a new session, it defaults to 48000. I suspect it’s related to this part of ardour.rc:

This part of the file also shows the onboard card instead of Mackie. Here is what I have on my system.

cat /proc/asound/cards
0 [IXP ]: ATIIXP - ATI IXP
ATI IXP rev 0 with AD1888 at 0xfe800000, irq 19
1 [XD2 ]: USB-Audio - Mackie XD-2
Mackie Designs Mackie XD-2 at usb-0000:00:13.1-2, full speed

I’d appreciate any pointers.

#2

ooops, Drupal ate part of my post (there has to be a more elgant way, but I had to strip the initial tag bracket to get this to show). So this is the part of ardour.rc I was referring to:

AudioSetup> periods val="2"/> priority val="60"/> ports val="128"/> inchannels val="0"/> outchannels val="0"/> inlatency val="0"/> outlatency val="0"/> realtime val="0"/> nomemorylock val="0"/> unlockmemory val="0"/> softmode val="0"/> force16bit val="0"/> hwmonitor val="0"/> hwmeter val="0"/> verbose val="0"/> samplerate val="48000Hz"/> periodsize val="1024"/> serverpath val="/usr/bin/jackd"/> driver val="ALSA"/> interface val="ATI IXP AC97"/> timeout val="Ignore"/> dither val="None"/> audiomode val="Playback/Recording on 1 Device"/> inputdevice val="ATI IXP AC97"/> outputdevice val="ATI IXP AC97"/> /AudioSetup>
#3

if you use qjackctl to start JACK, what is in ardour.rc relating to JACK configuration is 100% irrelevant.

to use your Mackie interface, you need to tell qjackctl to use hw:1 in the setup dialog, right hand side, toward the top. it can’t know this unless you tell it.

requesting an unsupported sample rate does not cause JACK to report an error: it uses the SR closest to the one you requested. this was at the request of many users several years ago.

#4

Thanks for the explanation. I’ve been actually doing just that with qjackctl (selecting hw:1). I guess the Mackie interface doesn’t manage to attain the advertised 96 kHz, heck knows why.

Just curious, say I didn’t use qjackctl to start JACK, what kind of notation I should use in ardour.rc to make Ardour use the Mackie card? (hw:1?)