Hi all,

I'm currently trying to use a Tascam US-122mkII sound card with Linux. I've made the following attempts:

* with a Debian-Wheezy-based distro (called Tango Studio) which is stopped now => I can use the Tascam card * with a Debian-Jessie-based distro (called Librazik) which development is active => I cannot use the Tascam card

I'm able to use the card with Tango Studio but I would prefer to use the Librazik as there's a community maintaining it.

* In Debian Wheezy, the card is identified as US122L * In Debian Jessie, the card is identified as US122mkII which looks promising but it's not fully functional

These are the steps we went through with the linuxmao.org team : == checking the kernel version == ********************************************************************************** Debian Wheezy cat /proc/version ********************************************************************************** Linux version 3.2.0-4-realtime-amd64 (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP PREEMPT RT Debian 3.2.57-3+tstudio.2

********************************************************************************** Debian Jessie cat /proc/version ********************************************************************************** Linux version 4.6.0-1-lzk-bl-amd64 (debian-kernel@lists.debian.org) (gcc version 4.9.2 (Debian 4.9.2-10) ) #1 SMP PREEMPT Debian 4.6.2-2librazik1 (2016-06-29)

== checking the sound card detected ==

********************************************************************************** Debian Wheezy cat /proc/asound/cards ********************************************************************************** 0 SB http://linuxmao.org/SB: HDA-Intel - HDA ATI SB HDA ATI SB at 0xfebfc000 irq 17 1 US122L http://linuxmao.org/US122L: USB US-122L - TASCAM US-122L TASCAM US-122L (644:8021 if 0 at 001/002)

********************************************************************************** Debian Jessie : cat /proc/asound/cards ********************************************************************************** 0 SB http://linuxmao.org/SB: HDA-Intel - HDA ATI SB HDA ATI SB at 0xfebfc000 irq 17 1 MKII http://linuxmao.org/MKII: USB-Audio - US122 MKII TASCAM US122 MKII at usb-0000:00:13.5-1, high speed

== creating a ~/.asoundrc file ==

I was instructed to create an .asoundrc file

**********************************************************************************

1. got from http://www.nabble.com/tascam-us122l-and-ccrma-td24036395.html 2. thanks to Karsten

1. The usb_stream plugin configuration

pcm.!usb_stream { @args CARD http://linuxmao.org/CARD @args.CARD { type string default "0" }

type usb_stream

card $CARD }

ctl.!usb_stream { @args CARD http://linuxmao.org/CARD @args.CARD { type string default "0" }

type hw

card $CARD } **********************************************************************************

== starting Jack server == I'm using QjackCtl to start the Jack server with the following parameters:

********************************************************************************** Debian Wheezy QjackCtl -> Settings -> Parameters -> "Interface" : usb_stream:1 ********************************************************************************** => Jack server starts OK

********************************************************************************** Debian Jessie QjackCtl -> Settings -> Parameters -> "Interface" : usb_stream:1 ********************************************************************************** => Jack server does not start I've tried to remove the .asoundrc : Jack server does not start either

********************************************************************************** Debian Jessie QjackCtl -> Settings -> Parameters -> "Interface" : hw:MKII US122 MKII (hw:1) (this value is already in the drop-down list of interfaces ********************************************************************************** => Jack server starts with the following message :

********************************************************************************** hw:MKII|hw:MKII|1024|2|48000|0|0|nomon|swmeter|-|32bit ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode **********************************************************************************

The result is I can use the sound card to play sounds but cannot get any input from it (I'm trying to get MIDI events)

The linuxmao.org team thinks there might be a change in the ALSA driver in the latest releases. What do you think?

Thanks for your help

Christian