Ubuntu + M-Audio Fast Track Pro + Problema com sinal de entrada

Recentemente pluguei uma plada de áudio usb M-audio Fast Track Pro em um note com Ubuntu Gnome 15.10 e, da primeira vez tudo funcionou pefeitamente, porém, após atualizar o sistema (kernel update) fiquei só com o sinal de saída e não pude mais gravar nada com a interface.

Depois de muito pesquisar me parece que este problema é um tanto antigo e existem várias soluções sugeridas.

A solução mais simples, rápida e eficiente que encontrei foi a seguinte:

Baixe o arquivo "fast-track-pro.conf" do link abaixo ou crie-o na pasta "/etc/modprobe.d/".

Link do arquivo:
https://drive.google.com/file/d/0B89XHw6WcgFvMDZ1Q3FNUkc4Tjg/view?pref=2&pli=1

Conteúdo do arquivo:
# IMPORTANT: DO NOT COPY CONTENTS OF THIS FILE TO TEXT EDITOR IF VIEWING FROM WEB BROWSER,
# JUST SAVE THE FILE TO YOUR COMPUTER!!!
# OR VIEW THIS FILE IN UNICODE (UTF-8) MODE IF YOU REALLY WANT TO COPY AND PASTE
# OTHERWISE YOU WILL GET FORMATTING ERRORS AND THE FILE WILL NOT WORK
#
# All configurations shown at the bottom of this file will put the Fast Track Pro as device number 5.
# So in qjackctl or from terminal you will always know that device 5 will be the Fast Track Pro.
# You can change this device number if necessary by changing the index=5 to another number.
#
# Each configuration line has an explanation above it (which should be left commented) so you know how
# the Fast Track Pro will be running.
#
# Only uncomment one line (remove # at start of line) depending how you are going to use your FastTrack Pro.
#
# After making changes to this file and saving it you should power off your Fast Track Pro and unload and reload
# the snd-usb-audio module by doing the following in a terminal:
#
# sudo modprobe -r snd-usb-audio
# sudo modprobe snd-usb-audio
#
# If that doesn't work, and you do get an error message saying that the snd-usb-audio module is in use then just
# reboot your machine.
# This is why it's better to not have any other USB audio devices connected, because they also get a hold of the
# snd-usb-audio module.
#
# According to the patch, the possible values for the device_setup parameter are the sum of the following numbers:
#
#    * 0×01 : use the device_setup parameter, always needed
#    * 0×02 : enable digital output (channels 3,4)
#    * 0×04 : use 48kHz-96kHz sampling rate, 8-48 kHz if not used
#    * 0×08 : 24bit sampling rate
#    * 0×10 : enable digital input (channels 3,4)
#
#===================================================================================================================
#===================================================================================================================
#===================================================================================================================
#
#                                          CONFIGURATION LINES (ONLY UNCOMMENT ONE):
#
#===================================================================================================================
#===================================================================================================================
# 24 BIT - 44.1/48 KHz - 2 INPUTS (ANALOG) - 4 OUTPUTS (ANALOG + DIGITAL) - THIS IS THE DEFAULT AND ENABLED:
options snd_usb_audio vid=0x763 pid=0x2012 device_setup=0x9 index=5 enable=1
#===================================================================================================================
#===================================================================================================================
#
#===================================================================================================================
#===================================================================================================================
# 24 BIT - 88.2/96 KHz - 4 INPUTS (ANALOG + DIGITAL) OR 4 OUTPUTS (ANALOG + DIGITAL) - DUPLEX IS NOT SUPPORTED
#options snd_usb_audio vid=0x763 pid=0x2012 device_setup=0x5 index=5 enable=1
#===================================================================================================================
#===================================================================================================================
#
#===================================================================================================================
#===================================================================================================================
# 24 BIT - 44.1/48 KHz - 2 INPUTS (DIGITAL) - 4 OUTPUTS (ANALOG + DIGITAL)
#options snd_usb_audio vid=0x763 pid=0x2012 device_setup=0x13 index=5 enable=1
#===================================================================================================================
#===================================================================================================================
#
#===================================================================================================================
#===================================================================================================================
# 16 BIT - 44.1/48 KHz - 4 INPUTS (ANALOG + DIGITAL) - 4 OUTPUTS (ANALOG + DIGITAL)
#options snd_usb_audio vid=0x763 pid=0x2012 device_setup=0x0 index=5 enable=1
#===================================================================================================================
#===================================================================================================================
#
# To use the other Inputs/Outputs if available as shown in the configuration lines above you must use either the
# alsa_in or alsa_out commands so they become available to JACK and other applications.
# For example let's say you will run the Fast Track pro with device_setup=0 which makes it run at 16 bit mode
# and you make qjackctl use the hw:5,1 input then in a terminal you will type:
# alsa_in -d hw:5,0 to engage the other 2 inputs, then they will appear in your qjackctl connections tab.
# It doesn't matter if you do it the other way around, like telling qjackctl to use hw:5,0 in that case you will use
# hw:5,1 with the alsa_in command.
#
# Same applies with outputs but with the alsa_out command.
#
# Any questions or issues? just send me an e-mail: joegiampaoli@gmail.com
#
# Cheers!

- Se fizer o download, realize o comando no terminal (na pasta onde encontra-se o arquivo) - este comando mudará o proprietário e grupo do arq para root e o moverá para a pasta modprobe.d:
chown root fast-track-pro.conf && chgrp root fast-track-pro.conf && mv fast-track-pro.conf /etc/modprobe.d

- Se for criar o arquivo diretamente na pasta modprobe.d, basta utilizar o comando abaixo e colar o conteúdo postado logo acima:
sudo nano /etc/modprobe.d/fast-track-pro.conf

OBS: eu utilizei a configuração padrão (24 bit - Duplex ha 48 KHz) mas é possível explorar outras configs:
# 24 BIT - 44.1/48 KHz - 2 INPUTS (ANALOG) - 4 OUTPUTS (ANALOG + DIGITAL) - THIS IS THE DEFAULT AND ENABLED:
options snd_usb_audio vid=0x763 pid=0x2012 device_setup=0x9 index=5 enable=1

Agora basta reiniciar o computador e pronto!

Referência:
http://joegiampaoli.blogspot.com.br/2011/06/m-audio-fast-track-pro-for-debian-linux.html

Neste link existem muitos outros procedimentos que podem ser feitos, inclusive para eliminar latência.
Ubuntu + M-Audio Fast Track Pro + Problema com sinal de entrada Ubuntu + M-Audio Fast Track Pro + Problema com sinal de entrada Reviewed by Marcos Garcia on fevereiro 16, 2016 Rating: 5

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