Solution pour filtrage actif "logiciel" avec carte USB XMOS multicanal

[jtwildduck]

Voici le fichier de config :

Code :

## DEFAULT GENERAL SETTINGS ##
float_bits: 32;             # internal floating point precision
sampling_rate: 192000;       # sampling rate in Hz of audio interfaces
filter_length: 4096,16;      # length of filters
overflow_warnings: true;    # echo warnings to stderr if overflow occurs
show_progress: true;        # echo filtering progress to stderr
max_dither_table_size: 0;   # maximum size in bytes of precalculated dither
allow_poll_mode: false;     # allow use of input poll mode
modules_path: "/usr/local/bin/brutefir";   # extra path where to find BruteFIR modules
monitor_rate: true;        # monitor sample rate
powersave: true;           # pause filtering when input is zero
lock_memory: true;          # try to lock memory if realtime prio is set
safety_limit: 100;

## LOGIC ##

logic: "cli" { port: 3000; };

## COEFFS ##

coeff "leftwof" {
      filename: "/home/pi/brutefir_filters/left_LPF80Hz_96dbOct_192Khz32kTap.wav";
      format: "S24_4LE";
};

coeff "rightwof" {
      filename: "/home/pi/brutefir_filters/right_LPF80Hz_96dbOct_192Khz32kTap.wav";
      format: "S24_4LE";
};

coeff "leftmid" {
      filename: "/home/pi/brutefir_filters/left_LPF80Hz_HPF1k2Hz_96dbOct_192Khz32kTap.wav";
      format: "S24_4LE";
};

coeff "rightmid" {
      filename: "/home/pi/brutefir_filters/right_LPF80Hz_HPF1k2Hz_96dbOct_192Khz32kTap.wav";
      format: "S24_4LE";
};

coeff "lefttwet" {
      filename: "/home/pi/brutefir_filters/left_HPF1k2Hz_96dbOct_192Khz4kTap.wav";
      format: "S24_4LE";
};

coeff "righttwet" {
      filename: "/home/pi/brutefir_filters/right_HPF1k2Hz_96dbOct_192Khz4kTap.wav";
      format: "S24_4LE";
};

## INPUT, OUTPUT ##
input "left", "right" {
       device: "alsa" { device: "hw:CARD=USBStreamer,DEV=0";}; # ignore_xrun: true; };
       sample: "S32_LE";
       channels: 10/8,9;
};

#output "rsub", "lsub", "rlow", "llow", "rmid", "lmid", "rhigh", "lhigh", "rtoslink", "ltoslink" {
output "rlow", "llow", "rmid", "lmid", "rhigh", "lhigh" {
      device: "alsa" { device: "hw:CARD=USBStreamer,DEV=0";}; # ignore_xrun: true; };
      sample: "S32_LE";
      channels: 10/0,1,2,3,4,5;
      delay: 0,0,0,0,0,0;
      dither: false;
};

## FILTERS ##
filter "llowfilter" {
      from_inputs: "left"/0.5;
      to_outputs: "llow"/0;
      coeff: "leftwof";
};

filter "rlowfilter" {
      from_inputs: "right"/0.5;
      to_outputs: "rlow"/0;
      coeff: "rightwof";
};

filter "lmidfilter" {
      from_inputs: "left"/0.5;
      to_outputs: "lmid"/0;
      coeff: "leftmid";
};

filter "rmidfilter" {
     from_inputs: "right"/0.5;
     to_outputs: "rmid"/0;
     coeff: "rightmid";
};

filter "lhighfilter" {
     from_inputs: "left"/0.5;
     to_outputs: "lhigh"/0;
     coeff: "lefttwet";
};

filter "rhighfilter" {
     from_inputs: "right"/0.5;
     to_outputs: "rhigh"/0;
     coeff: "righttwet";
};

#filter "rtoslinkfilter" {
#      from_inputs: "right"/0.5;
#      to_outputs: "rtoslink"/0;
#      coeff: 1;
#};
#
#filter "ltoslinkfilter" {
#      from_inputs: "left"/0.5;
#      to_outputs: "ltoslink"/0;
#      coeff: 1;
#};

Tout les filtres ont été générés avec Rephase : Mono 24 Bit à 192KHz en .wav

---

J'oubliais...

Pour compiler brutefir il faut installer les packages suivant via la commande suivante :

Code :

sudo apt-get install libfftw3-dev flex libasound2-dev jack libjack0 libjack-dev