RUNE Audio and Brutefir (Convolver for Roomcorrection)

[theSuede]

[tux]

[Da Alchemist]

Sorry for being absent a long time . Fact is I do not use Runeaudio any more because i did not understand how to compile things by myself on Arch.
I gave some tips on the other forum, but the steps in Rune are basically the same. I do not use the other "Player" either, but I do use MPD. At the moment i use the pi as player DSP (Room Correction) and Crossover sending multichannel PCM via HDMI to an AVR. This deserves some Kernel modification.

https://volumio.org/forum/volumio-with- ... t3635.html


Regards

[danhilu]

Hi Da Alchemist,
Thank you for posting, this his helpfull.
You mention "i use the pi as player DSP (Room Correction) and Crossover sending multichannel PCM via HDMI to an AVR".
With multichannel do you mean 2 (right / left) or 4 or 6 (i.e. left right combined with low / med / high) ?
In case you managed to output 4 or 6 channel to PCM via HDMI on the Raspbery Pi I would be very gratefull to have details (and I would not be alone see http://rtaylor.sites.tru.ca/2013/06/25/ ... are-howto/ no solution yet on the Pi).
Danke im voraus fuer deinen Feedback
Daniel.

[cmsgarb]

hi Da Alchemist,

regarding regarding brutefir on Runeaudio I have one question. how did you manage to edit mpd.conf permanently. I also tried brutefir on Runaudio but observed thar after reboot I get the original mpd.conf


Best Regards

Christian


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[Da Alchemist]

[cmsgarb]

thanks.....


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[Da Alchemist]

@danhilu

I gave some advice to the multichannel thing here: http://www.diy-hifi-forum.eu/forum/show ... stcount=87

Regards

[jrubins]

[AlleyCat]

Hi there,
I have been setting up filets with MiniDSP for a while and am familiar with measuring acoustics. I am specifically interested to run the filters on the RuneAudio. I followed the tutorials provided by Da Alchemist and info posted at https://volumio.org/forum/volumio-with- ... t3635.html. Thank you all!

I am getting no sound to the DAC. Can you please review where my configuration may fail?

Hardware is Pi2B with HiFiBerryDAC+.

RuneAudio is 0.3beta with GUI update.
MPD is 0.19.6-1

play -l
[root@rune2 home]# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

Output section of /etc/mpd.conf
audio_output {
type "pipe"
name "brutefir pipe"
command "/usr/local/bin/brutefir -nodefault /home/.brutefir.conf 2>/dev/null"
format "44100:32:2"
}

.brutefir.config

sampling_rate: 44100;
filter_length: 32768,16;
overflow_warnings: true;
float_bits: 64;

input "left", "right" {
device: "file" {path: "/dev/stdin";};
sample: "FLOAT64_LE"; # sample format
channels: 2; # number of open channels / which to use
delay: 0,0; # delay in samples for each channel
maxdelay: -1; # max delay for variable delays
mute: false,false; # mute active on startup for each channel
};

output "left", "right" {
# device: "file" {path: "/dev/stdout";};
device: "alsa" { device: "hw:0,0"; };
sample: "S16_LE"; # sample format
channels: 2; # number of open channels / which to use
delay: 0,0; # delay in samples for each channel
maxdelay: 100; # max delay for variable delays
mute: false,false; # mute active on startup for each channel
dither: false; # no dither for 32 bit output
};

# factor 0.4 to avoid clipping
filter "M direct" {
from_inputs: "left"//0.4, "right"//0.4;
to_filters: "left direct", "right direct";
coeff: -1;
crossfade: false;
};

# here 0.8 instead of 0.4 because the filter "in average" multiplies with 0.5
# (one could make 0.8 a bit larger/smaller to obtain a wider/narrower
# stereo image, but better use RACE for this)
filter "S filter" {
from_inputs: "left"//0.8, "right"//-0.8;
to_filters: "left direct", "right direct";
#coeff: "S channel";
coeff: -1;
crossfade: false;
};

filter "left direct" {
from_filters: "M direct"//1.0, "S filter"//1.0;
to_outputs: "left"/0.0;
#coeff: "left_default";
coeff: -1;
crossfade: false;
};

filter "right direct" {
from_filters: "M direct"//1.0, "S filter"//-1.0;
to_outputs: "right"/0.0;
#coeff: "right_default";
coeff: -1;
crossfade: false;
};


Thank you

AlleyCat