I found and fixed the problem (I think) for i2s dac. Please install the last version. Let me know
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Thanks for getting back to me Balbuze, much appreciated. 
Makes sense as my AlloDigiOne uses I2S.
I will try this and let you know, but it may be 2-3 days before I get round to it.
Pretty busy for next 2 days.
Paul E
And just to confirm, installed version 1.8.5 and output device now comes up as Dsp -> Allo DigiOne, audio plays fine, and problem now solved. Many thanks Balbuze.
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Hello balbuze,
as a new Volumio user I like to shorten the way, thats why I turn to you. 
So far I have been using Acourate with LMS. I want to continue using Acourate so I need the brutefir Plugin.
I havenāt read the whole thread and surely you can find the information somewhere. But I would like to ask someone to explain me how to install brutefir via SSH as a plugin. It is described in the manual but I miss the first step.
Thanks a lot and Regards
In the readme of the plugin, it is explained to install it.
First, enable SSH. A link is given to do that. You can also find it in the doc of Volumio. It is simply the address IP of your device plus /dev ex: 192.168.1.10/dev. Presse enable under SSH.
Then enter the commands as described in the readme in the section āhow-to installā.
Thatās it
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Hi balbuze,
Iām having trouble to get DSP running. Installation of volumio and DSP is fine. Playback without DSP is ok, yet after activation of DSP I will get no sound anymore. I use the following configuration
- RPI3B with Allo DigiOne
- Volumio v2.806
- Brutefir latest build from Github as of August 4th
Extract from the log after activation:
volumio[1000]: info: Starting brutefir
volumio[1000]: info: no delay needed
volumio[1000]: info: --------->filter format None text
volumio[1000]: info: --------->filter size 65536
volumio[3050]: Filters in process 1: 1 3
volumio[1000]: info: --------->Skip value for wav :
volumio[1000]: info: File size found in array!
volumio[1000]: S24_LE
sudo[3056]: volumio : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/systemctl restart brutefir.service
ā¦
volumio[3062]: Filters in process 0: 0 2
volumio[3062]: Filters in process 1: 1 3
volumio[3062]: ALSA I/O: Could not set audio output parameters for āhw:2ā:
volumio[3062]: Failed to set sample format to S24_LE: Invalid argument.
volumio[3062]: Failed to init output device.
volumio[3062]: Failed to initialise digital audio interfaces.
systemd[1]: brutefir.service: main process exited, code=exited, status=1/FAILURE
systemd[1]: Unit brutefir.service entered failed state.
systemd[1]: brutefir.service holdoff time over, scheduling restart.
systemd[1]: Stopping brutefir Daemonā¦
ā¦
systemd[1]: brutefir.service start request repeated too quickly, refusing to start.
systemd[1]: Failed to start brutefir Daemon.
systemd[1]: Unit brutefir.service entered failed state.
Using no or the demo filter gives the same result (no sound). Volumio plays normally after de-activation of DSP.
Can you help?
Hi,
Try to change output format. I canāt tell you which one would work as it depends on the hardware
Balbuze, please help!!! Pretty desperate here. Only reason I have Volumio is to use Brutefir but I have yet to get it working. I am using volumio loaded on an RPI4 with USB out to a Denafrips DAC. With Volumio on output playback dsp-USB and Brutefir plug on, I do not get any sound out. I have to go back to output playback and change to USB to get sound out. Of course, once I change the playback output, Brutefir player is not started.
http://logs.volumio.org/volumio/GhSSZsb.html
a798e05b37ababa4bbde6e866edfcf7d
Did a quick scan of the error logā¦
Not sure if this is the issue or how to fix it.
Hello.
Have you tried with demo filter?
It canāt work with your filters because they have space in their name. Please rename it by using - instead of space.
When the plugin is enabled, do not change anything in playback settings, or it wonāt work for sure.
Let me know
SOLVED!!! filters changed to no space and format output also needed to be changed. AWESOME!
yeah! very glad you solved it ! let know how it behaves!
Iāll add a warning with filters naming 
Hi, I tried all available output formats. I tested with filter set to ānoneā and rebooted after each change. Still I donāt get any sound.
Can you give some log please.
Ty
See the help page for that
Sure, please see below
http://logs.volumio.org/volumio/SQRFw9v.html
I was using output format Factory_S24_3LE. Log starts after reboot and activation of BruteFir
Thank you
please try FACTORY_S24_4LE. An other reports having it working with thatā¦ : https://github.com/balbuze/volumio-plugins/issues/275
Thank you for the support, I did not check github for any reports.
Selecting FACTORY_S24_4LE works indeed.
While testing this setting, I found some odd behaviour. After selecting a demo filter (sound still ok) and reverting back to no filter, sound would not come back. I did not touch the output format. Looking into the log, it seems, output format was changed to S32_LE (in the log at 16:46:26)
http://logs.volumio.org/volumio/cw2LqbG.html
I tried to reproduce this behaviour but after another reboot everything works fine (goods news 
) including switching filters and switching also between different output formats.
Again, thank you for looking into it.
Very weirdā¦ I never saw thisā¦ I hope youāll enjoy DRC ! Donāt try to change output format when one is ok
Balbuze, this plug-in is awsome! Thanks very much for all you do. What is your recommendation for highest quality of filters using REW/? If I use sweeps at 48 khz rates, should I then export the filter impulse wav at 48Khz and ensure the plug in reflects that rate? Should I also export as a 32-bit PCM? I do not bump any frequencies, just cuts so my attenuation for both channels is always zero, and I only equalize bass region of 80 Hz and lower.
Thanks again
I use only 44.1kHz sweep and filter as I mostly listen 44.1 flac file. I never considered upsampling as a solution to improve sound quality. Though, I suggest to use filter at least 65536 tap long. For the format, no one is better than an other as far as itās supported.
You can use Rew to generate them or export impulse from Rew to the plugin to generate them using Drc-fir.
Using Rew allows you to select the range where you apply the correction (from X Hz to Y Hz)
Understood balbuze. For delays in the Brutefir plugin, can the app apply delays in the 10th of a ms? If I enter 0.9, will the software apply 0.9 or default to 1? What about hundredths of a ms? I am using the delay field to maximize the phantom center image vs actually physically moving the speakers.