[AudioI] problems with audioinjector octo boise.

[Matt Flax]

Hi there,

I had a look at your .asoundrc file. Any reason why you specify the 
format of s24le and the lfloat plugin ? At this point I'm thinking it is 
possible this plugin is causing your problems.

When you remove that and add the following does anything change ? This 
is from the setup script :

     echo 'pcm.!default {
#       type hw
#       card 0
         type plug
         slave.pcm "anyChannelCount"
}

ctl.!default {
         type hw
         card 0
}

pcm.anyChannelCount {
     type route
     slave.pcm "hw:0"
     slave.channels 8;
     ttable {
            0.0 1
            1.1 1
            2.2 1
            3.3 1
            4.4 1
            5.5 1
            6.6 1
            7.7 1
     }
}

ctl.anyChannelCount {
     type hw;
     card 0;
}' > /tmp/asound.conf

echo 'pcm.!default {
#       type hw
#       card 0
         type plug
         slave.pcm "anyChannelCount"
}

ctl.!default {
         type hw
         card 0
}' > ~pi/.asoundrc

     sudo mv /tmp/asound.conf /etc/asound.conf


On 14/5/23 06:06, OGIS OatGrain-InnovationS via People wrote:
> Hi,
> I own two audioinjector octo-s.
> In 2022,._some months ago _I tested the signal to noise ratio  and  
> ground noise
> for empty, not attached devices I got the expected results better than 
> -90dB
> Now, in May 2023- best Imy results *are widely worse about  -*55dB !!!
> It looks that I do no more  use the full resolution of  24 bits.
>
> On /diyAudio/ it  shows up to -95 dB
> https://www.diyaudio.com/community/threads/introducing-the-audio-injector.302508/post-5065706
>
> REMARK: I use KDE5 plasma with Pulseaudio., same as in 2022
> *QUESTION*: Are there known  problems with the 6.x.y kernels or has 
> anybody an  idea?
> the last kernel was somethng around 5.1x.y
>
> I*now use  kernel 6.2.1 (64bits)*
> $uname -a
> Linux pi4-injector-0 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 
> BST 2023 aarch64 GNU/Linux
> TWO FINDINGS:
> A)
> Recording audio via Audacity I get obvious crappy signals (see 
> attachments.)
> the input  signal should be that large and somehow wit digital steps?
>
> Using  gnuradio to calculate a  FFT-analysed  spectrum I get 
> distortion  and noise between frequencies below  22kHz above the 
> distortion strangely is reduced .
> I tried sampling at 48kHz, 96kHz and even the highest 192kHz.
> Same results for all of Rates.!!!
> stangel: Ouside the 22kHz bandwidth, the signal /nose is almost as 
> expected.
> The card seems to be detected properly.
>
> I  attached the *audacity-recordin*g, the *gnuradio spectrum *and
>  the  result of *alsa-info*. and my */boot/config.txt*
> Anybody any Idea?
>
>
> $play -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM i2s-hifi-0 [MAI PCM 
> i2s-hifi-0]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 1: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM i2s-hifi-0 [MAI PCM 
> i2s-hifi-0]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 2: audioinjectoroc [audioinjector-octo-soundcard], device 0: 
> AudioInject-HIFI cs42448-0 [AudioInject-HIFI cs42448-0]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
>
>
>
>
> ----------------- here is my /etc/asound.conf
>
> pcm.octo {
>     type route
>     slave{
>      type lfloat             # Linear<->Float conversion PCM
>         slave {                 # Slave definition
>             pcm "plughw:CARD=audioinjectoroc"
>             format s24le
>         }
>
>         channels 8
>     }
>     ttable {
>            0.0 1
>            1.1 1
>            2.2 1
>            3.3 1
>            4.4 1
>            5.5 1
>            6.6 1
>            7.7 1
>     }
>     hint {
>         show {
>            @func refer
>            name defaults.namehint.extended
>         }
>         description "AudioInjector Octo Card (upto 6 channels input, 
> upto 8 channels output)"
>     }
> }
>
> ctl.octo {
>     type hw
>     card "audioinjectoroc"
> }
>
>
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