# Audio injector audio input working? \[Solved?\]

**URL:** <https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377>\
**Category:** Building Zynthian\
**Created:** [July 5, 2020, 7:38pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377 "2020-07-05T19:38:33Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 5, 2020, 7:38pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/1 "2020-07-05T19:38:33Z")

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My Audio input on the Audio Injector card seems to have died.  
Output is ok.

I’ve tried two different cards and both behave the same way. They certainly were working. . .

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**Author:** ![ronsum](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/r/ecb155/32.png) [@ronsum](https://discourse.zynthian.org/u/ronsum)\
**Post date:** [July 5, 2020, 9:18pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/2 "2020-07-05T21:18:34Z")

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Is your bypass pedalboard kick switch in the circuit?

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 5, 2020, 9:43pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/3 "2020-07-05T21:43:42Z")

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A emphatically no. Cos I can play fluidsynth using a midi keyboard.

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**Author:** ![ronsum](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/r/ecb155/32.png) [@ronsum](https://discourse.zynthian.org/u/ronsum)\
**Post date:** [July 5, 2020, 10:27pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/4 "2020-07-05T22:27:49Z")

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I was just grasping at straws because I noticed your bypass switch wiring diagram didn’t show ground connections.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 6, 2020, 4:52am UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/5 "2020-07-06T04:52:43Z")

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Grounds are allommoned around the switch.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 7, 2020, 5:36pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/6 "2020-07-07T17:36:18Z")

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Well the audioinjector that was spectacularly failing in zynthian-pedal.local works when transplanted to zynthian-alm.local

 ![image](https://discourse.zynthian.org/uploads/default/original/2X/d/dc559629961c5efc699b257249c12af21bd6331e.png)

Ive tried another audio-injector zero and that fails in zynthian-pedal.local as well.

So I suspect the build.  
Not sure how to go about testing the input side of an audio injector. Could this be another effect like the renaming of the hdmi & rpi-internal ports?

THere is a slight diffference in the reported aplay -L outputs.

 ![image](https://discourse.zynthian.org/uploads/default/original/2X/c/cccf43c706e2889837588c8490fa8a385bebd6a1.png)

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**Author:** ![riban](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/riban/32/2331_2.png) [@riban](https://discourse.zynthian.org/u/riban)\
**Post date:** [July 7, 2020, 6:40pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/7 "2020-07-07T18:40:19Z")

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I thought you were having problems with audio input. You seem to have shown list of output devices.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 7, 2020, 7:12pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/8 "2020-07-07T19:12:16Z")

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I’m just dumping anything that seems relevant.  
It’s one of those it should work but doesnt issues.

I suspect that if I update the zynthian-alm.local machine it will probably stop working as well.  
It’s probably occurred around the time we offered the mono options for inputs but I know I had that all working.

Presumably, being unix there is a file I should be able to pipe the aufdio in to… ? not sure I;m sure I’d have to kill off jack first to get it working, but at least I now know I’ve not killed the cards.

One for @MrBroccoli perhaps. I reckon his audioinjector should work in a 3…  
I wonder if its Pi4 versus Pi3 …?

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**Author:** ![riban](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/riban/32/2331_2.png) [@riban](https://discourse.zynthian.org/u/riban)\
**Post date:** [July 7, 2020, 7:31pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/9 "2020-07-07T19:31:32Z")

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Does the input appear as a JACK source and is it routed? You could install and run patchage or just run `jack_lsp -c` to show all jack ports and their connections.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 7, 2020, 7:37pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/10 "2020-07-07T19:37:23Z")

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[jack\_lsp.txt](https://discourse.zynthian.org/uploads/short-url/jdiPSb204iFcJl2A614WvUDbt9h.txt) (2.9 KB)

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**Author:** ![riban](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/riban/32/2331_2.png) [@riban](https://discourse.zynthian.org/u/riban)\
**Post date:** [July 7, 2020, 7:44pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/11 "2020-07-07T19:44:05Z")

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Okay - looks like a routing issue. system:capture\_1 and system:capture\_2 are not routed. Have you tried reasserting the Audio FX-Layer, i.e. remove layer then add the audio layer? There have been issues in the past (mentioned by @Baggypants) where routing is lost during updates. I did notice there is some compatibility code around this in the auto-router to attempt to reduce the risk of this but defo worth a try. If that fails, try starting in debug mode as there is a bit of logging in auto router.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 7, 2020, 7:46pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/12 "2020-07-07T19:46:34Z")

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I think I’ve tried most things I can think of, certainly removed the audio in components and rebuilt it with the sane result. It’s been so dead on the audio in side that, as I said, I thought I’d killed the cards.

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**Author:** ![riban](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/riban/32/2331_2.png) [@riban](https://discourse.zynthian.org/u/riban)\
**Post date:** [July 7, 2020, 7:49pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/13 "2020-07-07T19:49:39Z")

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Okay - I reckon you need to gather debug logs as you add an audio layer.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 7, 2020, 7:57pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/14 "2020-07-07T19:57:13Z")

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[debug\_whilst\_loading\_audio\_mixer.txt](https://discourse.zynthian.org/uploads/short-url/pOAT8Sg0KA3NOCuVyMKwMr3QbmX.txt) (24.1 KB)

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<div class="post-metadata">

**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 7, 2020, 7:59pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/15 "2020-07-07T19:59:13Z")

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And it’s magically started working !!! 😃

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**Author:** ![riban](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/riban/32/2331_2.png) [@riban](https://discourse.zynthian.org/u/riban)\
**Post date:** [July 7, 2020, 8:58pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/16 "2020-07-07T20:58:10Z")

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Glad to have been of assistance 😊

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 8, 2020, 2:40am UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/17 "2020-07-08T02:40:25Z")

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All I can think of was that I cleared down the default setting, and stored it with no layers attached.

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [July 9, 2020, 7:15pm UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/18 "2020-07-09T19:15:13Z")

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I’m even more amazed that i wasn’t challenged for a 🧐 …

So here is one.

[/uploads/default/original/2X/c/c76f29b76f01896f3b3af923c589a290c7c6e7b7.ogg](https://discourse.zynthian.org/uploads/default/original/2X/c/c76f29b76f01896f3b3af923c589a290c7c6e7b7.ogg)

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**Author:** ![SirBlackmore](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/s/53a042/32.png) [@SirBlackmore](https://discourse.zynthian.org/u/SirBlackmore)\
**Post date:** [December 9, 2020, 7:19am UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/19 "2020-12-09T07:19:30Z")

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Hi again! @wyleu I have almost finished mine.

 ![Zynthian 1](https://discourse.zynthian.org/uploads/default/original/2X/9/95946eb9ac95a950d00048f561393640733b393f.jpeg)

BUT… I think I have a problem similar to yours. I’ve tried before my Audio Injector Zero soundcard (with a RPi3) with no issues, inputs and outputs were working properly.

But now, after managing to put everything inside a small box, and using a RPi4 with a new SD and new Zynthian image, everything’s working except the audio input. No sound. I have tried with the audio recorder, with the MOD UI and even turning aubionotes on. Nothing. Checked wiring again with a multimeter but it seems to be ok.

I followed this too:  
[https://github.com/Audio-Injector/stereo-and-zero](https://github.com/Audio-Injector/stereo-and-zero)

Do you remember how did solve your problem with it?

That’s why I still haven’t posted my Zynthian to the success cases… but I’m preparing a slightly complex cover playing all the instrument with my Zynthian… Coming soon.

Thank you everyone!

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**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [December 9, 2020, 7:43am UTC](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377/20 "2020-12-09T07:43:15Z")

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Alsamixer is your staring point. There is a capture setting and this needs to be enabled. Also make sure you can select the injector card inalsamixer  
I’ll try to generate some pictures…

[Next page](https://discourse.zynthian.org/t/audio-injector-audio-input-working-solved/4377.md?page=2)