# How to check audio from TE

**URL:** <https://forum.juce.com/t/how-to-check-audio-from-te/68113>\
**Category:** Tracktion Engine\
**Created:** [February 2, 2026, 3:25pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113 "2026-02-02T15:25:40Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![THM](https://avatars.discourse-cdn.com/v4/letter/t/6a8cbe/32.png) [@THM](https://forum.juce.com/u/THM)\
**Post date:** [February 2, 2026, 3:25pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/1 "2026-02-02T15:25:41Z")

</div>

Hi all,

I have a strange issue. In my JUCE/TE project if I go the AudioDeviceManager windows (the classic from JUCE) and I click test I ear audio and I can also see audio coming from the inputs.

But when I add a clips (midi or audio) to the edit I ear nothing and I don’t see the mixer moving.

What I’m missing? There is something to do to match the JUCE audio device to the edit?

Before it was working but then it stops and I don’t find the problem ☹

Another point is that is working on my windows dev PC but not on the raspberry with HiFi Berry.

But on the raspberry if I do some test via command line I can ear sound!

Thanks in advance!

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<div class="post-metadata">

**Author:** ![baramgb](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/baramgb/32/12822_2.png) [@baramgb](https://forum.juce.com/u/baramgb)\
**Post date:** [February 3, 2026, 3:35pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/2 "2026-02-03T15:35:39Z")

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Without showing your code, nobody will know whats going on. What is about the demo projects? Does it works?

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<div class="post-metadata">

**Author:** ![THM](https://avatars.discourse-cdn.com/v4/letter/t/6a8cbe/32.png) [@THM](https://forum.juce.com/u/THM)\
**Post date:** [February 4, 2026, 11:19am UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/3 "2026-02-04T11:19:21Z")

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@baramgb you are right sorry.

Basically I have this in my App.cpp

```auto
App::App(tracktion::Engine& engineRef)
    : engine(engineRef)
{
    App::instance = this;

    auto& dm = engine.getDeviceManager();

    dm.initialise();
    dm.rescanWaveDeviceList();
    dm.rescanMidiDeviceList();

    auto& juceDM = dm.deviceManager;

#if JUCE_LINUX
    juceDM.setCurrentAudioDeviceType("ALSA", true);
#endif

    auto result = juceDM.initialiseWithDefaultDevices(/*ins*/0, /*outs*/2);
    if (result.isNotEmpty())
    {
        juce::Logger::writeToLog("MINBOOT: FAILED initialiseWithDefaultDevices: " + result);
    }
    else
    {
        if (auto* dev = juceDM.getCurrentAudioDevice())
        {
            juce::Logger::writeToLog("JUCE DEV OK: " + dev->getName()
                + " type=" + juceDM.getCurrentAudioDeviceType()
                + " sr=" + juce::String(dev->getCurrentSampleRate(), 0)
                + " bs=" + juce::String(dev->getCurrentBufferSizeSamples())
                + " outs=" + juce::String(dev->getOutputChannelNames().size())
                + " ins=" + juce::String(dev->getInputChannelNames().size()));
        }
        else
        {
            juce::Logger::writeToLog("JUCE DEV NULL after init");
        }
    }
...

```

And I see this:

```auto
Log started: 4 Feb 2026 12:11:19pm

Logger enabled
Audio block size: 64 Rate: 48000
JUCE DEV OK: default type=ALSA sr=44100 bs=512 outs=256 ins=0
[4 Feb 2026 12:11:22pm] TRACKTION outputs: num=1
[4 Feb 2026 12:11:22pm] Track 'Track 1' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 2' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 3' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 4' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 5' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 6' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 7' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 8' outDeviceID=(default audio output)
[4 Feb 2026 12:11:22pm] Track 'Track 9' outDeviceID=(default audio output)
device=default activeOut=11
outputs num=1

```

And If I go in the audio panel created by default from juce with the test button I ear sound correcty.

In the Demo of TE I can ear audio so I’m confused ☹

Thanks

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<div class="post-metadata">

**Author:** ![THM](https://avatars.discourse-cdn.com/v4/letter/t/6a8cbe/32.png) [@THM](https://forum.juce.com/u/THM)\
**Post date:** [February 4, 2026, 2:10pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/4 "2026-02-04T14:10:21Z")

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At the end I copied the Settings.xml from the DemoRunner and now it works again!

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<div class="post-metadata">

**Author:** ![baramgb](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/baramgb/32/12822_2.png) [@baramgb](https://forum.juce.com/u/baramgb)\
**Post date:** [February 4, 2026, 3:25pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/5 "2026-02-04T15:25:27Z")

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I guess you should not manage the device manager. The engine is handle the device manager. So if you load the settings of the demo, you repair the device manager. 😉 Have a look at [GitHub - debrisapron/tracktion-engine-hello-world: A super-simple JUCE/tracktion\_engine app which nevertheless makes a sound](https://github.com/debrisapron/tracktion-engine-hello-world)

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<div class="post-metadata">

**Author:** ![THM](https://avatars.discourse-cdn.com/v4/letter/t/6a8cbe/32.png) [@THM](https://forum.juce.com/u/THM)\
**Post date:** [February 9, 2026, 2:57pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/6 "2026-02-09T14:57:31Z")

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So you mean no deviceManager activation on the start of the app?

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<div class="post-metadata">

**Author:** ![dave96](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/dave96/32/8487_2.png) [@dave96](https://forum.juce.com/u/dave96)\
**Post date:** [February 9, 2026, 3:09pm UTC](https://forum.juce.com/t/how-to-check-audio-from-te/68113/7 "2026-02-09T15:09:29Z")

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That’s handled by the `Engine` constructor.