AJ

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  1. 10 votes
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    AJ commented  · 

    I agree, the background images on the screen based devices do an Alpha crossfade, So I believe the hardware can handle fading. I say video fades for loops need to be a feature and especially for audio! Don't forget the crossfade for similar audio, the fade curves need to be equal power, and for dissimilar audio they need to be equal gain linear (straight 45degree angle) curves. message me if you need details.

  2. 3 votes
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  3. 3 votes
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    AJ commented  · 

    Save the devs finger strain, let devs self - check with history in the ASK gui console.

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  4. 1 vote
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  5. 4 votes
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  6. 11 votes
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    AJ commented  · 

    In regards to my previous post, use the levels references stated by Amazon (not -4 decibels) that was just an approximation.

    However, you can record the audio from other flash briefings, then manually adjust their 'gain' in your software until it reaches the levels stated by Amazon ( -14 dB LUFS/LKFS ) as a reference.

  7. 36 votes
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    AJ commented  · 

    The Alexa hardware team would need to implement an Automatic-Gain-Control, then Dynamics processor pair of dsp functions to accomplish volume 'leveling.'

    That function would have to then be un-activated for text based updates, reactivated for an audio brief, un-activated for the next text based update but still keep the previous audio levels, then carry those settings forward for the next audio brief's amplitude...etc.

    If you need a band-aid solution in the meantime, you can use a compressor on your content to reduce the peaks gain by 3-6 decibels, then normalize the audio with make-up gain so the newly reduced peaks are around -4 decibels on a digital scale.

    Those numbers should help reduce any deficits with a skill-dev's levels, but keep in mind that professional audio engineers do things that cannot be easily explained or taught on forums, but many studios and online audio freelancers should be able to process your files for you.

    For a technical response only; 'levels' aren't always relevant more than 'density' (dynamic range of content), for example, a McDonald's radio commercial may only have 1 decibel of difference between its loudest and quietest audio peaks, but where an amateur commercial may have 20 to 30 decibels of difference.

    If a skill-dev wants to truly give themselves a reference they can work toward, I'd recommend the following test:

    1) activate a number of broad-scale flash briefing skills (major networks etc)
    2) plug an audio cable from your device into the line input of an audio card
    3) set the Amazon device's output moderately high, but not clipping or 'in the red' on your
    computer.
    3) record a full volley of audio from those skills
    4) normalize the recorded audio to -4 decibels or so
    5) save the file as a reference for later
    6) compare and contrast

    Hopefully this is helpful to some devs.

  8. 136 votes
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    AJ commented  · 

    I commented here before I utilized the built-in intents that come from activating the "Audio Player Interface."

    For a skill that needs to be interrupted during audio playback: if the new command is related to starting over, skipping etc. The interface for Audio player provides an exemption for the "invocation name" to have to be said.

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    AJ commented  · 

    Thank you for sharing this!

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