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Thread: HDMI input

  1. #1
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    HDMI input

    Hi - I have Picoreplayer installed on several Raspberry Pi 3’s scattered around, with one serving as an LMS server. Two of them have Hifiberry Amp2 cards with speakers connected, and one goes directly into a stereo amplifier. It all works great.

    My question is whether it is possible to use the HDMI port on the Raspberry Pi as an audio input source, and route the audio out through the hifiberry amp?

    The use case is this. The raspberry pi unit that serves as the LMS server sits next to a TV. I would like to take the HDMI output from the TV, parse out the video signal (this I know how to do), and run the remaining audio into the raspberry pi and have it play through the amp through the speakers.

    Thanks for the help!

  2. #2
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    Quote Originally Posted by Bob01 View Post
    My question is whether it is possible to use the HDMI port on the Raspberry Pi as an audio input source, and route the audio out through the hifiberry amp?
    HDMI Device is output only.

  3. #3
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    You can however use a 2 way USB sound card such as a Behringer UCA202 which will give you 16/44.1 in and out.
    4 x RCA, Optical out & USB
    piCorePlayer will see the card as an output out of the box but you will need to use additional modules which may not be available in pCp to get the Pi to read its input
    VB2.4 storage QNAP TS419p (NFS)
    Living Room - Joggler & SB3 -> Onkyo TS606 -> Celestion F20s
    Office - Pi3+Sreen -> Sony TAFE320 -> Celestion F10s / Pi2+DAC & SB3 -> Onkyo CRN755 -> Wharfedale Modus Cubes
    Dining Room -> SB Boom
    Kitchen -> UE Radio (upgraded to SB Radio)
    Bedroom (Bedside) - Pi2+DAC ->ToppingTP21 ->AKG Headphones
    Bedroom (TV) - SB Touch ->Sherwood AVR ->Mordaunt Short M10s
    Everything controlled by iPeng

  4. #4
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    Thanks for the replies. I’ll look into the USB soundcard.

    Bob

  5. #5
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    Hi Bob

    Did you figure something out? I have similar and would like to achieve the same i.e. TV audio out and into Squeezebox/LMS infrastructure (via ethernet) or into nearby Raspberry PI with DAC and AMP to kitchen ceiling speakers.

    Regards

    Mike
    Music Server: VortexBox (2.4) > LMS 7.9.1
    Study: Squeezelite player (from the VBA) > PC powered speakers with subwoofer.
    Lounge: SB3 > Marantz hifi > B&W speakers
    TV room: SB3 > Denon Receiver > KEF eggs 5.1/ Wharfedale Diamonds
    Kitchen: RPi2 (Max2play), IQaudioDAC/Amp > KEF ceiling speakers
    Outdoors: RPi3 (Max2play), IQaudioDAC/Amp > KEF outdoor speakers
    Bedroom: Logitech Squeezebox radio
    Controllers: iPeng & Squeezepad, RPi3 (Max2play, Jivelite) with touchscreen, LMS (VBA)

  6. #6
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    Getting the audio input from the USB card can be done using the WaveInput plugin.
    One thing to note though ... the audio will probably be considerably delayed (a few seconds) compared to real-time so while this could be good for listening to a TV programme, it would not be much use if trying to watch it at the same time.

    As an example - this is what I have set in my Favorites to take input from a behringer USB device that is attached to a turntable
    wavin:sysdefault:CARD=CODEC
    Paul Webster
    http://dabdig.blogspot.com
    Author Radio France (FIP etc) plugin

  7. #7
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    Quote Originally Posted by Paul Webster View Post
    Getting the audio input from the USB card can be done using the WaveInput plugin.
    One thing to note though ... the audio will probably be considerably delayed (a few seconds) compared to real-time so while this could be good for listening to a TV programme, it would not be much use if trying to watch it at the same time.

    As an example - this is what I have set in my Favorites to take input from a behringer USB device that is attached to a turntable
    wavin:sysdefault:CARD=CODEC
    The delay can be reduced if compression to Flac is disabled (i.e. play WAV/PCM) . There is a another tweak to bufferlevel - but it is very system /player dependent.

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