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Thread: Is it possible to connect two Teensys via I2S?

  1. #1

    Is it possible to connect two Teensys via I2S?

    Hi all,

    I wonder if it is possible to connect two Teensys via I2S? What I want to do:
    - One Teensy with MIDI-IO generates the audio (=synth, I2S-out)
    - The other one gets the signal (I2S-in) and adds effects (filters, reverb, chorus, flanger, ...)

    Is this possible? Or is there a better way to send audio data from one Teensy to another?
    What to do if I want to use n Teensys for audio generation and one for mixing them (digital) up and adding effects?

    Thanks, Holger

  2. #2
    Senior Member PaulStoffregen's Avatar
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    This falls into the realm of stuff that should work, but so far nobody as tried. Or if they have, nobody has said anything, as far as I know.

    To make this work, one Teensy would need to use I2S master mode and the other I2S slave mode. Don't confuse this with transmit & receive. The master is the side which generates the clock signals and the slave makes its clock pins as inputs, so its audio runs at whatever speed the master uses.

  3. #3
    Hi Paul,

    thanks for your answer. I think I will try this as soon as my next Teensy will arrive (and I will post my results here).

    Regards, Holger

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