S-3000: Will sound from audio input get sent to audio line out?

[JHowzer]

My goal:

- Take Zoom piano lessons without having to use piano speakers (so neighbor doesn't get angry)

 

Current setup:

- Privia PX S-3000 audio out is connected to M-Audio M-Track Duo

- M-Track Duo audio interface is connected to Mac's USB port

- To prevent sound coming from speakers, plug random headphones into headphone jack.

- On laptop in Zoom, input/output sound coming to/from USB (audio interface)

 

Now the problem is that I can't simultaneous talk through Zoom since the audio is coming from the audio interface (as opposed to my laptop mic).

 

Option 1: ($60+) Buy a microphone and plug into audio interface

Option 2: Is this even feasible?

- (~$3) Buy a 3.5mm to 3.5mm aux cable.

- One end of newly purchased cable to Privia Audio In jack

- Second end of cable to 3.5mm to lightning converter, which is connect to iPhone

- Download/Use free Microphone app on iPhone

- I'm hoping that the sound from my iPhone to the Privia audio-in also gets sent through the audio-out to the audio interface and through Zoom (and doesn't have delay)

 

Just curious if Option 2 is even a feasible option? It's rather complex, but it could potentially save me from having to buy a microphone just for the sake of taking piano lessons.

 

Thank you for any advice! Looking forward to hearing people's thoughts

 

PS. I tried bluetooth audio in from my iPhone to the keyboard, but there was a delay when I spoke into my iPhone.