Hi @Anonymous ,
Do you want to play the audio recorded in your Android device within other different devices or browser?
The Important thing you need to know is that -- the Audio recorded through is stored in 3gp format in Android, AAC format in iOS, and OGG format in web browsers.
Based on the issue that you mentioned, I have made a test on my side, if you want the audio record captured in your Mobile device to be played well in web browser, I afraid that there is no way to achieve your needs.
When you capture the audio record in your web browser, and save it back to your SP List (using JSON function), the saved value format looks like below:
ata:audio/webm;base64,GkXfo59ChoEBQveBAULygQRC84EIQoKEd2VibUKHg.....
but when you capture the audio record in your Mobile device, the saved value format looks like below:
temp/recording_F2EFA810-9A3D-4CEF-B5E9-21C2D689F27F-9957-00000B71D1BE2FE0.aac // iOS device
TempFiles/microphone-audio324004184795122229.3gp // Android device
Currently, the ACC format and 3GP format of Audio data could not be played within web browser. If you would like this feature to be added in PowerApps, please submit an idea to PowerApps Ideas Forum:
https://powerusers.microsoft.com/t5/Power-Apps-Ideas/idb-p/PowerAppsIdeas
Best regards,