In the Hobonichi Techo App, BGM and sound effects play in various situations, including the following, to make your daily use of the app more enjoyable.
Sound Effects
When launching the app
When "Senpai" speaks
When turning pages
When selecting "Today's Cover"
When receiving "Omake"
When posting or deleting content
BGM
When opening the "Omake" screen
When playing a slideshow in full screen on the monthly calendar
How to change BGM and sound effect settings
Tap Menu at the bottom right of the app.
Tap Settings & Payment Information.
Tap Techo Settings.
You will find the "BGM" and "Sound Effects" sections. Slide the buttons to switch them ON or OFF.