The behavior you're describing is likely related to the speaker configuration on your iPhone 8. The iPhone 8, like many other smartphones, features stereo speakers. In the case of the iPhone 8, there is a speaker located at the bottom of the device, and another speaker located in the earpiece at the top of the device.
When you're holding your iPhone 8 in portrait orientation (vertical), the stereo audio is primarily channeled through the bottom speaker. This is the default speaker used for phone calls, media playback, and other audio-related functions.
However, when you rotate your iPhone 8 to landscape orientation (horizontal), the stereo audio experience changes. In landscape mode, the iPhone 8 uses both the bottom speaker and the earpiece speaker to create a stereo effect. This results in a broader soundstage and potentially different volume levels for different types of content.
The reason you might notice different sound levels when rotating the phone left or right in landscape mode could be due to the way the audio channels are balanced. In some cases, one of the speakers might be playing slightly louder than the other, leading to the perception of different sound levels depending on the rotation.
It's worth noting that these sound variations are normal and are a result of the intentional design of stereo speakers in smartphones. Manufacturers aim to create an immersive audio experience by using multiple speakers to simulate a more spatial sound output.
